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From "Edward Howe (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (DERBY-6833) NPE in IndexRowGenerator.getExecutionFactory()
Date Mon, 21 Sep 2015 12:48:04 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14900573#comment-14900573
] 

Edward Howe edited comment on DERBY-6833 at 9/21/15 12:47 PM:
--------------------------------------------------------------

Question: I'm looking at ContextService.stop().  It looks like the factory member is accessible
after its members are nulled but before the member itself is nulled. Could this be causing
getFactory() to return null rather than throw a ShutdownException?  (I see the fix for DERBY-5088
has a comment expecting ContextService.getFactory() to possibly fail with a ShutdownException,
but not by returning null.)


was (Author: ehowe):
Question: I'm looking at ContextService.stop().  It looks like the factory member is accessible
after its members are nulled but before the member itself is nulled. Could this be causing
getFactory() to return null rather than throw a ShutdownException?

> NPE in IndexRowGenerator.getExecutionFactory()
> ----------------------------------------------
>
>                 Key: DERBY-6833
>                 URL: https://issues.apache.org/jira/browse/DERBY-6833
>             Project: Derby
>          Issue Type: Bug
>          Components: Miscellaneous
>    Affects Versions: 10.11.1.1
>         Environment: Tue Sep 08 19:39:37 EDT 2015:
> Booting Derby version The Apache Software Foundation - Apache Derby - 10.11.1.1 - (1616546):
instance a816c00e-014f-af54-3c5f-0000350a3da0 
> on database directory /mnt/raid0/jenkins/grid/main/deployment/integration-tests/build/grid/var/apps/archive/database/jyrusNodeDb
with class loader sun.misc.Launcher$AppClassLoader@7852e922 
> Loaded from file:/mnt/raid0/jenkins/grid/main/deployment/integration-tests/build/grid/lib/derby-10.11.1.1.jar
> java.vendor=Oracle Corporation
> java.runtime.version=1.8.0_45-b14
> user.dir=/mnt/raid0/jenkins/grid/main/deployment/integration-tests/build/grid/bin
> os.name=Linux
> os.arch=amd64
> os.version=2.6.32-431.29.2.el6.x86_64
> derby.system.home=null
> Database Class Loader started - derby.database.classpath=''
>            Reporter: Edward Howe
>            Priority: Critical
>
> Derby crashed with the following stack trace while running our application's integration
tests.  This is the first time I've seen this, and cannot reproduce it.  It happened during
our application's startup.  The embedded database had been opened by this point, and some
initial queries had been executed.  
> java.lang.NullPointerException: null
> 	at org.apache.derby.iapi.sql.dictionary.IndexRowGenerator.getExecutionFactory(Unknown
Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.iapi.sql.dictionary.IndexRowGenerator.getIndexRowTemplate(Unknown
Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.iapi.sql.dictionary.IndexRowGenerator.getNullIndexRow(Unknown Source)
~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.services.daemon.IndexStatisticsDaemonImpl.updateIndexStatsMinion(Unknown
Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.services.daemon.IndexStatisticsDaemonImpl.generateStatistics(Unknown
Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.services.daemon.IndexStatisticsDaemonImpl.processingLoop(Unknown
Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.services.daemon.IndexStatisticsDaemonImpl.run(Unknown Source)
~[derby-10.11.1.1.jar:na]
> 	at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_45]



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