Hello!
We are running
tomcat6 - Apache Servlet/JSP Engine, RI for Servlet 2.5/JSP 2.1 API
6.0.18-20.3.1
on Suse Linux Enterprise 11
JVM is java-1_6_0-ibm - Java(TM) 6 Runtime Environment 1.6.0_sr7.0-1.6.21
cpu is a quad core cpu with ht (xeon 5500)
The problem is that directly after startup, the java process blocks 1 core
to 100% (seen by 'top').
There are no additional webapps deployed, not even the manager application.
I'm using apache2 2.2.10-2.24.5 with mod_proxy and mod_proxy_ajp, not sure
if I'm also using APR.
Connected by eclipse I discovered the following:
when I suspend thread by thread, the load dropped when I suspend *
"Daemon Thread [Attach handler] (Suspended)".*
... [Remote Java Application]
IBM J9 VM[localhost:19999]
Thread [main] (Suspended)
Daemon Thread [Signal Dispatcher] (Suspended)
* Daemon Thread [Attach handler] (Suspended) *
AttachHandler.
setlastException(Exception) line: 449
AttachHandler.run() line: 165
Daemon Thread
[ContainerBackgroundProcessor[StandardEngine[Catalina]]] (Suspended)
Daemon Thread [TP-Processor1] (Suspended)
Daemon Thread [TP-Processor2] (Suspended)
Daemon Thread [TP-Processor3] (Suspended)
Daemon Thread [TP-Processor4] (Suspended)
Daemon Thread [TP-Monitor] (Suspended)
Daemon Thread [TP-Processor1] (Suspended)
Daemon Thread [TP-Processor2] (Suspended)
Daemon Thread [TP-Processor3] (Suspended)
Daemon Thread [TP-Processor4] (Suspended)
Daemon Thread [TP-Monitor] (Suspended)
The in the context of that thread I discovered that there occured an
exception:
Context @AttachHandler.setlastException(Exception) line: 449
this AttachHandler (id=1972)
lastException IOException (id=1803)
cause IOException (id=1803)
cause IOException (id=1803)
detailMessage "wait error on semaphore _notifier status = -151"
(id=1870)
stackTrace null
walkback (id=1876)
detailMessage "wait error on semaphore _notifier status = -151"
(id=1870)
stackTrace null
walkback (id=1876)
What can I do?
Your help is appreciated ;)
greetings,
Chris
