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https://issues.apache.org/jira/browse/HBASE-9796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13799018#comment-13799018
]
Hudson commented on HBASE-9796:
-------------------------------
FAILURE: Integrated in HBase-TRUNK #4627 (See
[https://builds.apache.org/job/HBase-TRUNK/4627/])
HBASE-9796 npe in RegionServerCallable (stack: rev 1533296)
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionServerCallable.java
> 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: 0.98.0, 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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