Package org.apache.hadoop.hdfs.protocol

Interface ReconfigurationProtocol

All Known Implementing Classes:

ReconfigurationProtocolTranslatorPB

@Private
@Evolving
public interface ReconfigurationProtocol

ReconfigurationProtocol is used by HDFS admin to reload configuration for NN/DN without restarting them.

Field Summary

Fields

Modifier and Type	Field	Description
static long	VERSIONID

Method Summary

Modifier and Type	Method	Description
org.apache.hadoop.conf.ReconfigurationTaskStatus	getReconfigurationStatus()	Get the status of the previously issued reconfig task.
java.util.List<java.lang.String>	listReconfigurableProperties()	Get a list of allowed properties for reconfiguration.
void	startReconfiguration()	Asynchronously reload configuration on disk and apply changes.

Field Detail

VERSIONID

static final long VERSIONID

See Also:

Constant Field Values

Method Detail

startReconfiguration

void startReconfiguration()
                   throws java.io.IOException

Asynchronously reload configuration on disk and apply changes.

Throws:

java.io.IOException

getReconfigurationStatus

org.apache.hadoop.conf.ReconfigurationTaskStatus getReconfigurationStatus()
                                                                   throws java.io.IOException

Get the status of the previously issued reconfig task.

Throws:

java.io.IOException

See Also:

ReconfigurationTaskStatus

listReconfigurableProperties

java.util.List<java.lang.String> listReconfigurableProperties()
                                                       throws java.io.IOException

Get a list of allowed properties for reconfiguration.

Throws:

java.io.IOException