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From "Mike Matrigali (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-5031) Exception in thread "index-stat-thread" java.lang.NullPointerException while calling ControlRow.getControlRowForPage(Unknown Source)
Date Sat, 12 Feb 2011 00:46:04 GMT
Exception in thread "index-stat-thread" java.lang.NullPointerException while calling ControlRow.getControlRowForPage(Unknown
Source)
------------------------------------------------------------------------------------------------------------------------------------

                 Key: DERBY-5031
                 URL: https://issues.apache.org/jira/browse/DERBY-5031
             Project: Derby
          Issue Type: Bug
          Components: Store
    Affects Versions: 10.8.0.0
         Environment: 
Sun Microsystems Inc.
1.6.0_181069888
2011-02-11 18:00:25 MET
            Reporter: Mike Matrigali


Nightly tests failed across many platforms with a number of failures.  I noticed this stack
from the background
istats threa hanging out at the end
of the output file in a some of the cases.  I don't know if this stack caused the errors or
not.  It may just be a bad
error handling on shutdown.  It would be good to understand why it is printed when/where it
is.  

FAILURES!!!
Tests run: 13369,  Failures: 3,  Errors: 1

------------------------------
Exception in thread "index-stat-thread" java.lang.NullPointerException
	at org.apache.derby.impl.store.access.btree.ControlRow.getControlRowForPage(Unknown Source)
	at org.apache.derby.impl.store.access.btree.ControlRow.get(Unknown Source)
	at org.apache.derby.impl.store.access.btree.ControlRow.get(Unknown Source)
	at org.apache.derby.impl.store.access.btree.BTreeScan.reposition(Unknown Source)
	at org.apache.derby.impl.store.access.btree.BTreeForwardScan.fetchRows(Unknown Source)
	at org.apache.derby.impl.store.access.btree.BTreeScan.fetchNextGroup(Unknown Source)
	at org.apache.derby.impl.services.daemon.IndexStatisticsDaemonImpl$KeyComparator.fetchRows(Unknown
Source)
	at org.apache.derby.impl.services.daemon.IndexStatisticsDaemonImpl.updateIndexStatsMinion(Unknown
Source)
	at org.apache.derby.impl.services.daemon.IndexStatisticsDaemonImpl.generateStatistics(Unknown
Source)
	at org.apache.derby.impl.services.daemon.IndexStatisticsDaemonImpl.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:619)


Here are some links from sun nightly tests runs showing this error, it happened in a lot of
the runs but not all the ones I looked at.

http://dbtg.foundry.sun.com/derby/test/Daily/jvm1.6/testing/testlog/lin/1069888-suitesAll_diff.txt
http://dbtg.foundry.sun.com/derby/test/Daily/jvm1.6/testing/testlog/sles/1069888-suitesAll_diff.txt
http://dbtg.foundry.sun.com/derby/test/Daily/jvm1.6/testing/testlog/sol/1069888-suitesAll_diff.txt
http://dbtg.foundry.sun.com/derby/test/Daily/jvm1.6/testing/testlog/sol32/1069888-suitesAll_diff.txt

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