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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-236) [hbase] NPE on failed open of region
Date Sun, 24 Feb 2008 06:02:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12571865#action_12571865
] 

stack commented on HBASE-236:
-----------------------------

+1 on combing info and bloom filter all into one file (I'd imagine info and bloom filter might
be done as metadata on a SequenceFile).  Should we also add index (BigTable adds them to end
of the file).  Will help w/ the too-many-open files issue.

> [hbase] NPE on failed open of region
> ------------------------------------
>
>                 Key: HBASE-236
>                 URL: https://issues.apache.org/jira/browse/HBASE-236
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: regionserver
>            Reporter: stack
>            Assignee: Jim Kellerman
>             Fix For: 0.2.0
>
>
> 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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