[jboss-jira] [JBoss JIRA] (DROOLS-473) Drools spawning a lot of JIT threads

[Frank Pavageau (JIRA)]

Frank Pavageau created DROOLS-473:
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             Summary: Drools spawning a lot of JIT threads
                 Key: DROOLS-473
                 URL: https://issues.jboss.org/browse/DROOLS-473
             Project: Drools
          Issue Type: Enhancement
      Security Level: Public (Everyone can see)
    Affects Versions: 5.5.0.Final
            Reporter: Frank Pavageau
            Assignee: Mark Proctor


{{MvelConstraint}} submits JIT tasks to an {{Executor}} once it has been evaluated enough times, but that {{Executor}} created by {{ExecutorProviderImpl}} is a basic {{CachedThreadPool}} which can create an unbounded number of threads (though they die after idling for a minute).

Firing a lot of rules quickly can create several hundreds threads. If you have several JVMs on the same machine processing the same kind of load, it can saturate the OS and result in errors as the JVMs cannot create native threads anymore.

The maximum size of the thread pool should probably be limited to a more reasonable default, maybe with a configurable value.

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