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From "rajeshbabu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-6115) NullPointerException is thrown when root and meta table regions are assigning to another RS.
Date Mon, 28 May 2012 07:02:22 GMT
rajeshbabu created HBASE-6115:
---------------------------------

             Summary: NullPointerException is thrown when root and meta table regions are
assigning to another RS.
                 Key: HBASE-6115
                 URL: https://issues.apache.org/jira/browse/HBASE-6115
             Project: HBase
          Issue Type: Bug
    Affects Versions: 0.94.0
            Reporter: rajeshbabu
            Assignee: rajeshbabu
            Priority: Minor
             Fix For: 0.94.1


Lets suppose we have two region servers RS1 and RS2.
If region server (RS1) having root and meta regions went down, master will assign them to
another region server RS2. At that time recieved NullPointerException.
{code}
2012-05-04 20:19:52,912 DEBUG org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation:
Looked up root region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@25de152f;
serverName=
2012-05-04 20:19:52,914 DEBUG org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation:
Looked up root region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@25de152f;
serverName=
2012-05-04 20:19:52,916 WARN org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler:
Exception running postOpenDeployTasks; region=1028785192
java.lang.NullPointerException
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processBatchCallback(HConnectionManager.java:1483)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processBatch(HConnectionManager.java:1367)
at org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:945)
at org.apache.hadoop.hbase.client.HTable.doPut(HTable.java:801)
at org.apache.hadoop.hbase.client.HTable.put(HTable.java:776)
at org.apache.hadoop.hbase.catalog.MetaEditor.put(MetaEditor.java:98)
at org.apache.hadoop.hbase.catalog.MetaEditor.putToCatalogTable(MetaEditor.java:88)
at org.apache.hadoop.hbase.catalog.MetaEditor.updateLocation(MetaEditor.java:259)
at org.apache.hadoop.hbase.catalog.MetaEditor.updateMetaLocation(MetaEditor.java:221)
at org.apache.hadoop.hbase.regionserver.HRegionServer.postOpenDeployTasks(HRegionServer.java:1625)
at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler$PostOpenDeployTasksThread.run(OpenRegionHandler.java:241)
2012-05-04 20:19:52,920 DEBUG org.apache.hadoop.hbase.regionserver.HRegion: Closing .META.,,1.1028785192:
disabling compactions & flushes
2012-05-04 20:19:52,920 DEBUG org.apache.hadoop.hbase.regionserver.HRegion: Updates disabled
for region .META.,,1.1028785192

{code}

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