WARNING: OUT OF THREADS

dtauzell Mar 6, 2003 11:14 AM

Hi,

I'm running JBoss 3.0.6 with Jetty. I have a load testing tool (Grinder) that is configured to have 10 threads sending requests to JBoss.

I'm seeing the following warnings being written out ever couple of minutes:

09:43:41,290 INFO [jbossweb] LOW ON THREADS: SocketListener@0.0.0.0:8080
09:43:41,802 WARN [jbossweb] WARNING: OUT OF THREADS: SocketListener@0.0.0.0:8080

I ran a stack trace and many of the PoolThread objects show the following:

"PoolThread-34" prio=5 tid=0x951fa8 nid=0x3f waiting for monitor entry [0xea381000..0xea3819d8]
at org.mortbay.http.NCSARequestLog.log(NCSARequestLog.java:357)
at org.mortbay.http.HttpServer.log(HttpServer.java:805)
at org.mortbay.http.HttpContext.log(HttpContext.java:2075)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:1025)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:776)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:202)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:455)

Has anybody seen this before?

1. Re: WARNING: OUT OF THREADS

jules Mar 7, 2003 9:18 AM (in response to dtauzell)

Look in your .../deploy/jbossweb.sar/META-INF/jboss-service.xml

see this ?

10
100
30000
5000

Jetty is configured to start with a pool of 10 request threads, and allocate up to 100 to service requests. When you hit 100 a request has to wait for another to finish before it can reuse it's thread.

It looks like your tool has backed up more than 100 requests. Give Jetty more threads and see what happens.

Jules
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