Package org.apache.hadoop.hdfs.qjournal.server

Class JournalNodeSyncer

java.lang.Object

org.apache.hadoop.hdfs.qjournal.server.JournalNodeSyncer

@Private
public class JournalNodeSyncer
extends Object

A Journal Sync thread runs through the lifetime of the JN. It periodically gossips with other journal nodes to compare edit log manifests and if it detects any missing log segment, it downloads it from the other journal node

Field Summary

Fields

Modifier and Type	Field	Description
static final org.slf4j.Logger	LOG

Method Summary

Modifier and Type	Method	Description
protected List<InetSocketAddress>	getJournalAddrList(String uriStr)
boolean	isJournalSyncerStarted()
void	start(String nsId)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

LOG

public static final org.slf4j.Logger LOG

Method Details

start

public void start(String nsId)

isJournalSyncerStarted

public boolean isJournalSyncerStarted()

getJournalAddrList

@VisibleForTesting
protected List<InetSocketAddress> getJournalAddrList(String uriStr)
                                              throws URISyntaxException,
IOException

Throws:

URISyntaxException

IOException