Hi all,
This problem is very common with Tapestry applications. This is due to
the fact that Tapestry uses cglib to generate classes at runtime.
Java uses a separate Heap space called "PermGenSpace" to put meta-data
about classes, which is never garbage collected (this is "normal" since
normally, classes never change...) but with cglib, classes are
generated, which add to the PermGenSpace. And the next time your
application is deployed, new classes are generated which add to the
PermGenSpace, etc... So it fills and become full.
So this problem is common to Java+Tapestry/cglib+deployed webapps.
I hope this explaination is clear. Else ask questions.
-jec
Harvey, David a écrit :
Hello all,
We've been having occasional problems with PermGen out of space errors
thrown during the execution of our Tapestry application. We usually get
a stack trace with something about hivemind at the top (see below).
Then, of course, we have to restart our app server. Our environment is
Tapestry 4.0.1 and Tacos4-Beta3
Jboss 4.0.3 sp1 (Tomcat 5.5 embedded)
JRE 1.5.0_03
The java runtime is initialized with
-XX:PermSize=96M -XX:MaxPermSize=128M
The stack trace we get at various times is:
2006-07-20 17:25:11,415 ERROR
[net.sf.tacos.ajax.impl.AjaxDirectServiceImpl] Error invoking listener
on component $AjaxForm_40
org.apache.hivemind.ApplicationRuntimeException: PermGen space
[context:/WEB-INF/pages/claims/addEdit.page, line 6, column 93]
at
org.apache.tapestry.engine.RequestCycle.rewindForm(RequestCycle.java:461
)
at
net.sf.tacos.ajax.components.AjaxForm.trigger(AjaxForm.java:418)
at
net.sf.tacos.ajax.impl.AjaxDirectServiceImpl.triggerComponent(AjaxDirect
ServiceImpl.java:348)
.
.
.
Caused by: java.lang.OutOfMemoryError: PermGen space
Anybody have any clues as to what we can do about this?
Regards,
David Harvey
Ingenix, Inc.
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