[jboss-jira] [JBoss JIRA] (JGRP-1663) TimeScheduler3 could spawn too many threads

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-1663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12791098#comment-12791098 ] 

Bela Ban commented on JGRP-1663:
--------------------------------

A timer usually has only a few tasks in it, so additional threads are spawned to handle tasks if the pool is full. It is critical that a timer task (1) never blocks and (2) is never lost, so we cannot simply discard it.
What do you do to end up with 19'000 threads in the timer ?
                
> TimeScheduler3 could spawn too many threads
> -------------------------------------------
>
>                 Key: JGRP-1663
>                 URL: https://issues.jboss.org/browse/JGRP-1663
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 3.3.3
>            Reporter: Igor Mazur
>            Assignee: Bela Ban
>            Priority: Optional
>             Fix For: 3.4
>
>
> With default timer thread pool settings this code could spawn thousands of threads:
> protected void submitToPool(final Task entry) {
>         try {
>             pool.execute(entry);
>         }
>         catch(RejectedExecutionException rejected) { // only thrown if rejection policy is "abort"
>             Thread thread=timer_thread_factory != null?
>               timer_thread_factory.newThread(entry, "Timer temp thread")
>               : new Thread(entry, "Timer temp thread");
>             thread.start();
>         }
>     }
> On my environment I got 19000 threads.

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