CommonConfigurationKeys (Apache Hadoop Common 3.4.1.200-dep-1000 API)

java.lang.Object
- org.apache.hadoop.fs.CommonConfigurationKeysPublic
- - org.apache.hadoop.fs.CommonConfigurationKeys

Direct Known Subclasses:

FtpConfigKeys, LocalConfigKeys, LocalFileSystemConfigKeys
```
@Private
@Unstable
public class CommonConfigurationKeys
extends CommonConfigurationKeysPublic
```
This class contains constants for configuration keys used in the common code. It inherits all the publicly documented configuration keys and adds unsupported keys.

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`CUSTOM_AUTH_METHOD_PRINCIPAL_CLASS_KEY`	A class that extends `Principal`
`static java.lang.String`	`CUSTOM_RPC_AUTH_METHOD_CLASS_KEY`	A class that extends `RpcAuthMethod`
`static boolean`	`DEFAULT_FS_CACHE_LRU_ENABLE`
`static int`	`DEFAULT_FS_CACHE_LRU_ENTRIES_EXPIRE_AFTER_ACCESS_MS`
`static int`	`DEFAULT_FS_CACHE_LRU_ENTRIES_MAX_SIZE`
`static java.lang.String`	`DEFAULT_HADOOP_HTTP_STATIC_USER`
`static boolean`	`DEFAULT_HADOOP_JETTY_LOGS_SERVE_ALIASES`
`static java.lang.String`	`DFS_CLIENT_IGNORE_NAMENODE_DEFAULT_KMS_URI`
`static boolean`	`DFS_CLIENT_IGNORE_NAMENODE_DEFAULT_KMS_URI_DEFAULT`
`static java.lang.String`	`FS_CACHE_LRU_ENABLE`	Enable/Disable LRU cache for the FileSystem entries
`static java.lang.String`	`FS_CACHE_LRU_ENTRIES_EXPIRE_AFTER_ACCESS_MS`	The length of time after an entry is last accessed that it should be automatically removed from the FileSystem cache
`static java.lang.String`	`FS_CACHE_LRU_ENTRIES_MAX_SIZE`	The maximum number of entries the FileSystem cache may contain
`static java.lang.String`	`FS_CLIENT_HTRACE_PREFIX`
`static java.lang.String`	`FS_HOME_DIR_DEFAULT`	Default value for FS_HOME_DIR_KEY
`static java.lang.String`	`FS_HOME_DIR_KEY`	Default location for user home directories
`static int`	`FS_PERMISSIONS_UMASK_DEFAULT`	Default value for FS_PERMISSIONS_UMASK_KEY
`static java.lang.String`	`FS_PERMISSIONS_UMASK_KEY`	Default umask for files created in HDFS
`static int`	`HA_FC_CLI_CHECK_TIMEOUT_DEFAULT`
`static java.lang.String`	`HA_FC_CLI_CHECK_TIMEOUT_KEY`
`static int`	`HA_FC_ELECTOR_ZK_OP_RETRIES_DEFAULT`
`static java.lang.String`	`HA_FC_ELECTOR_ZK_OP_RETRIES_KEY`	number of zookeeper operation retry times in ActiveStandbyElector
`static java.lang.String`	`HA_FC_GRACEFUL_FENCE_CONNECTION_RETRIES`
`static int`	`HA_FC_GRACEFUL_FENCE_CONNECTION_RETRIES_DEFAULT`
`static int`	`HA_FC_GRACEFUL_FENCE_TIMEOUT_DEFAULT`
`static java.lang.String`	`HA_FC_GRACEFUL_FENCE_TIMEOUT_KEY`
`static int`	`HA_FC_NEW_ACTIVE_TIMEOUT_DEFAULT`
`static java.lang.String`	`HA_FC_NEW_ACTIVE_TIMEOUT_KEY`
`static long`	`HA_HM_CHECK_INTERVAL_DEFAULT`
`static java.lang.String`	`HA_HM_CHECK_INTERVAL_KEY`
`static long`	`HA_HM_CONNECT_RETRY_INTERVAL_DEFAULT`
`static java.lang.String`	`HA_HM_CONNECT_RETRY_INTERVAL_KEY`	HA health monitor and failover controller.
`static int`	`HA_HM_RPC_CONNECT_MAX_RETRIES_DEFAULT`
`static java.lang.String`	`HA_HM_RPC_CONNECT_MAX_RETRIES_KEY`	How many time to retry connecting to the service.
`static int`	`HA_HM_RPC_TIMEOUT_DEFAULT`
`static java.lang.String`	`HA_HM_RPC_TIMEOUT_KEY`	How often to retry connecting to the service.
`static long`	`HA_HM_SLEEP_AFTER_DISCONNECT_DEFAULT`
`static java.lang.String`	`HA_HM_SLEEP_AFTER_DISCONNECT_KEY`
`static java.lang.String`	`HADOOP_DOMAINNAME_RESOLVER_IMPL`	Default domain name resolver for hadoop to use.
`static java.lang.Class<? extends DomainNameResolver>`	`HADOOP_DOMAINNAME_RESOLVER_IMPL_DEFAULT`
`static java.lang.String`	`HADOOP_HTTP_STATIC_USER`	Static user web-filter properties.
`static java.lang.String`	`HADOOP_JETTY_LOGS_SERVE_ALIASES`	Enable/Disable aliases serving from jetty
`static java.lang.String`	`HADOOP_METRICS_JVM_USE_THREAD_MXBEAN`	Whether or not ThreadMXBean is used for getting thread info in JvmMetrics, ThreadGroup approach is preferred for better performance.
`static boolean`	`HADOOP_METRICS_JVM_USE_THREAD_MXBEAN_DEFAULT`
`static boolean`	`HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_ENABLED_DEFAULT`
`static java.lang.String`	`HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_ENABLED_KEY`
`static int`	`HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_THRESHOLD_MS_DEFAULT`
`static java.lang.String`	`HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_THRESHOLD_MS_KEY`
`static java.lang.String`	`HADOOP_SECURITY_RESOLVER_IMPL`
`static java.lang.String`	`HADOOP_SECURITY_SERVICE_AUTHORIZATION_DATANODE_LIFELINE`
`static java.lang.String`	`HADOOP_SECURITY_SERVICE_AUTHORIZATION_DEFAULT_ACL`	Service Authorization
`static java.lang.String`	`HADOOP_SECURITY_SERVICE_AUTHORIZATION_DEFAULT_BLOCKED_ACL`
`static java.lang.String`	`HADOOP_SECURITY_SERVICE_AUTHORIZATION_GENERIC_REFRESH`
`static java.lang.String`	`HADOOP_SECURITY_SERVICE_AUTHORIZATION_GET_USER_MAPPINGS`
`static java.lang.String`	`HADOOP_SECURITY_SERVICE_AUTHORIZATION_RECONFIGURATION`
`static java.lang.String`	`HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_CALLQUEUE`
`static java.lang.String`	`HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_POLICY`
`static java.lang.String`	`HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_USER_MAPPINGS`
`static java.lang.String`	`HADOOP_SECURITY_SERVICE_AUTHORIZATION_TRACING`
`static java.lang.String`	`HADOOP_SECURITY_TOKEN_SERVICE_USE_IP`
`static boolean`	`HADOOP_SECURITY_TOKEN_SERVICE_USE_IP_DEFAULT`
`static long`	`HADOOP_SECURITY_UID_NAME_CACHE_TIMEOUT_DEFAULT`
`static java.lang.String`	`HADOOP_SECURITY_UID_NAME_CACHE_TIMEOUT_KEY`
`static java.lang.String`	`HADOOP_TMP_DIR`	default hadoop temp dir on local system: "hadoop.tmp.dir".
`static java.lang.String`	`HADOOP_USER_GROUP_METRICS_PERCENTILES_INTERVALS`
`static java.lang.String`	`HADOOP_USER_GROUP_STATIC_OVERRIDES`	User->groups static mapping to override the groups lookup
`static java.lang.String`	`HADOOP_USER_GROUP_STATIC_OVERRIDES_DEFAULT`
`static java.lang.String`	`HADOOP_USERS_ACL`
`static java.lang.String`	`HADOOP_USERS_ACL_FORCE_INIT`
`static boolean`	`HADOOP_USERS_ACL_FORCE_INIT_DEFAULT`
`static int`	`IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_DEFAULT`	Default value for IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_KEY
`static java.lang.String`	`IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_KEY`	Internal buffer size for Lz4 compressor/decompressors
`static boolean`	`IO_COMPRESSION_CODEC_LZ4_USELZ4HC_DEFAULT`	Default value for IO_COMPRESSION_CODEC_USELZ4HC_KEY
`static java.lang.String`	`IO_COMPRESSION_CODEC_LZ4_USELZ4HC_KEY`	Use lz4hc(slow but with high compression ratio) for lz4 compression
`static int`	`IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_DEFAULT`	Default value for IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_KEY
`static java.lang.String`	`IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_KEY`	Internal buffer size for Lzo compressor/decompressors
`static int`	`IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_DEFAULT`	Default value for IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_KEY
`static java.lang.String`	`IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_KEY`	Internal buffer size for Snappy compressor/decompressors
`static int`	`IO_COMPRESSION_CODEC_ZSTD_BUFFER_SIZE_DEFAULT`	ZStandard buffer size a value of 0 means use the recommended zstd buffer size that the library recommends.
`static java.lang.String`	`IO_COMPRESSION_CODEC_ZSTD_BUFFER_SIZE_KEY`	ZStandard buffer size.
`static int`	`IO_COMPRESSION_CODEC_ZSTD_LEVEL_DEFAULT`	Default value for IO_COMPRESSION_CODEC_ZSTD_LEVEL_KEY.
`static java.lang.String`	`IO_COMPRESSION_CODEC_ZSTD_LEVEL_KEY`	ZStandard compression level.
`static java.lang.String`	`IO_COMPRESSION_CODECS_KEY`	Supported compression codec classes
`static java.lang.String`	`IOSTATISTICS_LOGGING_LEVEL`	logging level for IOStatistics (debug or info).
`static java.lang.String`	`IOSTATISTICS_LOGGING_LEVEL_DEBUG`	DEBUG logging level for IOStatistics logging.
`static java.lang.String`	`IOSTATISTICS_LOGGING_LEVEL_DEFAULT`	Default value for IOStatistics logging level.
`static java.lang.String`	`IOSTATISTICS_LOGGING_LEVEL_ERROR`	ERROR logging level for IOStatistics logging.
`static java.lang.String`	`IOSTATISTICS_LOGGING_LEVEL_INFO`	INFO logging level for IOStatistics logging.
`static java.lang.String`	`IOSTATISTICS_LOGGING_LEVEL_WARN`	WARN logging level for IOStatistics logging.
`static java.lang.String`	`IOSTATISTICS_THREAD_LEVEL_ENABLED`	Thread-level IOStats Support.
`static boolean`	`IOSTATISTICS_THREAD_LEVEL_ENABLED_DEFAULT`	Default value for Thread-level IOStats Support is true.
`static java.lang.String`	`IPC_BACKOFF_ENABLE`
`static boolean`	`IPC_BACKOFF_ENABLE_DEFAULT`
`static java.lang.String`	`IPC_CALLQUEUE_CAPACITY_WEIGHTS_KEY`	Callqueue subqueue capacity weights.
`static java.lang.String`	`IPC_CALLQUEUE_IMPL_KEY`
`static java.lang.String`	`IPC_CALLQUEUE_SERVER_FAILOVER_ENABLE`
`static boolean`	`IPC_CALLQUEUE_SERVER_FAILOVER_ENABLE_DEFAULT`
`static int`	`IPC_CLIENT_ASYNC_CALLS_MAX_DEFAULT`
`static java.lang.String`	`IPC_CLIENT_ASYNC_CALLS_MAX_KEY`
`static boolean`	`IPC_CLIENT_BIND_WILDCARD_ADDR_DEFAULT`
`static java.lang.String`	`IPC_CLIENT_BIND_WILDCARD_ADDR_KEY`
`static int`	`IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SASL_DEFAULT`
`static java.lang.String`	`IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SASL_KEY`
`static int`	`IPC_CLIENT_CONNECTION_IDLESCANINTERVAL_DEFAULT`	Default value for IPC_SERVER_CONNECTION_IDLE_SCAN_INTERVAL_KEY
`static java.lang.String`	`IPC_CLIENT_CONNECTION_IDLESCANINTERVAL_KEY`	How often the server scans for idle connections
`static boolean`	`IPC_CLIENT_FALLBACK_TO_SIMPLE_AUTH_ALLOWED_DEFAULT`
`static java.lang.String`	`IPC_CLIENT_FALLBACK_TO_SIMPLE_AUTH_ALLOWED_KEY`
`static boolean`	`IPC_CLIENT_PING_DEFAULT`	Default value of IPC_CLIENT_PING_KEY
`static java.lang.String`	`IPC_CLIENT_PING_KEY`	Enables pings from RPC client to the server
`static int`	`IPC_CLIENT_RPC_TIMEOUT_DEFAULT`	Default value for IPC_CLIENT_RPC_TIMEOUT_KEY.
`static java.lang.String`	`IPC_CLIENT_RPC_TIMEOUT_KEY`	Timeout value for RPC client on waiting for response.
`static java.lang.String`	`IPC_COST_PROVIDER_KEY`
`static java.lang.String`	`IPC_IDENTITY_PROVIDER_KEY`
`static java.lang.String`	`IPC_MAXIMUM_DATA_LENGTH`	Max request size a server will accept.
`static int`	`IPC_MAXIMUM_DATA_LENGTH_DEFAULT`	Default value for IPC_MAXIMUM_DATA_LENGTH.
`static java.lang.String`	`IPC_MAXIMUM_RESPONSE_LENGTH`	Max response size a client will accept.
`static int`	`IPC_MAXIMUM_RESPONSE_LENGTH_DEFAULT`	Default value for IPC_MAXIMUM_RESPONSE_LENGTH.
`static java.lang.String`	`IPC_NAMESPACE`	CallQueue related settings.
`static int`	`IPC_PING_INTERVAL_DEFAULT`	Default value for IPC_PING_INTERVAL_KEY
`static java.lang.String`	`IPC_PING_INTERVAL_KEY`	How often does RPC client send pings to RPC server
`static java.lang.String`	`IPC_SCHEDULER_IMPL_KEY`
`static int`	`IPC_SCHEDULER_PRIORITY_LEVELS_DEFAULT_KEY`
`static java.lang.String`	`IPC_SCHEDULER_PRIORITY_LEVELS_KEY`	IPC scheduler priority levels.
`static int`	`IPC_SERVER_HANDLER_QUEUE_SIZE_DEFAULT`	Default value for IPC_SERVER_HANDLER_QUEUE_SIZE_KEY
`static java.lang.String`	`IPC_SERVER_HANDLER_QUEUE_SIZE_KEY`	How many calls per handler are allowed in the queue.
`static int`	`IPC_SERVER_RPC_MAX_RESPONSE_SIZE_DEFAULT`	Default value for IPC_SERVER_RPC_MAX_RESPONSE_SIZE_KEY
`static java.lang.String`	`IPC_SERVER_RPC_MAX_RESPONSE_SIZE_KEY`	Responses larger than this will be logged
`static int`	`IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE_DEFAULT`	Default value for IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE
`static java.lang.String`	`IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE_KEY`	Number of pending connections that may be queued per socket reader
`static int`	`IPC_SERVER_RPC_READ_THREADS_DEFAULT`	Default value for IPC_SERVER_RPC_READ_THREADS_KEY
`static java.lang.String`	`IPC_SERVER_RPC_READ_THREADS_KEY`	Number of threads in RPC server reading from the socket
`static java.lang.String`	`KERBEROS_TICKET_CACHE_PATH`
`static java.lang.String`	`NET_TOPOLOGY_CONFIGURED_NODE_MAPPING_KEY`	This is for specifying the implementation for the mappings from hostnames to the racks they belong to
`static java.lang.String`	`NFS_EXPORTS_ALLOWED_HOSTS_KEY`
`static java.lang.String`	`NFS_EXPORTS_ALLOWED_HOSTS_KEY_DEFAULT`
`static java.lang.String`	`NFS_EXPORTS_ALLOWED_HOSTS_SEPARATOR`	Allowed hosts for nfs exports
`static java.lang.String`	`RPC_METRICS_PERCENTILES_INTERVALS_KEY`
`static java.lang.String`	`RPC_METRICS_QUANTILE_ENABLE`
`static boolean`	`RPC_METRICS_QUANTILE_ENABLE_DEFAULT`
`static java.lang.String`	`RPC_METRICS_TIME_UNIT`
`static java.lang.String`	`SECURITY_CLIENT_DATANODE_PROTOCOL_ACL`
`static java.lang.String`	`SECURITY_CLIENT_PROTOCOL_ACL`
`static java.lang.String`	`SECURITY_DATANODE_PROTOCOL_ACL`
`static java.lang.String`	`SECURITY_HA_SERVICE_PROTOCOL_ACL`
`static java.lang.String`	`SECURITY_INTER_DATANODE_PROTOCOL_ACL`
`static java.lang.String`	`SECURITY_INTERQJOURNAL_SERVICE_PROTOCOL_ACL`
`static java.lang.String`	`SECURITY_NAMENODE_PROTOCOL_ACL`
`static java.lang.String`	`SECURITY_QJOURNAL_SERVICE_PROTOCOL_ACL`
`static java.lang.String`	`SECURITY_ROUTER_ADMIN_PROTOCOL_ACL`
`static java.lang.String`	`SECURITY_ZKFC_PROTOCOL_ACL`
`static java.lang.String`	`ZK_ACL`	ACL for the ZooKeeper ensemble.
`static java.lang.String`	`ZK_ACL_DEFAULT`
`static java.lang.String`	`ZK_ADDRESS`	Address of the ZooKeeper ensemble.
`static java.lang.String`	`ZK_AUTH`	Authentication for the ZooKeeper ensemble.
`static java.lang.String`	`ZK_CLIENT_SSL_ENABLED`	SSL enablement for all Hadoop->ZK communication.
`static java.lang.String`	`ZK_KERBEROS_KEYTAB`	Kerberos keytab for zookeeper connection.
`static java.lang.String`	`ZK_KERBEROS_PRINCIPAL`	Kerberos principal name for zookeeper connection.
`static java.lang.String`	`ZK_NUM_RETRIES`	Maximum number of retries for a ZooKeeper operation.
`static int`	`ZK_NUM_RETRIES_DEFAULT`
`static java.lang.String`	`ZK_PREFIX`
`static java.lang.String`	`ZK_RETRY_INTERVAL_MS`	How often to retry a ZooKeeper operation in milliseconds.
`static int`	`ZK_RETRY_INTERVAL_MS_DEFAULT`
`static java.lang.String`	`ZK_SERVER_PRINCIPAL`	Principal name for zookeeper servers.
`static java.lang.String`	`ZK_SSL_KEYSTORE_LOCATION`	Keystore location for ZooKeeper client connection over SSL.
`static java.lang.String`	`ZK_SSL_KEYSTORE_PASSWORD`	Keystore password for ZooKeeper client connection over SSL.
`static java.lang.String`	`ZK_SSL_TRUSTSTORE_LOCATION`	Truststore location for ZooKeeper client connection over SSL.
`static java.lang.String`	`ZK_SSL_TRUSTSTORE_PASSWORD`	Truststore password for ZooKeeper client connection over SSL.
`static java.lang.String`	`ZK_TIMEOUT_MS`	Timeout for a ZooKeeper operation in ZooKeeper in milliseconds.
`static int`	`ZK_TIMEOUT_MS_DEFAULT`

Fields inherited from class org.apache.hadoop.fs.CommonConfigurationKeysPublic
FS_AUTOMATIC_CLOSE_DEFAULT, FS_AUTOMATIC_CLOSE_KEY, FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_DEFAULT, FS_CLIENT_RESOLVE_REMOTE_SYMLINKS_KEY, FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED, FS_CLIENT_TOPOLOGY_RESOLUTION_ENABLED_DEFAULT, FS_CREATION_PARALLEL_COUNT, FS_CREATION_PARALLEL_COUNT_DEFAULT, FS_DEFAULT_NAME_DEFAULT, FS_DEFAULT_NAME_KEY, FS_DF_INTERVAL_DEFAULT, FS_DF_INTERVAL_KEY, FS_DU_INTERVAL_DEFAULT, FS_DU_INTERVAL_KEY, FS_FILE_IMPL_KEY, FS_FTP_HOST_KEY, FS_FTP_HOST_PORT_KEY, FS_GETSPACEUSED_CLASSNAME, FS_GETSPACEUSED_JITTER_DEFAULT, FS_GETSPACEUSED_JITTER_KEY, FS_LOCAL_BLOCK_SIZE_DEFAULT, FS_PROTECTED_DIRECTORIES, FS_TRASH_CHECKPOINT_INTERVAL_DEFAULT, FS_TRASH_CHECKPOINT_INTERVAL_KEY, FS_TRASH_CLEAN_TRASHROOT_ENABLE_DEFAULT, FS_TRASH_CLEAN_TRASHROOT_ENABLE_KEY, FS_TRASH_INTERVAL_DEFAULT, FS_TRASH_INTERVAL_KEY, HADOOP_CALLER_CONTEXT_ENABLED_DEFAULT, HADOOP_CALLER_CONTEXT_ENABLED_KEY, HADOOP_CALLER_CONTEXT_MAX_SIZE_DEFAULT, HADOOP_CALLER_CONTEXT_MAX_SIZE_KEY, HADOOP_CALLER_CONTEXT_SEPARATOR_DEFAULT, HADOOP_CALLER_CONTEXT_SEPARATOR_KEY, HADOOP_CALLER_CONTEXT_SIGNATURE_MAX_SIZE_DEFAULT, HADOOP_CALLER_CONTEXT_SIGNATURE_MAX_SIZE_KEY, HADOOP_CUSTOM_TAGS, HADOOP_HTTP_AUTHENTICATION_TYPE, HADOOP_HTTP_IDLE_TIMEOUT_MS_DEFAULT, HADOOP_HTTP_IDLE_TIMEOUT_MS_KEY, HADOOP_HTTP_LOGS_ENABLED, HADOOP_HTTP_LOGS_ENABLED_DEFAULT, HADOOP_HTTP_METRICS_ENABLED, HADOOP_HTTP_METRICS_ENABLED_DEFAULT, HADOOP_KERBEROS_KEYTAB_LOGIN_AUTORENEWAL_ENABLED, HADOOP_KERBEROS_KEYTAB_LOGIN_AUTORENEWAL_ENABLED_DEFAULT, HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN, HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN_DEFAULT, HADOOP_PROMETHEUS_ENABLED, HADOOP_PROMETHEUS_ENABLED_DEFAULT, HADOOP_RPC_PROTECTION, HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_DEFAULT, HADOOP_RPC_SOCKET_FACTORY_CLASS_DEFAULT_KEY, HADOOP_SECURITY_AUTH_TO_LOCAL, HADOOP_SECURITY_AUTH_TO_LOCAL_MECHANISM, HADOOP_SECURITY_AUTHENTICATION, HADOOP_SECURITY_AUTHORIZATION, HADOOP_SECURITY_CREDENTIAL_CLEAR_TEXT_FALLBACK, HADOOP_SECURITY_CREDENTIAL_CLEAR_TEXT_FALLBACK_DEFAULT, HADOOP_SECURITY_CREDENTIAL_PASSWORD_FILE_KEY, HADOOP_SECURITY_CREDENTIAL_PROVIDER_PATH, HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_DEFAULT, HADOOP_SECURITY_CRYPTO_BUFFER_SIZE_KEY, HADOOP_SECURITY_CRYPTO_CIPHER_SUITE_DEFAULT, HADOOP_SECURITY_CRYPTO_CIPHER_SUITE_KEY, HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_AES_CTR_NOPADDING_DEFAULT, HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_AES_CTR_NOPADDING_KEY, HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_KEY_PREFIX, HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_SM4_CTR_NOPADDING_DEFAULT, HADOOP_SECURITY_CRYPTO_CODEC_CLASSES_SM4_CTR_NOPADDING_KEY, HADOOP_SECURITY_CRYPTO_JCE_PROVIDER_KEY, HADOOP_SECURITY_CRYPTO_JCEKS_KEY_SERIALFILTER, HADOOP_SECURITY_DNS_INTERFACE_KEY, HADOOP_SECURITY_DNS_NAMESERVER_KEY, HADOOP_SECURITY_GROUP_MAPPING, HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_DEFAULT, HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_KEY, HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_SECS, HADOOP_SECURITY_GROUP_SHELL_COMMAND_TIMEOUT_SECS_DEFAULT, HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD, HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_DEFAULT, HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_THREADS, HADOOP_SECURITY_GROUPS_CACHE_BACKGROUND_RELOAD_THREADS_DEFAULT, HADOOP_SECURITY_GROUPS_CACHE_SECS, HADOOP_SECURITY_GROUPS_CACHE_SECS_DEFAULT, HADOOP_SECURITY_GROUPS_CACHE_WARN_AFTER_MS, HADOOP_SECURITY_GROUPS_CACHE_WARN_AFTER_MS_DEFAULT, HADOOP_SECURITY_GROUPS_NEGATIVE_CACHE_SECS, HADOOP_SECURITY_GROUPS_NEGATIVE_CACHE_SECS_DEFAULT, HADOOP_SECURITY_IMPERSONATION_PROVIDER_CLASS, HADOOP_SECURITY_INSTRUMENTATION_REQUIRES_ADMIN, HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_DEFAULT, HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_KEY, HADOOP_SECURITY_JAVA_SECURITY_JAR_PATH, HADOOP_SECURITY_KEY_DEFAULT_BITLENGTH_DEFAULT, HADOOP_SECURITY_KEY_DEFAULT_BITLENGTH_KEY, HADOOP_SECURITY_KEY_DEFAULT_CIPHER_DEFAULT, HADOOP_SECURITY_KEY_DEFAULT_CIPHER_KEY, HADOOP_SECURITY_KEY_PROVIDER_PATH, HADOOP_SECURITY_OPENSSL_ENGINE_ID_KEY, HADOOP_SECURITY_SASL_PROPS_RESOLVER_CLASS, HADOOP_SECURITY_SECRET_MANAGER_KEY_GENERATOR_ALGORITHM_DEFAULT, HADOOP_SECURITY_SECRET_MANAGER_KEY_GENERATOR_ALGORITHM_KEY, HADOOP_SECURITY_SECRET_MANAGER_KEY_LENGTH_DEFAULT, HADOOP_SECURITY_SECRET_MANAGER_KEY_LENGTH_KEY, HADOOP_SECURITY_SECURE_RANDOM_DEVICE_FILE_PATH_DEFAULT, HADOOP_SECURITY_SECURE_RANDOM_DEVICE_FILE_PATH_KEY, HADOOP_SECURITY_SECURE_RANDOM_IMPL_KEY, HADOOP_SECURITY_SENSITIVE_CONFIG_KEYS, HADOOP_SECURITY_SENSITIVE_CONFIG_KEYS_DEFAULT, HADOOP_SECURITY_SERVICE_USER_NAME_KEY, HADOOP_SECURITY_TOKEN_MECHANISM, HADOOP_SHELL_MISSING_DEFAULT_FS_WARNING_DEFAULT, HADOOP_SHELL_MISSING_DEFAULT_FS_WARNING_KEY, HADOOP_SHELL_SAFELY_DELETE_LIMIT_NUM_FILES, HADOOP_SHELL_SAFELY_DELETE_LIMIT_NUM_FILES_DEFAULT, HADOOP_SOCKS_SERVER_KEY, HADOOP_SYSTEM_TAGS, HADOOP_TAGS_CUSTOM, HADOOP_TAGS_SYSTEM, HADOOP_TOKEN_FILES, HADOOP_TOKENS, HADOOP_UTIL_HASH_TYPE_DEFAULT, HADOOP_UTIL_HASH_TYPE_KEY, HADOOP_WEBAPPS_CUSTOM_HEADERS_PATH, IO_COMPRESSION_CODEC_LZO_CLASS_KEY, IO_FILE_BUFFER_SIZE_DEFAULT, IO_FILE_BUFFER_SIZE_KEY, IO_MAP_INDEX_INTERVAL_DEFAULT, IO_MAP_INDEX_INTERVAL_KEY, IO_MAP_INDEX_SKIP_DEFAULT, IO_MAP_INDEX_SKIP_KEY, IO_MAPFILE_BLOOM_ERROR_RATE_DEFAULT, IO_MAPFILE_BLOOM_ERROR_RATE_KEY, IO_MAPFILE_BLOOM_SIZE_DEFAULT, IO_MAPFILE_BLOOM_SIZE_KEY, IO_SEQFILE_COMPRESS_BLOCKSIZE_DEFAULT, IO_SEQFILE_COMPRESS_BLOCKSIZE_KEY, IO_SERIALIZATIONS_KEY, IO_SKIP_CHECKSUM_ERRORS_DEFAULT, IO_SKIP_CHECKSUM_ERRORS_KEY, IO_SORT_FACTOR_DEFAULT, IO_SORT_FACTOR_KEY, IO_SORT_MB_DEFAULT, IO_SORT_MB_KEY, IPC_CLIENT_CONNECT_MAX_RETRIES_DEFAULT, IPC_CLIENT_CONNECT_MAX_RETRIES_KEY, IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_DEFAULT, IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_KEY, IPC_CLIENT_CONNECT_RETRY_INTERVAL_DEFAULT, IPC_CLIENT_CONNECT_RETRY_INTERVAL_KEY, IPC_CLIENT_CONNECT_TIMEOUT_DEFAULT, IPC_CLIENT_CONNECT_TIMEOUT_KEY, IPC_CLIENT_CONNECTION_MAXIDLETIME_DEFAULT, IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY, IPC_CLIENT_IDLETHRESHOLD_DEFAULT, IPC_CLIENT_IDLETHRESHOLD_KEY, IPC_CLIENT_KILL_MAX_DEFAULT, IPC_CLIENT_KILL_MAX_KEY, IPC_CLIENT_LOW_LATENCY, IPC_CLIENT_LOW_LATENCY_DEFAULT, IPC_CLIENT_TCPNODELAY_DEFAULT, IPC_CLIENT_TCPNODELAY_KEY, IPC_SERVER_LISTEN_QUEUE_SIZE_DEFAULT, IPC_SERVER_LISTEN_QUEUE_SIZE_KEY, IPC_SERVER_LOG_SLOW_RPC, IPC_SERVER_LOG_SLOW_RPC_DEFAULT, IPC_SERVER_LOG_SLOW_RPC_THRESHOLD_MS_DEFAULT, IPC_SERVER_LOG_SLOW_RPC_THRESHOLD_MS_KEY, IPC_SERVER_MAX_CONNECTIONS_DEFAULT, IPC_SERVER_MAX_CONNECTIONS_KEY, IPC_SERVER_METRICS_UPDATE_RUNNER_INTERVAL, IPC_SERVER_METRICS_UPDATE_RUNNER_INTERVAL_DEFAULT, IPC_SERVER_PURGE_INTERVAL_MINUTES_DEFAULT, IPC_SERVER_PURGE_INTERVAL_MINUTES_KEY, IPC_SERVER_REUSEADDR_DEFAULT, IPC_SERVER_REUSEADDR_KEY, IPC_SERVER_TCPNODELAY_DEFAULT, IPC_SERVER_TCPNODELAY_KEY, JMX_NAN_FILTER, JMX_NAN_FILTER_DEFAULT, KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_DEFAULT, KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_MS, KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK, KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK_DEFAULT, KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS, KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS_DEFAULT, KMS_CLIENT_ENC_KEY_CACHE_SIZE, KMS_CLIENT_ENC_KEY_CACHE_SIZE_DEFAULT, KMS_CLIENT_FAILOVER_MAX_RETRIES_KEY, KMS_CLIENT_FAILOVER_SLEEP_BASE_MILLIS_DEFAULT, KMS_CLIENT_FAILOVER_SLEEP_BASE_MILLIS_KEY, KMS_CLIENT_FAILOVER_SLEEP_MAX_MILLIS_DEFAULT, KMS_CLIENT_FAILOVER_SLEEP_MAX_MILLIS_KEY, KMS_CLIENT_TIMEOUT_DEFAULT, KMS_CLIENT_TIMEOUT_SECONDS, LOG_LEVEL_AUTHENTICATOR_CLASS, NET_DEPENDENCY_SCRIPT_FILE_NAME_KEY, NET_TOPOLOGY_IMPL_KEY, NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY, NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY, NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_DEFAULT, NET_TOPOLOGY_SCRIPT_NUMBER_ARGS_KEY, NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY, SEQ_IO_SORT_FACTOR_DEFAULT, SEQ_IO_SORT_FACTOR_KEY, SEQ_IO_SORT_MB_DEFAULT, SEQ_IO_SORT_MB_KEY, SERVICE_SHUTDOWN_TIMEOUT, SERVICE_SHUTDOWN_TIMEOUT_DEFAULT, TFILE_FS_INPUT_BUFFER_SIZE_DEFAULT, TFILE_FS_INPUT_BUFFER_SIZE_KEY, TFILE_FS_OUTPUT_BUFFER_SIZE_DEFAULT, TFILE_FS_OUTPUT_BUFFER_SIZE_KEY, TFILE_IO_CHUNK_SIZE_DEFAULT, TFILE_IO_CHUNK_SIZE_KEY

Constructor Summary

Constructors
Constructor Description

CommonConfigurationKeys()

Constructors
Constructor	Description
`CommonConfigurationKeys()`

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - FS_HOME_DIR_KEY
```
public static final java.lang.String FS_HOME_DIR_KEY
```
    Default location for user home directories
    
    See Also:
    
    Constant Field Values
  - FS_HOME_DIR_DEFAULT
```
public static final java.lang.String FS_HOME_DIR_DEFAULT
```
    Default value for FS_HOME_DIR_KEY
    
    See Also:
    
    Constant Field Values
  - FS_PERMISSIONS_UMASK_KEY
```
public static final java.lang.String FS_PERMISSIONS_UMASK_KEY
```
    Default umask for files created in HDFS
    
    See Also:
    
    Constant Field Values
  - FS_PERMISSIONS_UMASK_DEFAULT
```
public static final int FS_PERMISSIONS_UMASK_DEFAULT
```
    Default value for FS_PERMISSIONS_UMASK_KEY
    
    See Also:
    
    Constant Field Values
  - FS_CACHE_LRU_ENABLE
```
public static final java.lang.String FS_CACHE_LRU_ENABLE
```
    Enable/Disable LRU cache for the FileSystem entries
    
    See Also:
    
    Constant Field Values
  - DEFAULT_FS_CACHE_LRU_ENABLE
```
public static final boolean DEFAULT_FS_CACHE_LRU_ENABLE
```
    See Also:
    
    Constant Field Values
  - FS_CACHE_LRU_ENTRIES_MAX_SIZE
```
public static final java.lang.String FS_CACHE_LRU_ENTRIES_MAX_SIZE
```
    The maximum number of entries the FileSystem cache may contain
    
    See Also:
    
    Constant Field Values
  - DEFAULT_FS_CACHE_LRU_ENTRIES_MAX_SIZE
```
public static final int DEFAULT_FS_CACHE_LRU_ENTRIES_MAX_SIZE
```
    See Also:
    
    Constant Field Values
  - FS_CACHE_LRU_ENTRIES_EXPIRE_AFTER_ACCESS_MS
```
public static final java.lang.String FS_CACHE_LRU_ENTRIES_EXPIRE_AFTER_ACCESS_MS
```
    The length of time after an entry is last accessed that it should be automatically removed from the FileSystem cache
    
    See Also:
    
    Constant Field Values
  - DEFAULT_FS_CACHE_LRU_ENTRIES_EXPIRE_AFTER_ACCESS_MS
```
public static int DEFAULT_FS_CACHE_LRU_ENTRIES_EXPIRE_AFTER_ACCESS_MS
```
  - IPC_PING_INTERVAL_KEY
```
public static final java.lang.String IPC_PING_INTERVAL_KEY
```
    How often does RPC client send pings to RPC server
    
    See Also:
    
    Constant Field Values
  - IPC_PING_INTERVAL_DEFAULT
```
public static final int IPC_PING_INTERVAL_DEFAULT
```
    Default value for IPC_PING_INTERVAL_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_PING_KEY
```
public static final java.lang.String IPC_CLIENT_PING_KEY
```
    Enables pings from RPC client to the server
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_PING_DEFAULT
```
public static final boolean IPC_CLIENT_PING_DEFAULT
```
    Default value of IPC_CLIENT_PING_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_RPC_TIMEOUT_KEY
```
public static final java.lang.String IPC_CLIENT_RPC_TIMEOUT_KEY
```
    Timeout value for RPC client on waiting for response.
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_RPC_TIMEOUT_DEFAULT
```
public static final int IPC_CLIENT_RPC_TIMEOUT_DEFAULT
```
    Default value for IPC_CLIENT_RPC_TIMEOUT_KEY.
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_RPC_MAX_RESPONSE_SIZE_KEY
```
public static final java.lang.String IPC_SERVER_RPC_MAX_RESPONSE_SIZE_KEY
```
    Responses larger than this will be logged
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_RPC_MAX_RESPONSE_SIZE_DEFAULT
```
public static final int IPC_SERVER_RPC_MAX_RESPONSE_SIZE_DEFAULT
```
    Default value for IPC_SERVER_RPC_MAX_RESPONSE_SIZE_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_RPC_READ_THREADS_KEY
```
public static final java.lang.String IPC_SERVER_RPC_READ_THREADS_KEY
```
    Number of threads in RPC server reading from the socket
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_RPC_READ_THREADS_DEFAULT
```
public static final int IPC_SERVER_RPC_READ_THREADS_DEFAULT
```
    Default value for IPC_SERVER_RPC_READ_THREADS_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE_KEY
```
public static final java.lang.String IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE_KEY
```
    Number of pending connections that may be queued per socket reader
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE_DEFAULT
```
public static final int IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE_DEFAULT
```
    Default value for IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE
    
    See Also:
    
    Constant Field Values
  - IPC_MAXIMUM_DATA_LENGTH
```
public static final java.lang.String IPC_MAXIMUM_DATA_LENGTH
```
    Max request size a server will accept.
    
    See Also:
    
    Constant Field Values
  - IPC_MAXIMUM_DATA_LENGTH_DEFAULT
```
public static final int IPC_MAXIMUM_DATA_LENGTH_DEFAULT
```
    Default value for IPC_MAXIMUM_DATA_LENGTH.
    
    See Also:
    
    Constant Field Values
  - IPC_MAXIMUM_RESPONSE_LENGTH
```
public static final java.lang.String IPC_MAXIMUM_RESPONSE_LENGTH
```
    Max response size a client will accept.
    
    See Also:
    
    Constant Field Values
  - IPC_MAXIMUM_RESPONSE_LENGTH_DEFAULT
```
public static final int IPC_MAXIMUM_RESPONSE_LENGTH_DEFAULT
```
    Default value for IPC_MAXIMUM_RESPONSE_LENGTH.
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_HANDLER_QUEUE_SIZE_KEY
```
public static final java.lang.String IPC_SERVER_HANDLER_QUEUE_SIZE_KEY
```
    How many calls per handler are allowed in the queue.
    
    See Also:
    
    Constant Field Values
  - IPC_SERVER_HANDLER_QUEUE_SIZE_DEFAULT
```
public static final int IPC_SERVER_HANDLER_QUEUE_SIZE_DEFAULT
```
    Default value for IPC_SERVER_HANDLER_QUEUE_SIZE_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_NAMESPACE
```
public static final java.lang.String IPC_NAMESPACE
```
    CallQueue related settings. These are not used directly, but rather combined with a namespace and port. For instance: IPC_NAMESPACE + ".8020." + IPC_CALLQUEUE_IMPL_KEY
    
    See Also:
    
    Constant Field Values
  - IPC_CALLQUEUE_IMPL_KEY
```
public static final java.lang.String IPC_CALLQUEUE_IMPL_KEY
```
    See Also:
    
    Constant Field Values
  - IPC_SCHEDULER_IMPL_KEY
```
public static final java.lang.String IPC_SCHEDULER_IMPL_KEY
```
    See Also:
    
    Constant Field Values
  - IPC_IDENTITY_PROVIDER_KEY
```
public static final java.lang.String IPC_IDENTITY_PROVIDER_KEY
```
    See Also:
    
    Constant Field Values
  - IPC_COST_PROVIDER_KEY
```
public static final java.lang.String IPC_COST_PROVIDER_KEY
```
    See Also:
    
    Constant Field Values
  - IPC_BACKOFF_ENABLE
```
public static final java.lang.String IPC_BACKOFF_ENABLE
```
    See Also:
    
    Constant Field Values
  - IPC_BACKOFF_ENABLE_DEFAULT
```
public static final boolean IPC_BACKOFF_ENABLE_DEFAULT
```
    See Also:
    
    Constant Field Values
  - IPC_CALLQUEUE_SERVER_FAILOVER_ENABLE
```
public static final java.lang.String IPC_CALLQUEUE_SERVER_FAILOVER_ENABLE
```
    See Also:
    
    Constant Field Values
  - IPC_CALLQUEUE_SERVER_FAILOVER_ENABLE_DEFAULT
```
public static final boolean IPC_CALLQUEUE_SERVER_FAILOVER_ENABLE_DEFAULT
```
    See Also:
    
    Constant Field Values
  - IPC_CALLQUEUE_CAPACITY_WEIGHTS_KEY
```
public static final java.lang.String IPC_CALLQUEUE_CAPACITY_WEIGHTS_KEY
```
    Callqueue subqueue capacity weights.
    
    See Also:
    
    Constant Field Values
  - IPC_SCHEDULER_PRIORITY_LEVELS_KEY
```
public static final java.lang.String IPC_SCHEDULER_PRIORITY_LEVELS_KEY
```
    IPC scheduler priority levels.
    
    See Also:
    
    Constant Field Values
  - IPC_SCHEDULER_PRIORITY_LEVELS_DEFAULT_KEY
```
public static final int IPC_SCHEDULER_PRIORITY_LEVELS_DEFAULT_KEY
```
    See Also:
    
    Constant Field Values
  - NET_TOPOLOGY_CONFIGURED_NODE_MAPPING_KEY
```
public static final java.lang.String NET_TOPOLOGY_CONFIGURED_NODE_MAPPING_KEY
```
    This is for specifying the implementation for the mappings from hostnames to the racks they belong to
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODECS_KEY
```
public static final java.lang.String IO_COMPRESSION_CODECS_KEY
```
    Supported compression codec classes
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_KEY
```
public static final java.lang.String IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_KEY
```
    Internal buffer size for Lzo compressor/decompressors
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_DEFAULT
```
public static final int IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_DEFAULT
```
    Default value for IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_KEY
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_KEY
```
public static final java.lang.String IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_KEY
```
    Internal buffer size for Snappy compressor/decompressors
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_DEFAULT
```
public static final int IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_DEFAULT
```
    Default value for IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_KEY
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_ZSTD_LEVEL_KEY
```
public static final java.lang.String IO_COMPRESSION_CODEC_ZSTD_LEVEL_KEY
```
    ZStandard compression level.
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_ZSTD_LEVEL_DEFAULT
```
public static final int IO_COMPRESSION_CODEC_ZSTD_LEVEL_DEFAULT
```
    Default value for IO_COMPRESSION_CODEC_ZSTD_LEVEL_KEY.
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_ZSTD_BUFFER_SIZE_KEY
```
public static final java.lang.String IO_COMPRESSION_CODEC_ZSTD_BUFFER_SIZE_KEY
```
    ZStandard buffer size.
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_ZSTD_BUFFER_SIZE_DEFAULT
```
public static final int IO_COMPRESSION_CODEC_ZSTD_BUFFER_SIZE_DEFAULT
```
    ZStandard buffer size a value of 0 means use the recommended zstd buffer size that the library recommends.
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_KEY
```
public static final java.lang.String IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_KEY
```
    Internal buffer size for Lz4 compressor/decompressors
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_DEFAULT
```
public static final int IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_DEFAULT
```
    Default value for IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_KEY
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_LZ4_USELZ4HC_KEY
```
public static final java.lang.String IO_COMPRESSION_CODEC_LZ4_USELZ4HC_KEY
```
    Use lz4hc(slow but with high compression ratio) for lz4 compression
    
    See Also:
    
    Constant Field Values
  - IO_COMPRESSION_CODEC_LZ4_USELZ4HC_DEFAULT
```
public static final boolean IO_COMPRESSION_CODEC_LZ4_USELZ4HC_DEFAULT
```
    Default value for IO_COMPRESSION_CODEC_USELZ4HC_KEY
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SERVICE_AUTHORIZATION_DEFAULT_ACL
```
public static final java.lang.String HADOOP_SECURITY_SERVICE_AUTHORIZATION_DEFAULT_ACL
```
    Service Authorization
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SERVICE_AUTHORIZATION_DEFAULT_BLOCKED_ACL
```
public static final java.lang.String HADOOP_SECURITY_SERVICE_AUTHORIZATION_DEFAULT_BLOCKED_ACL
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_POLICY
```
public static final java.lang.String HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_POLICY
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SERVICE_AUTHORIZATION_GET_USER_MAPPINGS
```
public static final java.lang.String HADOOP_SECURITY_SERVICE_AUTHORIZATION_GET_USER_MAPPINGS
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_USER_MAPPINGS
```
public static final java.lang.String HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_USER_MAPPINGS
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_CALLQUEUE
```
public static final java.lang.String HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_CALLQUEUE
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SERVICE_AUTHORIZATION_GENERIC_REFRESH
```
public static final java.lang.String HADOOP_SECURITY_SERVICE_AUTHORIZATION_GENERIC_REFRESH
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SERVICE_AUTHORIZATION_TRACING
```
public static final java.lang.String HADOOP_SECURITY_SERVICE_AUTHORIZATION_TRACING
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SERVICE_AUTHORIZATION_DATANODE_LIFELINE
```
public static final java.lang.String HADOOP_SECURITY_SERVICE_AUTHORIZATION_DATANODE_LIFELINE
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_SERVICE_AUTHORIZATION_RECONFIGURATION
```
public static final java.lang.String HADOOP_SECURITY_SERVICE_AUTHORIZATION_RECONFIGURATION
```
    See Also:
    
    Constant Field Values
  - SECURITY_HA_SERVICE_PROTOCOL_ACL
```
public static final java.lang.String SECURITY_HA_SERVICE_PROTOCOL_ACL
```
    See Also:
    
    Constant Field Values
  - SECURITY_ZKFC_PROTOCOL_ACL
```
public static final java.lang.String SECURITY_ZKFC_PROTOCOL_ACL
```
    See Also:
    
    Constant Field Values
  - SECURITY_CLIENT_PROTOCOL_ACL
```
public static final java.lang.String SECURITY_CLIENT_PROTOCOL_ACL
```
    See Also:
    
    Constant Field Values
  - SECURITY_CLIENT_DATANODE_PROTOCOL_ACL
```
public static final java.lang.String SECURITY_CLIENT_DATANODE_PROTOCOL_ACL
```
    See Also:
    
    Constant Field Values
  - SECURITY_ROUTER_ADMIN_PROTOCOL_ACL
```
public static final java.lang.String SECURITY_ROUTER_ADMIN_PROTOCOL_ACL
```
    See Also:
    
    Constant Field Values
  - SECURITY_DATANODE_PROTOCOL_ACL
```
public static final java.lang.String SECURITY_DATANODE_PROTOCOL_ACL
```
    See Also:
    
    Constant Field Values
  - SECURITY_INTER_DATANODE_PROTOCOL_ACL
```
public static final java.lang.String SECURITY_INTER_DATANODE_PROTOCOL_ACL
```
    See Also:
    
    Constant Field Values
  - SECURITY_NAMENODE_PROTOCOL_ACL
```
public static final java.lang.String SECURITY_NAMENODE_PROTOCOL_ACL
```
    See Also:
    
    Constant Field Values
  - SECURITY_QJOURNAL_SERVICE_PROTOCOL_ACL
```
public static final java.lang.String SECURITY_QJOURNAL_SERVICE_PROTOCOL_ACL
```
    See Also:
    
    Constant Field Values
  - SECURITY_INTERQJOURNAL_SERVICE_PROTOCOL_ACL
```
public static final java.lang.String SECURITY_INTERQJOURNAL_SERVICE_PROTOCOL_ACL
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_TOKEN_SERVICE_USE_IP
```
public static final java.lang.String HADOOP_SECURITY_TOKEN_SERVICE_USE_IP
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_TOKEN_SERVICE_USE_IP_DEFAULT
```
public static final boolean HADOOP_SECURITY_TOKEN_SERVICE_USE_IP_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_USERS_ACL
```
public static final java.lang.String HADOOP_USERS_ACL
```
    See Also:
    
    Constant Field Values
  - HADOOP_USERS_ACL_FORCE_INIT
```
public static final java.lang.String HADOOP_USERS_ACL_FORCE_INIT
```
    See Also:
    
    Constant Field Values
  - HADOOP_USERS_ACL_FORCE_INIT_DEFAULT
```
public static final boolean HADOOP_USERS_ACL_FORCE_INIT_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_ENABLED_KEY
```
public static final java.lang.String HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_ENABLED_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_ENABLED_DEFAULT
```
public static final boolean HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_ENABLED_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_THRESHOLD_MS_KEY
```
public static final java.lang.String HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_THRESHOLD_MS_KEY
```
    See Also:
    
    core-default.xml, Constant Field Values
  - HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_THRESHOLD_MS_DEFAULT
```
public static final int HADOOP_SECURITY_DNS_LOG_SLOW_LOOKUPS_THRESHOLD_MS_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HA_HM_CONNECT_RETRY_INTERVAL_KEY
```
public static final java.lang.String HA_HM_CONNECT_RETRY_INTERVAL_KEY
```
    HA health monitor and failover controller.
    
    See Also:
    
    Constant Field Values
  - HA_HM_CONNECT_RETRY_INTERVAL_DEFAULT
```
public static final long HA_HM_CONNECT_RETRY_INTERVAL_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HA_HM_CHECK_INTERVAL_KEY
```
public static final java.lang.String HA_HM_CHECK_INTERVAL_KEY
```
    See Also:
    
    Constant Field Values
  - HA_HM_CHECK_INTERVAL_DEFAULT
```
public static final long HA_HM_CHECK_INTERVAL_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HA_HM_SLEEP_AFTER_DISCONNECT_KEY
```
public static final java.lang.String HA_HM_SLEEP_AFTER_DISCONNECT_KEY
```
    See Also:
    
    Constant Field Values
  - HA_HM_SLEEP_AFTER_DISCONNECT_DEFAULT
```
public static final long HA_HM_SLEEP_AFTER_DISCONNECT_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HA_HM_RPC_CONNECT_MAX_RETRIES_KEY
```
public static final java.lang.String HA_HM_RPC_CONNECT_MAX_RETRIES_KEY
```
    How many time to retry connecting to the service.
    
    See Also:
    
    Constant Field Values
  - HA_HM_RPC_CONNECT_MAX_RETRIES_DEFAULT
```
public static final int HA_HM_RPC_CONNECT_MAX_RETRIES_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HA_HM_RPC_TIMEOUT_KEY
```
public static final java.lang.String HA_HM_RPC_TIMEOUT_KEY
```
    How often to retry connecting to the service.
    
    See Also:
    
    Constant Field Values
  - HA_HM_RPC_TIMEOUT_DEFAULT
```
public static final int HA_HM_RPC_TIMEOUT_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HA_FC_NEW_ACTIVE_TIMEOUT_KEY
```
public static final java.lang.String HA_FC_NEW_ACTIVE_TIMEOUT_KEY
```
    See Also:
    
    Constant Field Values
  - HA_FC_NEW_ACTIVE_TIMEOUT_DEFAULT
```
public static final int HA_FC_NEW_ACTIVE_TIMEOUT_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HA_FC_GRACEFUL_FENCE_TIMEOUT_KEY
```
public static final java.lang.String HA_FC_GRACEFUL_FENCE_TIMEOUT_KEY
```
    See Also:
    
    Constant Field Values
  - HA_FC_GRACEFUL_FENCE_TIMEOUT_DEFAULT
```
public static final int HA_FC_GRACEFUL_FENCE_TIMEOUT_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HA_FC_GRACEFUL_FENCE_CONNECTION_RETRIES
```
public static final java.lang.String HA_FC_GRACEFUL_FENCE_CONNECTION_RETRIES
```
    See Also:
    
    Constant Field Values
  - HA_FC_GRACEFUL_FENCE_CONNECTION_RETRIES_DEFAULT
```
public static final int HA_FC_GRACEFUL_FENCE_CONNECTION_RETRIES_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HA_FC_ELECTOR_ZK_OP_RETRIES_KEY
```
public static final java.lang.String HA_FC_ELECTOR_ZK_OP_RETRIES_KEY
```
    number of zookeeper operation retry times in ActiveStandbyElector
    
    See Also:
    
    Constant Field Values
  - HA_FC_ELECTOR_ZK_OP_RETRIES_DEFAULT
```
public static final int HA_FC_ELECTOR_ZK_OP_RETRIES_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HA_FC_CLI_CHECK_TIMEOUT_KEY
```
public static final java.lang.String HA_FC_CLI_CHECK_TIMEOUT_KEY
```
    See Also:
    
    Constant Field Values
  - HA_FC_CLI_CHECK_TIMEOUT_DEFAULT
```
public static final int HA_FC_CLI_CHECK_TIMEOUT_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_HTTP_STATIC_USER
```
public static final java.lang.String HADOOP_HTTP_STATIC_USER
```
    Static user web-filter properties. See StaticUserWebFilter.
    
    See Also:
    
    Constant Field Values
  - DEFAULT_HADOOP_HTTP_STATIC_USER
```
public static final java.lang.String DEFAULT_HADOOP_HTTP_STATIC_USER
```
    See Also:
    
    Constant Field Values
  - HADOOP_USER_GROUP_STATIC_OVERRIDES
```
public static final java.lang.String HADOOP_USER_GROUP_STATIC_OVERRIDES
```
    User->groups static mapping to override the groups lookup
    
    See Also:
    
    Constant Field Values
  - HADOOP_USER_GROUP_STATIC_OVERRIDES_DEFAULT
```
public static final java.lang.String HADOOP_USER_GROUP_STATIC_OVERRIDES_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_JETTY_LOGS_SERVE_ALIASES
```
public static final java.lang.String HADOOP_JETTY_LOGS_SERVE_ALIASES
```
    Enable/Disable aliases serving from jetty
    
    See Also:
    
    Constant Field Values
  - DEFAULT_HADOOP_JETTY_LOGS_SERVE_ALIASES
```
public static final boolean DEFAULT_HADOOP_JETTY_LOGS_SERVE_ALIASES
```
    See Also:
    
    Constant Field Values
  - KERBEROS_TICKET_CACHE_PATH
```
public static final java.lang.String KERBEROS_TICKET_CACHE_PATH
```
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_UID_NAME_CACHE_TIMEOUT_KEY
```
public static final java.lang.String HADOOP_SECURITY_UID_NAME_CACHE_TIMEOUT_KEY
```
    See Also:
    
    Constant Field Values
  - CUSTOM_RPC_AUTH_METHOD_CLASS_KEY
```
public static final java.lang.String CUSTOM_RPC_AUTH_METHOD_CLASS_KEY
```
    A class that extends RpcAuthMethod
    
    See Also:
    
    Constant Field Values
  - CUSTOM_AUTH_METHOD_PRINCIPAL_CLASS_KEY
```
public static final java.lang.String CUSTOM_AUTH_METHOD_PRINCIPAL_CLASS_KEY
```
    A class that extends Principal
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_UID_NAME_CACHE_TIMEOUT_DEFAULT
```
public static final long HADOOP_SECURITY_UID_NAME_CACHE_TIMEOUT_DEFAULT
```
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_ASYNC_CALLS_MAX_KEY
```
public static final java.lang.String IPC_CLIENT_ASYNC_CALLS_MAX_KEY
```
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_ASYNC_CALLS_MAX_DEFAULT
```
public static final int IPC_CLIENT_ASYNC_CALLS_MAX_DEFAULT
```
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_FALLBACK_TO_SIMPLE_AUTH_ALLOWED_KEY
```
public static final java.lang.String IPC_CLIENT_FALLBACK_TO_SIMPLE_AUTH_ALLOWED_KEY
```
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_FALLBACK_TO_SIMPLE_AUTH_ALLOWED_DEFAULT
```
public static final boolean IPC_CLIENT_FALLBACK_TO_SIMPLE_AUTH_ALLOWED_DEFAULT
```
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_BIND_WILDCARD_ADDR_KEY
```
public static final java.lang.String IPC_CLIENT_BIND_WILDCARD_ADDR_KEY
```
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_BIND_WILDCARD_ADDR_DEFAULT
```
public static final boolean IPC_CLIENT_BIND_WILDCARD_ADDR_DEFAULT
```
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SASL_KEY
```
public static final java.lang.String IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SASL_KEY
```
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SASL_DEFAULT
```
public static final int IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SASL_DEFAULT
```
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_CONNECTION_IDLESCANINTERVAL_KEY
```
public static final java.lang.String IPC_CLIENT_CONNECTION_IDLESCANINTERVAL_KEY
```
    How often the server scans for idle connections
    
    See Also:
    
    Constant Field Values
  - IPC_CLIENT_CONNECTION_IDLESCANINTERVAL_DEFAULT
```
public static final int IPC_CLIENT_CONNECTION_IDLESCANINTERVAL_DEFAULT
```
    Default value for IPC_SERVER_CONNECTION_IDLE_SCAN_INTERVAL_KEY
    
    See Also:
    
    Constant Field Values
  - HADOOP_USER_GROUP_METRICS_PERCENTILES_INTERVALS
```
public static final java.lang.String HADOOP_USER_GROUP_METRICS_PERCENTILES_INTERVALS
```
    See Also:
    
    Constant Field Values
  - RPC_METRICS_QUANTILE_ENABLE
```
public static final java.lang.String RPC_METRICS_QUANTILE_ENABLE
```
    See Also:
    
    Constant Field Values
  - RPC_METRICS_QUANTILE_ENABLE_DEFAULT
```
public static final boolean RPC_METRICS_QUANTILE_ENABLE_DEFAULT
```
    See Also:
    
    Constant Field Values
  - RPC_METRICS_PERCENTILES_INTERVALS_KEY
```
public static final java.lang.String RPC_METRICS_PERCENTILES_INTERVALS_KEY
```
    See Also:
    
    Constant Field Values
  - RPC_METRICS_TIME_UNIT
```
public static final java.lang.String RPC_METRICS_TIME_UNIT
```
    See Also:
    
    Constant Field Values
  - NFS_EXPORTS_ALLOWED_HOSTS_SEPARATOR
```
public static final java.lang.String NFS_EXPORTS_ALLOWED_HOSTS_SEPARATOR
```
    Allowed hosts for nfs exports
    
    See Also:
    
    Constant Field Values
  - NFS_EXPORTS_ALLOWED_HOSTS_KEY
```
public static final java.lang.String NFS_EXPORTS_ALLOWED_HOSTS_KEY
```
    See Also:
    
    Constant Field Values
  - NFS_EXPORTS_ALLOWED_HOSTS_KEY_DEFAULT
```
public static final java.lang.String NFS_EXPORTS_ALLOWED_HOSTS_KEY_DEFAULT
```
    See Also:
    
    Constant Field Values
  - FS_CLIENT_HTRACE_PREFIX
```
public static final java.lang.String FS_CLIENT_HTRACE_PREFIX
```
    See Also:
    
    Constant Field Values
  - ZK_PREFIX
```
public static final java.lang.String ZK_PREFIX
```
    See Also:
    
    Constant Field Values
  - ZK_ACL
```
public static final java.lang.String ZK_ACL
```
    ACL for the ZooKeeper ensemble.
    
    See Also:
    
    Constant Field Values
  - ZK_ACL_DEFAULT
```
public static final java.lang.String ZK_ACL_DEFAULT
```
    See Also:
    
    Constant Field Values
  - ZK_AUTH
```
public static final java.lang.String ZK_AUTH
```
    Authentication for the ZooKeeper ensemble.
    
    See Also:
    
    Constant Field Values
  - ZK_SERVER_PRINCIPAL
```
public static final java.lang.String ZK_SERVER_PRINCIPAL
```
    Principal name for zookeeper servers.
    
    See Also:
    
    Constant Field Values
  - ZK_KERBEROS_PRINCIPAL
```
public static final java.lang.String ZK_KERBEROS_PRINCIPAL
```
    Kerberos principal name for zookeeper connection.
    
    See Also:
    
    Constant Field Values
  - ZK_KERBEROS_KEYTAB
```
public static final java.lang.String ZK_KERBEROS_KEYTAB
```
    Kerberos keytab for zookeeper connection.
    
    See Also:
    
    Constant Field Values
  - ZK_ADDRESS
```
public static final java.lang.String ZK_ADDRESS
```
    Address of the ZooKeeper ensemble.
    
    See Also:
    
    Constant Field Values
  - ZK_NUM_RETRIES
```
public static final java.lang.String ZK_NUM_RETRIES
```
    Maximum number of retries for a ZooKeeper operation.
    
    See Also:
    
    Constant Field Values
  - ZK_NUM_RETRIES_DEFAULT
```
public static final int ZK_NUM_RETRIES_DEFAULT
```
    See Also:
    
    Constant Field Values
  - ZK_TIMEOUT_MS
```
public static final java.lang.String ZK_TIMEOUT_MS
```
    Timeout for a ZooKeeper operation in ZooKeeper in milliseconds.
    
    See Also:
    
    Constant Field Values
  - ZK_TIMEOUT_MS_DEFAULT
```
public static final int ZK_TIMEOUT_MS_DEFAULT
```
    See Also:
    
    Constant Field Values
  - ZK_RETRY_INTERVAL_MS
```
public static final java.lang.String ZK_RETRY_INTERVAL_MS
```
    How often to retry a ZooKeeper operation in milliseconds.
    
    See Also:
    
    Constant Field Values
  - ZK_CLIENT_SSL_ENABLED
```
public static final java.lang.String ZK_CLIENT_SSL_ENABLED
```
    SSL enablement for all Hadoop->ZK communication.
    
    See Also:
    
    Constant Field Values
  - ZK_SSL_KEYSTORE_LOCATION
```
public static final java.lang.String ZK_SSL_KEYSTORE_LOCATION
```
    Keystore location for ZooKeeper client connection over SSL.
    
    See Also:
    
    Constant Field Values
  - ZK_SSL_KEYSTORE_PASSWORD
```
public static final java.lang.String ZK_SSL_KEYSTORE_PASSWORD
```
    Keystore password for ZooKeeper client connection over SSL.
    
    See Also:
    
    Constant Field Values
  - ZK_SSL_TRUSTSTORE_LOCATION
```
public static final java.lang.String ZK_SSL_TRUSTSTORE_LOCATION
```
    Truststore location for ZooKeeper client connection over SSL.
    
    See Also:
    
    Constant Field Values
  - ZK_SSL_TRUSTSTORE_PASSWORD
```
public static final java.lang.String ZK_SSL_TRUSTSTORE_PASSWORD
```
    Truststore password for ZooKeeper client connection over SSL.
    
    See Also:
    
    Constant Field Values
  - ZK_RETRY_INTERVAL_MS_DEFAULT
```
public static final int ZK_RETRY_INTERVAL_MS_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_DOMAINNAME_RESOLVER_IMPL
```
public static final java.lang.String HADOOP_DOMAINNAME_RESOLVER_IMPL
```
    Default domain name resolver for hadoop to use.
    
    See Also:
    
    Constant Field Values
  - HADOOP_DOMAINNAME_RESOLVER_IMPL_DEFAULT
```
public static final java.lang.Class<? extends DomainNameResolver> HADOOP_DOMAINNAME_RESOLVER_IMPL_DEFAULT
```
  - DFS_CLIENT_IGNORE_NAMENODE_DEFAULT_KMS_URI
```
public static final java.lang.String DFS_CLIENT_IGNORE_NAMENODE_DEFAULT_KMS_URI
```
    See Also:
    
    Constant Field Values
  - DFS_CLIENT_IGNORE_NAMENODE_DEFAULT_KMS_URI_DEFAULT
```
public static final boolean DFS_CLIENT_IGNORE_NAMENODE_DEFAULT_KMS_URI_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HADOOP_METRICS_JVM_USE_THREAD_MXBEAN
```
public static final java.lang.String HADOOP_METRICS_JVM_USE_THREAD_MXBEAN
```
    Whether or not ThreadMXBean is used for getting thread info in JvmMetrics, ThreadGroup approach is preferred for better performance.
    
    See Also:
    
    Constant Field Values
  - HADOOP_METRICS_JVM_USE_THREAD_MXBEAN_DEFAULT
```
public static final boolean HADOOP_METRICS_JVM_USE_THREAD_MXBEAN_DEFAULT
```
    See Also:
    
    Constant Field Values
  - IOSTATISTICS_LOGGING_LEVEL
```
public static final java.lang.String IOSTATISTICS_LOGGING_LEVEL
```
    logging level for IOStatistics (debug or info).
    
    See Also:
    
    Constant Field Values
  - IOSTATISTICS_LOGGING_LEVEL_DEBUG
```
public static final java.lang.String IOSTATISTICS_LOGGING_LEVEL_DEBUG
```
    DEBUG logging level for IOStatistics logging.
    
    See Also:
    
    Constant Field Values
  - IOSTATISTICS_LOGGING_LEVEL_WARN
```
public static final java.lang.String IOSTATISTICS_LOGGING_LEVEL_WARN
```
    WARN logging level for IOStatistics logging.
    
    See Also:
    
    Constant Field Values
  - IOSTATISTICS_LOGGING_LEVEL_ERROR
```
public static final java.lang.String IOSTATISTICS_LOGGING_LEVEL_ERROR
```
    ERROR logging level for IOStatistics logging.
    
    See Also:
    
    Constant Field Values
  - IOSTATISTICS_LOGGING_LEVEL_INFO
```
public static final java.lang.String IOSTATISTICS_LOGGING_LEVEL_INFO
```
    INFO logging level for IOStatistics logging.
    
    See Also:
    
    Constant Field Values
  - IOSTATISTICS_LOGGING_LEVEL_DEFAULT
```
public static final java.lang.String IOSTATISTICS_LOGGING_LEVEL_DEFAULT
```
    Default value for IOStatistics logging level.
    
    See Also:
    
    Constant Field Values
  - HADOOP_TMP_DIR
```
public static final java.lang.String HADOOP_TMP_DIR
```
    default hadoop temp dir on local system: "hadoop.tmp.dir".
    
    See Also:
    
    Constant Field Values
  - IOSTATISTICS_THREAD_LEVEL_ENABLED
```
public static final java.lang.String IOSTATISTICS_THREAD_LEVEL_ENABLED
```
    Thread-level IOStats Support. "fs.iostatistics.thread.level.enabled"
    
    See Also:
    
    Constant Field Values
  - IOSTATISTICS_THREAD_LEVEL_ENABLED_DEFAULT
```
public static final boolean IOSTATISTICS_THREAD_LEVEL_ENABLED_DEFAULT
```
    Default value for Thread-level IOStats Support is true.
    
    See Also:
    
    Constant Field Values
  - HADOOP_SECURITY_RESOLVER_IMPL
```
public static final java.lang.String HADOOP_SECURITY_RESOLVER_IMPL
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - CommonConfigurationKeys
```
public CommonConfigurationKeys()
```

Class CommonConfigurationKeys

Field Summary

Fields inherited from class org.apache.hadoop.fs.CommonConfigurationKeysPublic

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

FS_HOME_DIR_KEY

FS_HOME_DIR_DEFAULT

FS_PERMISSIONS_UMASK_KEY

FS_PERMISSIONS_UMASK_DEFAULT

FS_CACHE_LRU_ENABLE

DEFAULT_FS_CACHE_LRU_ENABLE

FS_CACHE_LRU_ENTRIES_MAX_SIZE

DEFAULT_FS_CACHE_LRU_ENTRIES_MAX_SIZE

FS_CACHE_LRU_ENTRIES_EXPIRE_AFTER_ACCESS_MS

DEFAULT_FS_CACHE_LRU_ENTRIES_EXPIRE_AFTER_ACCESS_MS

IPC_PING_INTERVAL_KEY

IPC_PING_INTERVAL_DEFAULT

IPC_CLIENT_PING_KEY

IPC_CLIENT_PING_DEFAULT

IPC_CLIENT_RPC_TIMEOUT_KEY

IPC_CLIENT_RPC_TIMEOUT_DEFAULT

IPC_SERVER_RPC_MAX_RESPONSE_SIZE_KEY

IPC_SERVER_RPC_MAX_RESPONSE_SIZE_DEFAULT

IPC_SERVER_RPC_READ_THREADS_KEY

IPC_SERVER_RPC_READ_THREADS_DEFAULT

IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE_KEY

IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE_DEFAULT

IPC_MAXIMUM_DATA_LENGTH

IPC_MAXIMUM_DATA_LENGTH_DEFAULT

IPC_MAXIMUM_RESPONSE_LENGTH

IPC_MAXIMUM_RESPONSE_LENGTH_DEFAULT

IPC_SERVER_HANDLER_QUEUE_SIZE_KEY

IPC_SERVER_HANDLER_QUEUE_SIZE_DEFAULT

IPC_NAMESPACE

IPC_CALLQUEUE_IMPL_KEY

IPC_SCHEDULER_IMPL_KEY

IPC_IDENTITY_PROVIDER_KEY

IPC_COST_PROVIDER_KEY

IPC_BACKOFF_ENABLE

IPC_BACKOFF_ENABLE_DEFAULT

IPC_CALLQUEUE_SERVER_FAILOVER_ENABLE

IPC_CALLQUEUE_SERVER_FAILOVER_ENABLE_DEFAULT

IPC_CALLQUEUE_CAPACITY_WEIGHTS_KEY

IPC_SCHEDULER_PRIORITY_LEVELS_KEY

IPC_SCHEDULER_PRIORITY_LEVELS_DEFAULT_KEY

NET_TOPOLOGY_CONFIGURED_NODE_MAPPING_KEY

IO_COMPRESSION_CODECS_KEY

IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_KEY

IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_DEFAULT

IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_KEY

IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_DEFAULT

IO_COMPRESSION_CODEC_ZSTD_LEVEL_KEY

IO_COMPRESSION_CODEC_ZSTD_LEVEL_DEFAULT

IO_COMPRESSION_CODEC_ZSTD_BUFFER_SIZE_KEY

IO_COMPRESSION_CODEC_ZSTD_BUFFER_SIZE_DEFAULT

IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_KEY

IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_DEFAULT

IO_COMPRESSION_CODEC_LZ4_USELZ4HC_KEY

IO_COMPRESSION_CODEC_LZ4_USELZ4HC_DEFAULT

HADOOP_SECURITY_SERVICE_AUTHORIZATION_DEFAULT_ACL

HADOOP_SECURITY_SERVICE_AUTHORIZATION_DEFAULT_BLOCKED_ACL

HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_POLICY

HADOOP_SECURITY_SERVICE_AUTHORIZATION_GET_USER_MAPPINGS

HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_USER_MAPPINGS

HADOOP_SECURITY_SERVICE_AUTHORIZATION_REFRESH_CALLQUEUE

HADOOP_SECURITY_SERVICE_AUTHORIZATION_GENERIC_REFRESH

HADOOP_SECURITY_SERVICE_AUTHORIZATION_TRACING

HADOOP_SECURITY_SERVICE_AUTHORIZATION_DATANODE_LIFELINE

HADOOP_SECURITY_SERVICE_AUTHORIZATION_RECONFIGURATION

SECURITY_HA_SERVICE_PROTOCOL_ACL

SECURITY_ZKFC_PROTOCOL_ACL

SECURITY_CLIENT_PROTOCOL_ACL

SECURITY_CLIENT_DATANODE_PROTOCOL_ACL

SECURITY_ROUTER_ADMIN_PROTOCOL_ACL

SECURITY_DATANODE_PROTOCOL_ACL

SECURITY_INTER_DATANODE_PROTOCOL_ACL

SECURITY_NAMENODE_PROTOCOL_ACL

SECURITY_QJOURNAL_SERVICE_PROTOCOL_ACL