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From "Jieshan Bean (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3989) Error occured while RegionServer report to Master "we are up" should get master address again
Date Fri, 17 Jun 2011 04:22:47 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13050894#comment-13050894
] 

Jieshan Bean commented on HBASE-3989:
-------------------------------------

OK...I'll remember how to make the patch. And I am learning how to write a unit test. And
while I'm making a patch, I'll check whether somewhere to modify or add to the unit test next
time.
Thanks for your suggestions, stack :)

> Error occured while RegionServer report to Master "we are up" should get master address
again
> ---------------------------------------------------------------------------------------------
>
>                 Key: HBASE-3989
>                 URL: https://issues.apache.org/jira/browse/HBASE-3989
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.90.3
>            Reporter: Jieshan Bean
>            Assignee: Jieshan Bean
>             Fix For: 0.90.4
>
>         Attachments: HBASE-3989-RegionServer.patch
>
>
> I happened to fall across a problem, after some further analysis, I found the problem(The
logs was attached at the end of the email)
> Consider the following scenario which is similar with my problem :
> 1. Due to some unclear reason,  the report to master got error. And retrying several
times, but also failed.
> 2. During this time , the standby master becomes the active one. So the endless loop
is still running, and it won't success, for the master address has updated, but it didn't
know. And won't know again.
>    while (!stopped && (masterAddress = getMaster()) == null) {
>       sleeper.sleep();
>       LOG.warn("Unable to get master for initialization");
>     }
>     MapWritable result = null;
>     long lastMsg = 0;
>     while (!stopped) {
>       try {
>         this.requestCount.set(0);
>         lastMsg = System.currentTimeMillis();
>         ZKUtil.setAddressAndWatch(zooKeeper,
>           ZKUtil.joinZNode(zooKeeper.rsZNode, ZKUtil.getNodeName(serverInfo)),
>           this.serverInfo.getServerAddress());
>         this.serverInfo.setLoad(buildServerLoad());
>         LOG.info("Telling master at " + masterAddress + " that we are up");
>         result = this.hbaseMaster.regionServerStartup(this.serverInfo,
>             EnvironmentEdgeManager.currentTimeMillis());
>         break;
>       } catch (RemoteException e) {
>         IOException ioe = e.unwrapRemoteException();
>         if (ioe instanceof ClockOutOfSyncException) {
>           LOG.fatal("Master rejected startup because clock is out of sync",
>               ioe);
>           // Re-throw IOE will cause RS to abort
>           throw ioe;
>         } else {
>           LOG.warn("remote error telling master we are up", e);
>         }
>       } catch (IOException e) {
>         LOG.warn("error telling master we are up", e);
>       } catch (KeeperException e) {
>         LOG.warn("error putting up ephemeral node in zookeeper", e);
>       }
>       sleeper.sleep(lastMsg);
>     }
> Here's the logs:
> 2011-06-13 11:25:12,236 WARN org.apache.hadoop.hbase.regionserver.HRegionServer: error
telling master we are up
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)
> 	at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:207)
> 	at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:419)
> 	at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupIOstreams(HBaseClient.java:328)
> 	at org.apache.hadoop.hbase.ipc.HBaseClient.getConnection(HBaseClient.java:883)
> 	at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:750)
> 	at org.apache.hadoop.hbase.ipc.HBaseRPC$Invoker.invoke(HBaseRPC.java:257)
> 	at $Proxy5.regionServerStartup(Unknown Source)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.reportForDuty(HRegionServer.java:1511)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.tryReportForDuty(HRegionServer.java:1479)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:571)
> 	at java.lang.Thread.run(Thread.java:662)
> 2011-06-13 11:25:15,231 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: Telling
master at 157-5-111-22:20000 that we are up
> 2011-06-13 11:25:15,232 WARN org.apache.hadoop.hbase.regionserver.HRegionServer: error
telling master we are up
> java.net.ConnectException: Connection refused
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)
> 	at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:207)
> 	at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:419)
> 	at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupIOstreams(HBaseClient.java:328)
> 	at org.apache.hadoop.hbase.ipc.HBaseClient.getConnection(HBaseClient.java:883)
> 	at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:750)
> 	at org.apache.hadoop.hbase.ipc.HBaseRPC$Invoker.invoke(HBaseRPC.java:257)
> 	at $Proxy5.regionServerStartup(Unknown Source)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.reportForDuty(HRegionServer.java:1511)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.tryReportForDuty(HRegionServer.java:1479)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:571)
> 	at java.lang.Thread.run(Thread.java:662)
> 2011-06-13 11:25:18,225 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: Telling
master at 157-5-111-22:20000 that we are up
> So I think, while the error orrured, we should re-get the master address. This problem
could be solved.

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