Re: [Wrapper-user] JVM appears hung: Timed out waiting for signal from JVM. problem

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Hi Leif,

the following is the wrapper.conf:

#********************************************************************
# TestWrapper Properties
#
# NOTE - Please use src/conf/wrapper.conf.in as a template for your
#        own application rather than the values used for the
#        TestWrapper sample.
#********************************************************************
# Java Application
wrapper.java.command=3D/usr/java/jdk1.5.0_07/bin/java

# Java Main class.  This class must implement the WrapperListener =
interface
#  or guarantee that the WrapperManager class is initialized.  Helper
#  classes are provided to do this for you.  See the Integration section
#  of the documentation for details.
#wrapper.java.mainclass=3Dorg.tanukisoftware.wrapper.test.Main
wrapper.java.mainclass=3Dorg.tanukisoftware.wrapper.WrapperStartStopApp

# Java Classpath (include wrapper.jar)  Add class path elements as
#  needed starting from 1
# wrapper.java.classpath.1=3D../lib/wrappertest.jar
# wrapper.java.classpath.2=3D../lib/wrapper.jar
wrapper.java.classpath.1=3D/usr/local/wrapper-linux-x86-32-3.2.3/lib/wrap=
per.jar
wrapper.java.classpath.2=3D/usr/apache-tomcat-5.5.17/bin/bootstrap.jar
wrapper.java.classpath.3=3D/usr/apache-tomcat-5.5.17/bin/commons-logging-=
api.jar
wrapper.java.classpath.4=3D/usr/java/jdk1.5.0_07/lib/tools.jar

# Java Library Path (location of Wrapper.DLL or libwrapper.so)
# wrapper.java.library.path.1=3D../lib
wrapper.java.library.path.1=3D/usr/local/wrapper-linux-x86-32-3.2.3/lib

# Java Additional Parameters
#wrapper.java.additional.1=3D
wrapper.java.additional.1=3D-Djava.endorsed.dirs=3D/usr/apache-tomcat-5.5=
.17/common/endorsed
wrapper.java.additional.2=3D-Dcatalina.base=3D/usr/apache-tomcat-5.5.17
wrapper.java.additional.3=3D-Dcatalina.home=3D/usr/apache-tomcat-5.5.17
wrapper.java.additional.4=3D-Djava.io.tmpdir=3D/usr/apache-tomcat-5.5.17/=
temp
wrapper.java.additional.5=3D-XX:MaxPermSize=3D64m

# Initial Java Heap Size (in MB)
#wrapper.java.initmemory=3D3
wrapper.java.initmemory=3D768

# Maximum Java Heap Size (in MB)
#wrapper.java.maxmemory=3D64
wrapper.java.maxmemory=3D768

# Application parameters.  Add parameters as needed starting from 1
#wrapper.app.parameter.1=3D
wrapper.app.parameter.1=3Dorg.apache.catalina.startup.Bootstrap
wrapper.app.parameter.2=3D1
wrapper.app.parameter.3=3Dstart

wrapper.app.parameter.4=3Dorg.apache.catalina.startup.Bootstrap
wrapper.app.parameter.5=3Dtrue
wrapper.app.parameter.6=3D1
wrapper.app.parameter.7=3Dstop

#********************************************************************
# Wrapper Logging Properties
#********************************************************************
# Format of output for the console.  (See docs for formats)
wrapper.console.format=3DPM

# Log Level for console output.  (See docs for log levels)
wrapper.console.loglevel=3DINFO

# Log file to use for wrapper output logging.
wrapper.logfile=3D/var/log/tomcat/tomcat-1.log

# Format of output for the log file.  (See docs for formats)
wrapper.logfile.format=3DLPTM

# Log Level for log file output.  (See docs for log levels)
wrapper.logfile.loglevel=3DDEBUG

# Maximum size that the log file will be allowed to grow to before
#  the log is rolled. Size is specified in bytes.  The default value
#  of 0, disables log rolling.  May abbreviate with the 'k' (kb) or
#  'm' (mb) suffix.  For example: 10m =3D 10 megabytes.
wrapper.logfile.maxsize=3D0

# Maximum number of rolled log files which will be allowed before old
#  files are deleted.  The default value of 0 implies no limit.
wrapper.logfile.maxfiles=3D0

# Log Level for sys/event log output.  (See docs for log levels)
wrapper.syslog.loglevel=3DDEBUG

wrapper.ping.timeout=3D60
wrapper.statusfile=3D/var/run/tomcat/wrapper_1.status

wrapper.filter.trigger.1=3Djava.lang.OutOfMemoryError
wrapper.filter.action.1=3DRESTART

and we use it for monitor tomcat 5.5.17. and the following is the debug =
log:

DEBUG  | wrapperp | 2007/06/23 16:47:17 | read a packet PING : ok
DEBUG  | wrapper  | 2007/06/23 16:47:17 | Got ping response from JVM
DEBUG  | wrapperp | 2007/06/23 16:47:22 | send a packet PING : ping
INFO   | jvm 2    | 2007/06/23 16:47:22 | Received a packet PING : ping
INFO   | jvm 2    | 2007/06/23 16:47:22 | Send a packet PING : ok
DEBUG  | wrapperp | 2007/06/23 16:47:22 | read a packet PING : ok
DEBUG  | wrapper  | 2007/06/23 16:47:22 | Got ping response from JVM
DEBUG  | wrapperp | 2007/06/23 16:47:26 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:47:31 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:47:35 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:47:40 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:47:44 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:47:49 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:47:53 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:47:58 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:48:02 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:48:07 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:48:11 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:48:16 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:48:20 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:48:25 | send a packet PING : ping
DEBUG  | wrapperp | 2007/06/23 16:48:29 | send a packet PING : ping
ERROR  | wrapper  | 2007/06/23 16:48:32 | JVM appears hung: Timed out =
waiting for signal from JVM.

wrapper seeems hang after this and cannot try to restart JVM. it is so =
strange?

I need to try to increase the value of ping timeout?

Regards

Simon.

----- Original Message -----=20
From: "Leif Mortenson" <le...@ta...>
To: <wra...@li...>
Sent: Sunday, June 24, 2007 8:45 AM
Subject: Re: [Wrapper-user] JVM appears hung: Timed out waiting for =
signal from JVM. problem

> Simon,
> Can you post your wrapper.conf file? Also if you are able to
> reproduce this, can you set the wrapper.debug=3Dtrue property
> and post the resulting wrapper.conf file as well?
>=20
> >From what you posted, it looks like the Wrapper is detecting
> that the JVM is hung, at which point it should be killing and
> restarting the JVM process. I am not clear exactly what you
> are see at that point however.
>=20
> Cheers,
> Leif
>=20
> Simon Chan (Funmobile) wrote:
> > hi all,
> > I am using wrapper to monitor my tomcat 5.5.17 (use java 1.5) now.
> > but I see that it is hung and show the following error:
> > INFO | jvm 1 | 2007/06/22 18:34:25 | Send a packet PING : ok
> > ERROR | wrapper | 2007/06/22 18:35:36 | JVM appears hung: Timed out
> > waiting for signal from JVM.
> > wrapper seems don't try to restart it and just leave it and make
> > tomcat die.
> > do u have any idea?
> > Regards
> > Simon.
> > =
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3:04 PM