[jboss-jira] [JBoss JIRA] (JGRP-1869) TP.registerProbeHandler not thread safe

[Bela Ban (JIRA)]

     [ https://issues.jboss.org/browse/JGRP-1869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bela Ban updated JGRP-1869:
---------------------------

    Fix Version/s: 3.4.5
                   3.5
         Priority: Minor  (was: Major)


> TP.registerProbeHandler not thread safe
> ---------------------------------------
>
>                 Key: JGRP-1869
>                 URL: https://issues.jboss.org/browse/JGRP-1869
>             Project: JGroups
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 3.2.12
>            Reporter: Dennis Reed
>            Assignee: Bela Ban
>            Priority: Minor
>             Fix For: 3.4.5, 3.5
>
>
> TP.registerProbeHandlers is not thread safe since it modifies preregistered_probe_handlers outside of any synchronization.
> If a thread calls this method while another thread is inside startDiagnostics (which can happen easily with a shared transport), it can cause a NullPointerException when startDiagnostics is looping through preregistered_probe_handlers.
> Access to preregistered_probe_handlers should be synchronized.



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