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

[Dennis Reed (JIRA)]

Dennis Reed created JGRP-1869:
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             Summary: 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


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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