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Posted to issues@hbase.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2011/08/30 01:15:39 UTC
[jira] [Commented] (HBASE-4286) NPE when master shuts down during
processing of server shutdowns
[ https://issues.apache.org/jira/browse/HBASE-4286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13093292#comment-13093292 ]
Todd Lipcon commented on HBASE-4286:
------------------------------------
Thrown on this line:
{code}
// Iterate regions that were on this server and assign them
for (Map.Entry<HRegionInfo, Result> e: hris.entrySet()) {
{code}
> NPE when master shuts down during processing of server shutdowns
> ----------------------------------------------------------------
>
> Key: HBASE-4286
> URL: https://issues.apache.org/jira/browse/HBASE-4286
> Project: HBase
> Issue Type: Bug
> Reporter: Todd Lipcon
>
> If the master shuts down while trying to process a server crash, it will escape out of the loop trying to read META, and then the {{hris}} variable is null. This results in the following NPE:
> 2011-08-29 16:05:52,436 INFO org.apache.hadoop.hbase.master.handler.ServerShutdownHandler: Reassigning 0 region(s) that c0317.hal.cloudera.com,60020,1314658642935 was carrying (skipping 0 regions(s) that are already in transition)
> 2011-08-29 16:05:52,436 ERROR org.apache.hadoop.hbase.executor.EventHandler: Caught throwable while processing event M_META_SERVER_SHUTDOWN
> java.lang.NullPointerException
> at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:207)
> at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:156)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
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