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https://issues.apache.org/jira/browse/HADOOP-2338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12548576
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Jim Kellerman commented on HADOOP-2338:
---------------------------------------
TestTableMapReduce timed out in the build above because one region was in the
middle of doing a split when
the test went to shutdown the cluster. The problem was that at the end of the
split, the region server doing the
split could not record the split in the meta table.
Somehow, (TBD) we need to have a 'quiesce' state in which normal client
requests are rejected but
communication between region servers and master are allowed until the region
servers finish all the stuff
they are doing. At that point, they could report back to the master and the
cluster could shut down.
> [hbase] NPE in master server
> ----------------------------
>
> Key: HADOOP-2338
> URL: https://issues.apache.org/jira/browse/HADOOP-2338
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/hbase
> Affects Versions: 0.16.0
> Reporter: Jim Kellerman
> Assignee: Jim Kellerman
> Fix For: 0.16.0
>
> Attachments: master.log.gz, patch.txt
>
>
> Master gets an NPE after receiving multiple responses from the same server
> telling the master it has opened a region.
> {code}
> 2007-12-02 20:31:37,515 DEBUG hbase.HRegion - Next sequence id for region
> postlog,img254/577/02suecia024richardburnson0.jpg,1196619667879 is 73377537
> 2007-12-02 20:31:37,517 INFO hbase.HRegion - region
> postlog,img254/577/02suecia024richardburnson0.jpg,1196619667879 available
> 2007-12-02 20:31:39,200 WARN hbase.HRegionServer - Processing message
> (Retry: 0)
> java.io.IOException: java.io.IOException: java.lang.NullPointerException
> at org.apache.hadoop.hbase.HMaster.processMsgs(HMaster.java :1484)
> at org.apache.hadoop.hbase.HMaster.regionServerReport(HMaster.java:1423)
> at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
> :25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:379)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:596)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0 (Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java
> :27)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> at
> org.apache.hadoop.hbase.RemoteExceptionHandler.decodeRemoteException(RemoteExceptionHandler.java:82)
> at org.apache.hadoop.hbase.RemoteExceptionHandler.checkIOException
> (RemoteExceptionHandler.java:48)
> at org.apache.hadoop.hbase.HRegionServer.run(HRegionServer.java:759)
> at java.lang.Thread.run(Thread.java:619)
> case HMsg.MSG_REPORT_PROCESS_OPEN:
> synchronized ( this.assignAttempts) {
> // Region server has acknowledged request to open region.
> // Extend region open time by 1/2 max region open time.
> **1484** assignAttempts.put(region.getRegionName (),
> Long.valueOf(assignAttempts.get(
> region.getRegionName()).longValue() +
> (this.maxRegionOpenTime / 2)));
> }
> break;
> {code}
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