Menu
▾
▴
Re: [Wrapper-user] Application Stopped Unexpected and amazingly
|
From: jawad b. <bok...@ya...> - 2005-04-29 18:09:05
|
Thanks for your valuable information. Regards, jawad --- Leif Mortenson <le...@ta...> wrote: > Jawad, > The timing bug is well understood and I am 100% > sure that it has > been fixed. > Versions earlier to 3.1.0 were all fine, but in > 3.1.0 I reworked the > internal timing > a bit so I could start experimenting with the new > Tick based timer that > will be > standard in 3.2.0. When I did this, I made what I > thought was an innocuous > change. The tick counters use a 32 bit integer to > count the ticks. It > is expected > to roll over and is set up to happen 10 minutes > after starting so it is > well tested > through use. > > The problem was that when using the old system > based timer, the code > which > converted the system time into a tick count had a > bug that would cause a > huge > jump in the tick count at very specific times. > This would look like > the Wrapper > or JVM had been hung for several hours and it would > trigger all kinds of > timeouts. > > That conversion has now been fixed in 3.1.2 and > has been working great. > > Cheers, > Leif > > > > jawad bokhari wrote: > > >Dear Leif, > > > >Yes, I was using version 3.1.0. > >I didn't review updates on the site for newer > version > >because this old version was even working perfectly > >for me. > > > >Can I find some more information about this timing > >bug? > > > >However, I'll upgrade to version 3.1.2 now and see > if > >it happens again. > > > >I set log-level to ERROR because I am using my own > >written logging application similar to log4j and > that > >is configured my application internally. > >If application crashes due to any reason, my > logging > >module informs me of that. > > > >But through logs I noticed that application was > >stopped normally and application didn't notice any > >severity inside. It just received a stop signal > just > >like a normal application-stop. > > > >Thanks a lot for your quick attention and I'll > apply > >the latest updates now. > > > >I would appreciate if you can give me some more > >information on timing-bug problem that caused this. > > > > > >Regards, > > > >Jawad > > > > > > > > > > > > > > > > > > > > > >--- Leif Mortenson <le...@ta...> wrote: > > > > > >>Jawad, > >> What version are you using? The only thing > that > >>I am aware of that could > >>have possibly caused that is a timing bug in bug > in > >>3.1.0 and 3.1.1. It was > >>fixed in 3.1.2. From the release notes: > >> > >>* Fix a problem where the JVM would restart at > >>certain times when using the > >> system time based timer due to an overflow > error. > >>This problem was > >> introduced in 3.1.0. Due to a separate bug in > >>3.1.0, the Wrapper would > >> shutdown rather than simply restarting the JVM > as > >>was happening in 3.1.1. > >> The last restart happened on Aug 21, 2004. It > >>will next occur Oct 10, > >>2004 > >> and repeat at regular intervals. There are no > >>problems when using the new > >> Tick based timer. Bug #1014405. > >> > >> Also, what is the reason that you are setting > >>your log level to ERROR? > >>The way I designed the Wrapper, that is in general > a > >>bad idea as it > >>hides all > >>of the output that you will need to recover from a > >>problem. If the problem > >>is that your Java application is sending too much > >>output to its console, > >>then > >>I would suggest using a Java side logging system > >>like log4j or LogKit to > >>reduce or redirect that output. > >> Depending on your answer here, I may be able > to > >>come up with a change > >>to the Wrapper to resolve whatever problem you had > >>been having as well. > >> > >>Cheers, > >>Leif > >> > >>jawad bokhari wrote: > >> > >> > >> > >>>I recently noticed an amazingly strange problem > in > >>>using wrapper for my applicaiton. > >>> > >>>Application stopped working at 5 different > servers > >>> > >>> > >>at > >> > >> > >>>sametime. > >>>I couldnt' see any wrapper.log having my log > level > >>> > >>> > >>set > >> > >> > >>>to ERROR. I dont' see any error in my > application's > >>>log. > >>> > >>>But it suddenly happenend so. > >>>I wonder if there's some ping like application > that > >>>keep monitoring the service and stops the service > >>>externally. > >>> > >>>Anything I should investigate in wrapper > >>>configurations? > >>> > >>> > >>>Regards, > >>> > >>>Jawad > >>> > >>> > >>> > >>> > >> > >> > >> > >> > >------------------------------------------------------- > > > > > >>SF.Net email is sponsored by: Tell us your > software > >>development plans! > >>Take this survey and enter to win a one-year sub > to > >>SourceForge.net > >>Plus IDC's 2005 look-ahead and a copy of this > survey > >>Click here to start! > >>http://www.idcswdc.com/cgi-bin/survey?id=105hix > >>_______________________________________________ > >>Wrapper-user mailing list > >>Wra...@li... > >> > >> > >> > >https://lists.sourceforge.net/lists/listinfo/wrapper-user > > > > > > > >__________________________________________________ > >Do You Yahoo!? > >Tired of spam? Yahoo! Mail has the best spam > protection around > >http://mail.yahoo.com > > > > > >------------------------------------------------------- > >SF.Net email is sponsored by: Tell us your software > development plans! > >Take this survey and enter to win a one-year sub to > SourceForge.net > >Plus IDC's 2005 look-ahead and a copy of this > survey > >Click here to start! > http://www.idcswdc.com/cgi-bin/survey?id=105hix > >_______________________________________________ > >Wrapper-user mailing list > >Wra...@li... > >https://lists.sourceforge.net/lists/listinfo/wrapper-user > > > > > > > > > > ------------------------------------------------------- > SF.Net email is sponsored by: Tell us your software > development plans! > Take this survey and enter to win a one-year sub to > SourceForge.net > Plus IDC's 2005 look-ahead and a copy of this survey > Click here to start! > http://www.idcswdc.com/cgi-bin/survey?id=105hix > _______________________________________________ > Wrapper-user mailing list > Wra...@li... > https://lists.sourceforge.net/lists/listinfo/wrapper-user > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com |
