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https://issues.apache.org/jira/browse/HBASE-7293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13560188#comment-13560188
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Jean-Daniel Cryans commented on HBASE-7293:
-------------------------------------------
yeah +1, sorry.
> [replication] Remove dead sinks from ReplicationSource.currentPeers, it's
> spammy
> --------------------------------------------------------------------------------
>
> Key: HBASE-7293
> URL: https://issues.apache.org/jira/browse/HBASE-7293
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.3, 0.96.0
> Reporter: Jean-Daniel Cryans
> Assignee: Lars Hofhansl
> Fix For: 0.96.0, 0.94.5
>
> Attachments: 7293-0.94.txt, 7293-0.94-v2.txt, 7293-0.96.txt
>
>
> I happened to look at a log today where I saw a lot lines like this:
> {noformat}
> 2012-12-06 23:29:08,318 INFO
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Slave
> cluster looks down: This server is in the failed servers list:
> sv4r20s49/10.4.20.49:10304
> 2012-12-06 23:29:15,987 WARN
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Can't
> replicate because of a local or network error:
> java.net.ConnectException: Connection refused
> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> at
> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
> at
> org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
> at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:519)
> at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:484)
> at
> org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupConnection(HBaseClient.java:416)
> at
> org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupIOstreams(HBaseClient.java:462)
> at
> org.apache.hadoop.hbase.ipc.HBaseClient.getConnection(HBaseClient.java:1150)
> at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:1000)
> at
> org.apache.hadoop.hbase.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:150)
> at $Proxy14.replicateLogEntries(Unknown Source)
> at
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.shipEdits(ReplicationSource.java:627)
> at
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:365)
> 2012-12-06 23:29:15,988 INFO
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Slave
> cluster looks down: Connection refused
> {noformat}
> What struck me as weird is this had been going on for some days, I would
> expect the RS to find new servers if it wasn't able to replicate. But the
> reality is that only a few of the chosen sink RS were down so eventually the
> source hits one that's good and is never able to refresh its list of servers.
> We should remove the dead servers, it's spammy and probably adds some slave
> lag.
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