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Re: [Wrapper-user] Wrapper shuts down on Linux
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From: David H. <dho...@gm...> - 2008-09-04 23:19:45
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Leif, I have made the debug change to the conf file. Previously I had bumped up the timeout to 60 seconds so who knows it may not happen again. Ideally, since I have seen this happen twice now, is that I would like an auto retry/restart feature so that it will continually try to restart if for whatever reason it shuts down. Is this possible on Linux? -Dave On Thu, Sep 4, 2008 at 10:00 AM, Leif Mortenson <le...@ta...>wrote: > David, > Assuming that the Wrapper has been working correctly for a few days as > you say, I am unsure as to what is happening here with just the > information you provided. > Could you please set the wrapper.debug=true property and reproduce > this? Then send me the resulting full wrapper.log file to my email > directly as it is large for the list. > > >From the log, the JVM appears to have frozen and was killed for some > reason. When the Wrapper then attempts to relaunch the JVM process, > it fails to start within 30 seconds. > > What is the status of your system when this happens? Is it possible > that the system is being bogged down by another process? If the JVM > is failing to receive any CPU for a long period of time, it could > appear to be frozen. That would also explain why it would take a long > time for the next JVM invocation to start up. In either case, there > are timeouts which can be extended to avoid this problem. > > Cheers, > Leif > > On Thu, Sep 4, 2008 at 11:47 AM, David Hoffer <dho...@gm...> wrote: > > I am using the wrapper on Linux running as a daemon. For some reason > after > > running for a while (few days) it shuts down. Here is the log: > > > > INFO | jvm 1 | 2008/08/31 15:22:52 | > > -------------------------------------- > > ERROR | wrapper | 2008/09/02 07:49:32 | JVM appears hung: Timed out > > waiting for signal from JVM. > > ERROR | wrapper | 2008/09/02 07:49:33 | JVM did not exit on request, > > terminated > > STATUS | wrapper | 2008/09/02 07:49:40 | Launching a JVM... > > ERROR | wrapper | 2008/09/02 07:50:10 | Startup failed: Timed out > waiting > > for a signal from the JVM. > > ADVICE | wrapper | 2008/09/02 07:50:10 | > > ADVICE | wrapper | 2008/09/02 07:50:10 | > > ------------------------------------------------------------------------ > > ADVICE | wrapper | 2008/09/02 07:50:10 | Advice: > > ADVICE | wrapper | 2008/09/02 07:50:10 | The Wrapper consists of a > native > > component as well as a set of classes > > ADVICE | wrapper | 2008/09/02 07:50:10 | which run within the JVM that > it > > launches. The Java component of the > > ADVICE | wrapper | 2008/09/02 07:50:10 | Wrapper must be initialized > > promptly after the JVM is launched or the > > ADVICE | wrapper | 2008/09/02 07:50:10 | Wrapper will timeout, as just > > happened. Most likely the main class > > ADVICE | wrapper | 2008/09/02 07:50:10 | specified in the Wrapper > > configuration file is not correctly initializing > > ADVICE | wrapper | 2008/09/02 07:50:10 | the Wrapper classes: > > ADVICE | wrapper | 2008/09/02 07:50:10 | > > com.dhs.service.JavaServiceWrapperWebServiceLauncher > > ADVICE | wrapper | 2008/09/02 07:50:10 | While it is possible to do so > > manually, the Wrapper ships with helper > > ADVICE | wrapper | 2008/09/02 07:50:10 | classes to make this > > initialization processes automatic. > > ADVICE | wrapper | 2008/09/02 07:50:10 | Please review the integration > > section of the Wrapper's documentation > > ADVICE | wrapper | 2008/09/02 07:50:10 | for the various methods which > can > > be employed to launch an application > > ADVICE | wrapper | 2008/09/02 07:50:10 | within the Wrapper: > > ADVICE | wrapper | 2008/09/02 07:50:10 | > > http://wrapper.tanukisoftware.org/doc/english/integrate.html > > ADVICE | wrapper | 2008/09/02 07:50:10 | > > ------------------------------------------------------------------------ > > ADVICE | wrapper | 2008/09/02 07:50:10 | > > ERROR | wrapper | 2008/09/02 07:50:11 | JVM did not exit on request, > > terminated > > STATUS | wrapper | 2008/09/02 07:50:11 | JVM received a signal SIGKILL > (9). > > STATUS | wrapper | 2008/09/02 07:50:16 | Launching a JVM... > > ERROR | wrapper | 2008/09/02 07:50:46 | Startup failed: Timed out > waiting > > for a signal from the JVM. > > ADVICE | wrapper | 2008/09/02 07:50:46 | > > > > What may be causing this? I am not a Linux guur. I have used the > wrapper > > on Windows with no issues. My code to handle controlEvents is: > > > > if (WrapperManager.isControlledByNativeWrapper()) { > > // The Wrapper will take care of this event > > } else { > > // We are not being controlled by the Wrapper, so > > // handle the event ourselves. > > if ((event == WrapperManager.WRAPPER_CTRL_C_EVENT) || > (event > > == WrapperManager.WRAPPER_CTRL_CLOSE_EVENT) || (event == > > WrapperManager.WRAPPER_CTRL_SHUTDOWN_EVENT)) { > > log.warn("We are handling the received event > ourselves > > and we are stopping the service"); > > WrapperManager.stop(0); > > } > > } > > > > I am using the wrapper integrated, that is I implement WrapperListener > > interface. > > > > Since I am running as a daemon, I don't want this to ever shut down, and > if > > does for some reason I would like it to auto restart (don't know how to > do > > this on Linux). > > > > Why might I be getting these JVM appears hung: Timed out waiting for > signal > > from JVM. errors? > > > > -Dave > > > > ------------------------------------------------------------------------- > > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > > Build the coolest Linux based applications with Moblin SDK & win great > > prizes > > Grand prize is a trip for two to an Open Source event anywhere in the > world > > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > > _______________________________________________ > > Wrapper-user mailing list > > Wra...@li... > > https://lists.sourceforge.net/lists/listinfo/wrapper-user > > > > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Wrapper-user mailing list > Wra...@li... > https://lists.sourceforge.net/lists/listinfo/wrapper-user > |
