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https://issues.apache.org/jira/browse/CONNECTORS-114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12920227#action_12920227
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Karl Wright commented on CONNECTORS-114:
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Support added and checked in.
However, when I try to use hsqldb for an actual crawl, in less than 10 seconds
I wind up with a java-level thread deadlock. I've posted the thread dump to
connectors-dev. All the locks seem to be deep inside hsqldb, FWIW, which leads
me to believe that perhaps hsqldb is even less stable than Derby in a
multithread environment.
> Derby seems too unstable in multithreaded situations to be a good database
> for ManifoldCF, so try to add support for HSQLDB
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: CONNECTORS-114
> URL: https://issues.apache.org/jira/browse/CONNECTORS-114
> Project: ManifoldCF
> Issue Type: Bug
> Components: Framework core
> Reporter: Karl Wright
>
> Derby seems to have multiple problems:
> (1) It has internal deadlocks, which even if caught cause poor performance
> due to stalling (CONNECTORS-111);
> (2) It has no support for certain SQL constructs (CONNECTORS-109 and
> CONNECTORS-110);
> (3) It locks up entirely for some people (CONNECTORS-100).
> HSQLDB has been recommended as another potential embedded database that might
> work better.
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