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https://issues.apache.org/jira/browse/CONNECTORS-1581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16766037#comment-16766037
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Karl Wright commented on CONNECTORS-1581:
-----------------------------------------
It's possible that the problem is due to funkiness in MySQL. We've had a lot
of trouble lately because MySQL no longer seems to be properly enforcing
transaction integrity in at least some circumstances. OR it could be the
open-source MySQL driver we're using; maybe that needs an upgrade?
At any rate, removal of jobqueue rows MUST precede removal of job table rows;
there's a constraint in place in fact. So if you get to the point where that
constraint has been violated, you're pretty certain it's a database issue. :-(
> [Set priority thread] Error tossed: null during startup
> -------------------------------------------------------
>
> Key: CONNECTORS-1581
> URL: https://issues.apache.org/jira/browse/CONNECTORS-1581
> Project: ManifoldCF
> Issue Type: Bug
> Environment: • ManifoldCF 2.12, running in a Docker Container
> based on Redhat Linux, OpenJDK 8
> • AWS RDS Database (Aurora MySQL -> 5.6 compatible, utf8 (collation
> utf8_bin))
> • Single Process Setup
> Reporter: Markus Schuch
> Assignee: Markus Schuch
> Priority: Major
>
> We see the following {{NullPointerException}} at startup:
> {code}
> [Set priority thread] FATAL org.apache.manifoldcf.crawlerthreads- Error
> tossed: null
> java.lang.NullPointerException
> at
> org.apache.manifoldcf.crawler.system.ManifoldCF.writeDocumentPriorities(ManifoldCF.java:1202)
> at
> org.apache.manifoldcf.crawler.system.SetPriorityThread.run(SetPriorityThread.java:141)
> {code}
> What could be the cause of that?
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