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Re: [naviserver-devel] "pthread_join failed in Ns_ThreadJoin: Invalid argument"
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From: Gustaf N. <ne...@wu...> - 2015-03-26 11:18:51
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Hi David,
We have this issue of shutdown in test-cases and during server shutdown
since
several years. It is annoying, but mostly harmless. The last time i
looked into
the problem, i got the impression that it depends on a not fully predictable
shutdown order, which is not completely in our hands due to tcl
interactions.
i would be alert, if you see this problem in other situations. For our
production
system, i saw the last crash months ago (happend due to a Tcl-bug with
doubling the size of a dstring over 2gb). Another "crash" on a different
system
turned out to be due to linux's oom killer.
-g
Am 26.03.15 um 11:42 schrieb David Osborne:
> Hi again,
>
> We've been getting an intermittent server crash on our live system for
> a while now which hits us every weeks or so.
>
> The nsd daemon crashes with the above error and daemontools restarts it.
> Having done a search I believe this is seen sometimes on server
> shutdown where it's pretty harmless... but in these cases the server
> is not (expectedly) shutting down.
>
> We've now managed to get a core dump of the most recent occurrence.
> Is anyone able to give us any pointers on how we can try to narrow
> this down?
>
> It's Naviserver 4.99.7 (but was also happening in 4.99.6 - and I think
> 4.99.5) on Debian 7.7 (Wheezy) and Tcl 8.5.11-2
>
>
> [-conn:tlc_erp:20-] Fatal: nsthreads: pthread_join failed in
> Ns_ThreadJoin: Invalid argument
>
> (gdb) bt
> #0 0x00007f5858d39165 in raise () from /lib/x86_64-linux-gnu/libc.so.6
> #1 0x00007f5858d3c3e0 in abort () from /lib/x86_64-linux-gnu/libc.so.6
> #2 0x00007f5859ee9639 in Panic (fmt=<optimized out>) at log.c:707
> #3 0x00007f58595d6e12 in Tcl_PanicVA () from /usr/lib/libtcl8.5.so.0
> #4 0x00007f58595d6f8c in Tcl_Panic () from /usr/lib/libtcl8.5.so.0
> #5 0x00007f585984e6f0 in NsThreadFatal (func=<optimized out>,
> osfunc=<optimized out>, err=<optimized out>) at error.c:62
> #6 0x00007f5859850561 in Ns_ThreadJoin (thread=<optimized out>,
> argPtr=<optimized out>) at pthread.c:459
> #7 0x00007f5859ef0ffc in JoinConnThread (threadPtr=0x7f585181dda0) at
> queue.c:1688
> #8 NsConnThread (arg=0x2db7d70) at queue.c:1368
> #9 0x00007f585984f8ac in NsThreadMain (arg=<optimized out>) at
> thread.c:227
> #10 0x00007f5859850899 in ThreadMain (arg=<optimized out>) at
> pthread.c:809
> #11 0x00007f58588edb50 in start_thread () from
> /lib/x86_64-linux-gnu/libpthread.so.0
> #12 0x00007f5858de370d in clone () from /lib/x86_64-linux-gnu/libc.so.6
> #13 0x0000000000000000 in ?? ()
>
> (gdb) frame 8
> #8 NsConnThread (arg=0x2db7d70) at queue.c:1368
> 1368 JoinConnThread(&joinThread);
> (gdb) list
> 1363 }
> 1364
> 1365 joinThread = servPtr->pools.joinThread;
> 1366 Ns_ThreadSelf(&servPtr->pools.joinThread);
> 1367 if (joinThread != NULL) {
> 1368 JoinConnThread(&joinThread);
> 1369 }
> 1370
> 1371 Ns_Log(Notice, "exiting: %s", exitMsg);
> 1372
> (gdb) frame 7
> #7 0x00007f5859ef0ffc in JoinConnThread (threadPtr=0x7f585181dda0) at
> queue.c:1688
> 1688 Ns_ThreadJoin(threadPtr, &argArg);
> (gdb) list
> 1683 {
> 1684 void *argArg;
> 1685
> 1686 assert(threadPtr != NULL);
> 1687
> 1688 Ns_ThreadJoin(threadPtr, &argArg);
> 1689 /*
> 1690 * There is no need to free ConnThreadArg here, since it is
> 1691 * allocated in the driver
> 1692 */
> (gdb) frame 6
> #6 0x00007f5859850561 in Ns_ThreadJoin (thread=<optimized out>,
> argPtr=<optimized out>) at pthread.c:459
> 459 NsThreadFatal("Ns_ThreadJoin", "pthread_join", err);
> (gdb) list
> 454
> 455 assert(thread != NULL);
> 456
> 457 err = pthread_join(thr, argPtr);
> 458 if (err != 0) {
> 459 NsThreadFatal("Ns_ThreadJoin", "pthread_join", err);
> 460 }
> 461 }
> 462
> 463 ^L
>
>
>
>
> Regards,
>
> --
> David Osborne
> Qcode Software Limited
> http://www.qcode.co.uk
>
>
>
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--
Univ.Prof. Dr. Gustaf Neumann
WU Vienna
Institute of Information Systems and New Media
Welthandelsplatz 1, A-1020 Vienna, Austria
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