[jira] [Commented] (HBASE-9796) npe in RegionServerCallable

["Enis Soztutar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-9796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13798594#comment-13798594 ] 

Enis Soztutar commented on HBASE-9796:
--------------------------------------

+1

> npe in RegionServerCallable
> ---------------------------
>
>                 Key: HBASE-9796
>                 URL: https://issues.apache.org/jira/browse/HBASE-9796
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.96.0
>            Reporter: stack
>            Assignee: stack
>             Fix For: 0.96.1
>
>         Attachments: 9796.txt
>
>
> Saw this running hbase-it suite on test cluster.  Its tricky.  Needs a little study.  Connection or location became null in this code when we go to clear the caches:
> {code}
>     if (t instanceof SocketTimeoutException ||
>         t instanceof ConnectException ||
>         t instanceof RetriesExhaustedException ||
>         (location != null && getConnection().isDeadServer(location.getServerName()))) {
>       // if thrown these exceptions, we clear all the cache entries that
>       // map to that slow/dead server; otherwise, let cache miss and ask
>       // hbase:meta again to find the new location
>       getConnection().clearCaches(location.getServerName());
> {code}
> Here is exception seen:
> 2013-10-17 09:05:44,569 INFO  [Thread-9] actions.Action: Killed region server:a1811.halxg.cloudera.com,60020,1382025707403. Reported num of rs:4
> 2013-10-17 09:05:44,569 INFO  [Thread-9] actions.Action: Sleeping for:2961
> Exception in thread "HBaseUpdaterThread_3" java.lang.NullPointerException
> 	at org.apache.hadoop.hbase.client.RegionServerCallable.throwable(RegionServerCallable.java:120)
> 	at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:124)
> 	at org.apache.hadoop.hbase.client.HTable.get(HTable.java:755)
> 	at org.apache.hadoop.hbase.util.MultiThreadedUpdater$HBaseUpdaterThread.run(MultiThreadedUpdater.java:159)



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