Re: [wildfly-dev] Gathering diagnostic data

From: "Brian Stansberry" <brian.stansberry(a)redhat.com&gt; To: wildfly-dev(a)lists.jboss.org Sent: Tuesday, February 25, 2014 9:11:15 PM Subject: Re: [wildfly-dev] Gathering diagnostic data On 2/25/14, 9:30 PM, David M. Lloyd wrote: > On 02/25/2014 09:26 PM, James Livingston wrote: >> Hi, >> >> I do support for JBoss at RH, especially lower level components >> like the >> JVM and core server, and I've come to realise that we don't have >> particularly good mechanisms for gathering diagnostic data. >> Obviously >> there is logging, but for a number of problems it isn't enough. >> There is >> also the JDR subsystem, but that has the serious limitation that >> the >> server instance(s) have to be working correctly to use it. >> >> >> One piece of data that I think can be useful for a common set of >> problems are thread dumps. For standalone instances >> Oracle/OpenJDK's >> 'jstack' tool is useful, but for domain mode you need to manually >> go to >> each machine and find the correct process ID to use it. Something >> that >> could potentially be useful is to be able to tell Host Controllers >> to >> take a thread dump from the servers it manages (or all of them), >> using >> the same Attach/SA APIs as jstack. >> >> A feature to allow HC-based extensions as mentioned in the thread >> about >> the RHQ agent could be useful for implementing this too. Right >> now, I >> believe it would need to be added to the HC code directly. >> >> >> Is this something that might be possible or a good idea to do? I >> have >> some ideas about other things that may be useful, like per-thread >> CPU >> usage which RH support currently uses a pile of shell scripts for, >> but >> starting with one thing may be simpler. > > I believe that the management model that is already defined for > host > controllers' views of their servers could easily accommodate this > kind > of thing. I don't think it'd have to be an extension - in fact, it > probably should not be in this case. > > Agreed. -- Brian Stansberry Senior Principal Software Engineer JBoss by Red Hat _______________________________________________ wildfly-dev mailing list wildfly-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/wildfly-dev