[jboss-jira] [JBoss JIRA] (WFCORE-1934) Make number of thread size for ServerService Thread Pool configurable

[Masafumi Miura (JIRA)]

     [ https://issues.jboss.org/browse/WFCORE-1934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Masafumi Miura updated WFCORE-1934:
-----------------------------------
    Issue Type: Enhancement  (was: Bug)


> Make number of thread size for ServerService Thread Pool configurable
> ---------------------------------------------------------------------
>
>                 Key: WFCORE-1934
>                 URL: https://issues.jboss.org/browse/WFCORE-1934
>             Project: WildFly Core
>          Issue Type: Enhancement
>          Components: Server
>    Affects Versions: 2.2.0.Final
>            Reporter: Masafumi Miura
>            Assignee: Jason Greene
>         Attachments: ServerServiceThreadPool_ejb_startup_singleton.zip, ServerServiceThreadPool_persistence_unit.zip
>
>
> Provide a way to configure {{maximumPoolSize}} of {{ServerService Thread Pool}}. It defaults to {{Integer.MAX_VALUE}} and it's unable to be changed in the current implementation:
>  
> {quote}
> https://github.com/wildfly/wildfly-core/blob/master/server/src/main/java/org/jboss/as/server/ServerService.java#L446-L449
> {code}
> 446         public synchronized void start(StartContext context) throws StartException {
> 447             executorService = new ThreadPoolExecutor(0, Integer.MAX_VALUE, 20L, TimeUnit.SECONDS,
> 448                     new SynchronousQueue<Runnable>(), threadFactory);
> 449         }
> {code}
> {quote}
> Though the threads will disappear after 20 seconds of finishing a task, ulimit ({{nproc}}, max user processes) has a possibility to run out and "java.lang.OutOfMemoryError: unable to create new native thread" would occur depending on deployed applications. For example, an application coming with many {{<persistence-unit>}} entries in {{persistence.xml}} or a lot of @Startup @Singleton EJB can cause spawning a lot of {{ServerService Thread Pool}} thread.
> Even if ulimit can be configurable and it is recommended to be tuned in a production environment, making {{maximumPoolSize}} of {{ServerService Thread Pool}} configurable would be helpful.



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