On 05/10/2010 11:35 PM, Ben Knight wrote:
Apache version: 2.2.3
JBoss version: 5
JBoss Web: 2.1.3.GA<http://2.1.3.ga/>
mod_jk: 1.2.30
We are inconsistently seeing an issue in our production environment where
our AJP queues between Apache and Jboss as shown in the JMX console fill up
with requests to the point where the application server is no longer taking
on any new requests. When looking at all involved system components (overall
traffic, load db, process list db, load of all clustered application server
nodes) nothing points towards a capacity issue which would explain why the
calls are being stalled in the AJP queue. Instead all systems appear
sufficiently idle.
Those symptoms look like an application deadlock.
Thread dump of the Java server processes at time of the hang might
well help (hoping that the deadlock is not bad enough to prohibit
logging the thread dump).
--
..Juha
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