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https://issues.apache.org/jira/browse/DERBY-6833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14741870#comment-14741870
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Mike Matrigali commented on DERBY-6833:
---------------------------------------
is it likely or not that your system may have been executing something that
would have been creating an index "around" the time of the error?
A number of ddl options might do this:
create index
add constraint
offline compress
some versions of add and drop column
...
> 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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