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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-2445) [hbase] NPE on failed open of region
Date Mon, 17 Dec 2007 20:11:43 GMT
[hbase] NPE on failed open of region
------------------------------------

                 Key: HADOOP-2445
                 URL: https://issues.apache.org/jira/browse/HADOOP-2445
             Project: Hadoop
          Issue Type: Bug
            Reporter: stack
            Priority: Minor


>From Bryan Duxbury supplied log:

{code}
   1044 2007-12-15 04:37:56,052 INFO org.apache.hadoop.hbase.HRegionServer: MSG_REGION_OPEN
: spider_pages,7_202623541,1197662034823
   1045 2007-12-15 04:37:56,060 ERROR org.apache.hadoop.hbase.HRegionServer: error opening
region spider_pages,7_202623541,1197662034823
   1046 java.io.EOFException
   1047     at java.io.DataInputStream.readByte(DataInputStream.java:250)
   1048     at org.apache.hadoop.hbase.HStoreFile.loadInfo(HStoreFile.java:594)
   1049     at org.apache.hadoop.hbase.HStore.<init>(HStore.java:613)
   1050     at org.apache.hadoop.hbase.HRegion.<init>(HRegion.java:287)
   1051     at org.apache.hadoop.hbase.HRegionServer.openRegion(HRegionServer.java:1182)
   1052     at org.apache.hadoop.hbase.HRegionServer$Worker.run(HRegionServer.java:1133)
   1053     at java.lang.Thread.run(Thread.java:619)
   1054 2007-12-15 04:37:56,061 FATAL org.apache.hadoop.hbase.HRegionServer: Unhandled exception
                                                                                         
                                                                                         
                                          1055 java.lang.NullPointerException
   1056     at org.apache.hadoop.hbase.HRegionServer.reportClose(HRegionServer.java:1066)
   1057     at org.apache.hadoop.hbase.HRegionServer.openRegion(HRegionServer.java:1188)
   1058     at org.apache.hadoop.hbase.HRegionServer$Worker.run(HRegionServer.java:1133)
   1059     at java.lang.Thread.run(Thread.java:619)
   1060 2007-12-15 04:37:56,061 INFO org.apache.hadoop.hbase.HRegionServer: worker thread
exiting
{code}

I see same exception when we try to deploy same region on another server; the info file must
be horked (Seems like something we could recover from reading through looking for highest
sequence number; would be expensive but alternative is lost region).

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