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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 49249] GC overhead limit exceeded when download large files from keep-alive-enabled clustered tomcats
Date Wed, 05 May 2010 06:16:18 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=49249

--- Comment #2 from iJay <mustangxu@gmail.com> 2010-05-05 02:16:12 EDT ---
(In reply to comment #1)
> A quick search gives me this reference:
> http://java.sun.com/javase/technologies/hotspot/gc/gc_tuning_6.html#par_gc.oom
> "The parallel collector will throw an OutOfMemoryError if too much time is
> being spent in garbage collection"
> 
> Out of memory errors mean that you must profile your own application to
> identify the root cause. See users@ list archives for further pointers.
> 
> http://wiki.apache.org/tomcat/OutOfMemory
> http://tomcat.apache.org/bugreport.html#Bugzilla_is_not_a_support_forum
> 
> Closing as INVALID, because there is no Tomcat issue here.

I am not a new developer to Java and do know what is a OutOfMemoryError. This
application is only a servlet generating dynamic JNLP file and providing JRE
download. It ran smoothly during the past one year with load. After we turned
"keep alive" on in apache a few days ago, Tomcat crashed this morning. Then we
turned it back to off and now it serves with no error.
My team supposed that if download a large file from tomcat with keep-alive
connection, since all the requests from the same user use the same connection,
maybe the stream buffer doesn't close correctly during the download and then
cause this ERROR. Pls check in this bug and validate it with patience.

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