Package org.apache.hadoop.hdfs.server.federation.router

Interface RouterRpcMonitor

All Known Implementing Classes:

FederationRPCPerformanceMonitor

public interface RouterRpcMonitor

Metrics and monitoring interface for the router RPC server. Allows pluggable diagnostics and monitoring services to be attached.

Method Summary

Modifier and Type	Method	Description
void	close()	Close the monitor.
FederationRPCMetrics	getRPCMetrics()	Get Router RPC metrics info.
void	init(org.apache.hadoop.conf.Configuration conf, RouterRpcServer server, StateStoreService store)	Initialize the monitor.
long	proxyOp()	Start proxying an operation to the Namenode.
void	proxyOpComplete(boolean success, java.lang.String nsId, FederationNamenodeServiceState state)	Mark a proxy operation as completed.
void	proxyOpFailureClientOverloaded()	Failed to proxy an operation to a Namenode because the client was overloaded.
void	proxyOpFailureCommunicate(java.lang.String nsId)	Failed to proxy an operation to a namenode because of an unexpected exception.
void	proxyOpFailureStandby(java.lang.String nsId)	Failed to proxy an operation to a namenode because it was in standby.
void	proxyOpNoNamenodes(java.lang.String nsId)	Failed to proxy an operation because of no namenodes available.
void	proxyOpNotImplemented()	Failed to proxy an operation because it is not implemented.
void	proxyOpPermitAccepted(java.lang.String nsId)	Accepted to proxy an operation to a namenode.
void	proxyOpPermitRejected(java.lang.String nsId)	Rejected to proxy an operation to a namenode.
void	proxyOpRetries()	Retry to proxy an operation to a Namenode because of an unexpected exception.
void	routerFailureLocked()	If a path is locked.
void	routerFailureReadOnly()	If a path is in a read only mount point.
void	routerFailureSafemode()	If the Router is in safe mode.
void	routerFailureStateStore()	If the Router cannot contact the State Store in an operation.
void	startOp()	Start processing an operation on the Router.

Method Detail

init

void init(org.apache.hadoop.conf.Configuration conf,
          RouterRpcServer server,
          StateStoreService store)

Initialize the monitor.

Parameters:

conf - Configuration for the monitor.

server - RPC server.

store - State Store.

getRPCMetrics

FederationRPCMetrics getRPCMetrics()

Get Router RPC metrics info.

Returns:

The instance of FederationRPCMetrics.

close

void close()

Close the monitor.

startOp

void startOp()

Start processing an operation on the Router.

proxyOp

long proxyOp()

Start proxying an operation to the Namenode.

Returns:

id of the thread doing the proxying.

proxyOpComplete

void proxyOpComplete(boolean success,
                     java.lang.String nsId,
                     FederationNamenodeServiceState state)

Mark a proxy operation as completed.

Parameters:

success - if the operation was successful.

nsId - nameservice id.

state - namenode state in the federation.

proxyOpFailureStandby

void proxyOpFailureStandby(java.lang.String nsId)

Failed to proxy an operation to a namenode because it was in standby.

Parameters:

nsId - nameservice id.

proxyOpFailureCommunicate

void proxyOpFailureCommunicate(java.lang.String nsId)

Failed to proxy an operation to a namenode because of an unexpected exception.

Parameters:

nsId - nameservice id.

proxyOpPermitRejected

void proxyOpPermitRejected(java.lang.String nsId)

Rejected to proxy an operation to a namenode.

Parameters:

nsId - nameservice id.

proxyOpPermitAccepted

void proxyOpPermitAccepted(java.lang.String nsId)

Accepted to proxy an operation to a namenode.

Parameters:

nsId - nameservice id.

proxyOpFailureClientOverloaded

void proxyOpFailureClientOverloaded()

Failed to proxy an operation to a Namenode because the client was overloaded.

proxyOpNotImplemented

void proxyOpNotImplemented()

Failed to proxy an operation because it is not implemented.

proxyOpRetries

void proxyOpRetries()

Retry to proxy an operation to a Namenode because of an unexpected exception.

proxyOpNoNamenodes

void proxyOpNoNamenodes(java.lang.String nsId)

Failed to proxy an operation because of no namenodes available.

Parameters:

nsId - nameservice id.

routerFailureStateStore

void routerFailureStateStore()

If the Router cannot contact the State Store in an operation.

routerFailureSafemode

void routerFailureSafemode()

If the Router is in safe mode.

routerFailureLocked

void routerFailureLocked()

If a path is locked.

routerFailureReadOnly

void routerFailureReadOnly()

If a path is in a read only mount point.