Re: Temporarily deaf instances
Re: Temporarily deaf instances
- Subject: Re: Temporarily deaf instances
- From: Simon McLean <email@hidden>
- Date: Mon, 24 Mar 2008 19:24:18 +0000
Hi Gary -
We had a lot of problems with deadlocks - permanent and temporary like
you are seeing - when using JMS. The temporary ones appeared like the
instance had suddenly received a ton of synch updates and sat there
churning away at them for a while, then sprung back into life.
JGroups is definitely the way to go. We run a lot of stuff on it now
and it's flawless (he say's, knocking firmly on some wood :-)). We're
pretty much using the default configuration options.
Simon
On 24 Mar 2008, at 19:18, Gary Teter wrote:
This is the new one with JGroups swapped out for JMS.
We tried a TON of different configurations for jgroups and just
couldn't get it running reliably, including using JMS as a transport
for jgroups.
On Mar 24, 2008, at 12:08 PM, Mike Schrag wrote:
We're using an ERXRemoteSynchronizer-derived change notification
system over JMS (openjms-0.7.7-beta-1 running on a different box)
Is this the old JMS remote synchronizer or the new one with JGroups
sending on top of JMS? The old Wonder JMS synchronizer is known
(from anecdotal reports) to have deadlock problems. Regardless,
though, you would see a hung EO stack in your stack dumps (and it
would never come back). It doesn't make sense to me that kill -
QUIT is blocked -- that implies to me that it's something much
lower-level. But you're not getting CPU starvation, because you're
only running at like 2.4% ..... Just thinking out loud here.
ms
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