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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-750) NPE caused by StoreFileScanner.updateReaders
Date Tue, 22 Jul 2008 22:57:31 GMT

    [ https://issues.apache.org/jira/browse/HBASE-750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12615825#action_12615825
] 

Andrew Purtell commented on HBASE-750:
--------------------------------------

Let me check again. Just noticed that the '-dev' has been dropped from the version (and jar
file).

> NPE caused by StoreFileScanner.updateReaders
> --------------------------------------------
>
>                 Key: HBASE-750
>                 URL: https://issues.apache.org/jira/browse/HBASE-750
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.2.0
>         Environment: CentOS 5.1 x86_64 / 64-bit JDK build 1.6.0_03-b05
>            Reporter: Andrew Purtell
>         Attachments: chart.png, columntest.java, HRegionServer-sjdc-atr-test-4.log, output.txt
>
>
> Running a test to determine performance during inserts of many 100,000s of cells into
a single column family in a single row, the region server involved went down after taking
a NPE:
> 2008-07-17 18:12:18,051 FATAL org.apache.hadoop.hbase.regionserver.Flusher: Replay of
hlog required. Forcing server restart
> org.apache.hadoop.hbase.DroppedSnapshotException
>         at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1040)
>         at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:942)
>         at org.apache.hadoop.hbase.regionserver.Flusher.flushRegion(Flusher.java:174)
>         at org.apache.hadoop.hbase.regionserver.Flusher.run(Flusher.java:93)
> Caused by: java.lang.NullPointerException
>         at java.lang.String.<init>(String.java:516)
>         at org.apache.hadoop.hbase.util.Bytes.toString(Bytes.java:71)
>         at org.apache.hadoop.hbase.regionserver.StoreFileScanner.updateReaders(StoreFileScanner.java:374)
>         at org.apache.hadoop.hbase.regionserver.HStore.notifyChangedReadersObservers(HStore.java:797)
>         at org.apache.hadoop.hbase.regionserver.HStore.updateReaders(HStore.java:784)
>         at org.apache.hadoop.hbase.regionserver.HStore.internalFlushCache(HStore.java:755)
>         at org.apache.hadoop.hbase.regionserver.HStore.flushCache(HStore.java:682)
>         at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1030)
>         ... 3 more
> Any ideas about this one?

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