JGroups Troubleshooting Techniques: Difference between revisions

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* [[JGroups#Subjects|JGroups]]
* [[JGroups#Subjects|JGroups]]
=Verbose Logging=
=Suspend JVM Execution=
A JVM running JGroups can be suspended from executing by sending the  [[Linux Signals#SIGSTOP_.2819.29|SIGSTOP]] signal into it:
<pre>
kill -SIGSTOP <jvm-pid>
</pre>
Execution can be later resumed by sending [[Linux Signals#SIGCONT_.2818.29|SIGCONT]]:
<pre>
kill -SIGCONT <jvm-pid>
</pre>
Also see [[Linux Signals#SIGSTOP_.2819.29|SIGSTOP]] and [[Linux Signals#SIGCONT_.2818.29|SIGCONT]].
=Practical Ways to Determine the Current View=
* [[JGroups Protocol GMS#Current_Group_Membership|Group Membership based on GMS log entries]]
* [[JGroups Protocol FD_SOCK#VIEW_CHANGE|Group Membership based on FD_SOCK VIEW_CHANGE log entries]]
* [[WildFly CLI - Obtaining the Current JGroups View|Current view obtained with the WildFly CLI]]
=Threads=
<font color=red>Look at threads: (regular,timer,OOB)</font>.

Latest revision as of 17:01, 6 March 2016

Internal

Verbose Logging

Suspend JVM Execution

A JVM running JGroups can be suspended from executing by sending the SIGSTOP signal into it:

kill -SIGSTOP <jvm-pid>

Execution can be later resumed by sending SIGCONT:

kill -SIGCONT <jvm-pid>

Also see SIGSTOP and SIGCONT.

Practical Ways to Determine the Current View

Threads

Look at threads: (regular,timer,OOB).