Hello all.
I need to finally find the cause of this problem.
I have an HP webserver running HP-UX 11, 3GB RAM.
One running Apache2, with 5 TomCat4, one for each
project. Java1.4 (/opt/java1.4/bin/PA_RISC2.0/java).
One of this TomCat is very requested and it crash
quite every day. I wrote a monitoring process
which restart it when missing.
But I need to understand why this arrives.
This single TomCat starts with java param -Xmx576m,
the others four with -Xmx192m.
I also tried following options, but without
relevant success:
-Xoptgc -Xincgc -Xconcgc
-XX:+DisableExplicitGC -XX:-ImplicitNullChecks
-XX:NewSize=128m -XX:MaxNewSize=128m
In my jsp source files I have following options:
<%@ page
// ...
buffer="24kb" autoFlush="true"
// ...
%>
In the catalina.out file I found several lines like this:
Apr 5, 2005 11:38:36 AM
org.apache.jk.common.ChannelSocket processConnection
INFO: server has been restarted or reset this connection
And, when TomCat crashes, I found lines like this:
Exception in thread "CompileThread0"
java.lang.OutOfMemoryError: requested 60488 bytes
for Chunk::new . Possible causes:
- not enough swap space left, or
- kernel parameter MAXDSIZ is very small.
Out of memory while reading in symbol table of
/opt/java1.4/jre/lib/PA_RISC2.0/server/libjvm.sl
Stack_Trace: error while unwinding stack
( 0) 0xc1bfaac0 [/opt/java1.4/jre/lib/PA_RISC2.0/server/libjvm.sl]
...
(16) 0xc13a9f60 __pthread_create_system + 0x420 [/usr/lib/libpthread.1]
Java out of memory messages are marked with pid: 275
in /var/adm/syslog/syslog.log.
I cannot add ram, and the maxdsiz kernel parameter is 67108864
(maxdsiz_64bit has value 1073741824).
The swapinfo command says following:
Kb Kb Kb PCT
TYPE AVAIL USED FREE USED
dev 2097152 0 2097152 0%
reserve - 415376 -415376
memory 2311928 469152 1842776 20%
Thank you for any hint on how to solve my problem.
Best regards,
Stefano
---
Stefano Unternaehrer - 6500 Bellinzona - 091 8141513
- Informatico Sbt - Sistema bibliotecario ticinese -
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