[jboss-jira] [JBoss JIRA] Resolved: (JGRP-239) FD_SOCK.interruptPingerThread() can cause NPEs

[Bela Ban (JIRA)]

     [ http://jira.jboss.com/jira/browse/JGRP-239?page=all ]

Bela Ban resolved JGRP-239.
---------------------------

    Resolution: Done

Added synchronization around pinger_thread

> FD_SOCK.interruptPingerThread() can cause NPEs
> ----------------------------------------------
>
>                 Key: JGRP-239
>                 URL: http://jira.jboss.com/jira/browse/JGRP-239
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 2.3, 2.2.9.2, 2.2.9.1, 2.2.9, 2.2.8
>            Reporter: Bela Ban
>         Assigned To: Bela Ban
>             Fix For: 2.4
>
>
> [email from Bruce Schuchardt]
> I doubt that I could reproduce it, but one of our apps ran into a NPE in FD_SOCK.interruptPingerThread on this line
>         if(pinger_thread != null && pinger_thread.isAlive()) {
> This was during the  passing down of a new view from pbcast.GMS.installView.
> It looks like some synchronization is needed for this check in a few places in FD_SOCK. 

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