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« Return to Thread: Re: Jvm process sometimes hangs and does not respond to ctrl-c
Re: Jvm process sometimes hangs and does not respond to ctrl-c
by Rafael Teixeira
::
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On ARM, using uclibc, we had to patch java thread creation as some
error on pthreads was giving the same PID twice for the creation of
the first secondary thread. That led to strange locks. As we didn't
have the expertise to correct pthreads we patched the creation of
threads in jamvm to just toss out the first created thread and use the
subsequent ones.
Hope it helps,
On 2/20/07, Mattias Bergander <mattias.bergander@...> wrote:
>
>
> Hi again,
> Noone has ever seen this? This is currently a showstopper for us. Any kind
> of feedback would be appreciated.
>
> --
> Mattias Bergander MSc
> Consat Engineering
> Phone: +46 31 340 00 30
>
>
>
> ________________________________
> From: Mattias Bergander
> Sent: Thursday, December 14, 2006 2:47 PM
> To: 'jamvm-general@...'
> Subject: Jvm process sometimes hangs and does not respond to ctrl-c
>
>
>
>
> Hi,
>
> jamvm (1.4.4) works great for us except that it hangs about 1 out of 10
> startups. When this happens CTRL-C can't be used to terminate the process
> and QUIT does not work to get a thread dump on those occasions.
>
> CPU load is next to nothing when this happens.
>
> Platform:
> PPC MPC5200
> Linux eldk 2.1, gcc 2.95.4
> Also tried to compile with disable-int-thread disable-int-direct, no
> difference
> Classpath version: 0.92
>
> Attached are logs when it works fine and when it hangs with verbose jni and
> strace information. Both are zipfiles containing one text-file each, but
> with an extra suffix to get around the zip-file filter on the sf-mailing
> lists.
>
> Does anyone have any ideas what could be the cause of this, or more things
> for us to try?
>
> /mattias & jon
>
> --
> Mattias Bergander MSc
> Consat Engineering
> Phone: +46 31 340 00 30
>
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
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> _______________________________________________
> Jamvm-general mailing list
> Jamvm-general@...
> https://lists.sourceforge.net/lists/listinfo/jamvm-general
>
>
--
Rafael "Monoman" Teixeira
---------------------------------------
"The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all
progress depends on the unreasonable man." George Bernard Shaw
-------------------------------------------------------------------------
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Join SourceForge.net's Techsay panel and you'll get the chance to share your
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_______________________________________________
Jamvm-general mailing list
Jamvm-general@...
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error on pthreads was giving the same PID twice for the creation of
the first secondary thread. That led to strange locks. As we didn't
have the expertise to correct pthreads we patched the creation of
threads in jamvm to just toss out the first created thread and use the
subsequent ones.
Hope it helps,
On 2/20/07, Mattias Bergander <mattias.bergander@...> wrote:
>
>
> Hi again,
> Noone has ever seen this? This is currently a showstopper for us. Any kind
> of feedback would be appreciated.
>
> --
> Mattias Bergander MSc
> Consat Engineering
> Phone: +46 31 340 00 30
>
>
>
> ________________________________
> From: Mattias Bergander
> Sent: Thursday, December 14, 2006 2:47 PM
> To: 'jamvm-general@...'
> Subject: Jvm process sometimes hangs and does not respond to ctrl-c
>
>
>
>
> Hi,
>
> jamvm (1.4.4) works great for us except that it hangs about 1 out of 10
> startups. When this happens CTRL-C can't be used to terminate the process
> and QUIT does not work to get a thread dump on those occasions.
>
> CPU load is next to nothing when this happens.
>
> Platform:
> PPC MPC5200
> Linux eldk 2.1, gcc 2.95.4
> Also tried to compile with disable-int-thread disable-int-direct, no
> difference
> Classpath version: 0.92
>
> Attached are logs when it works fine and when it hangs with verbose jni and
> strace information. Both are zipfiles containing one text-file each, but
> with an extra suffix to get around the zip-file filter on the sf-mailing
> lists.
>
> Does anyone have any ideas what could be the cause of this, or more things
> for us to try?
>
> /mattias & jon
>
> --
> Mattias Bergander MSc
> Consat Engineering
> Phone: +46 31 340 00 30
>
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share your
> opinions on IT & business topics through brief surveys-and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Jamvm-general mailing list
> Jamvm-general@...
> https://lists.sourceforge.net/lists/listinfo/jamvm-general
>
>
--
Rafael "Monoman" Teixeira
---------------------------------------
"The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all
progress depends on the unreasonable man." George Bernard Shaw
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Jamvm-general mailing list
Jamvm-general@...
https://lists.sourceforge.net/lists/listinfo/jamvm-general
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