Forum OpenACS Q&A: Re: OpenACS clustering setup and how it relates to xotcl-core.

Hi Gustaf,

We got a signal 11 core today on our live system. I was able to connect up to it with gdb and get a backtrace. Here is the backtrace.

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Reading symbols from /usr/local/ns/bin/nsd...
Using host libthread_db library "/lib/x86_64-linux-gnu/".
--Type RET for more, q to quit, c to continue without paging--
Core was generated by `/usr/local/ns/bin/nsd -u root -g web -i -t /web/etc/config.tcl'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  __GI_abort () at abort.c:107
107     abort.c: No such file or directory.
[Current thread is 1 (Thread 0x7fcc74ff9700 (LWP 37))]
(gdb) bt
#0  __GI_abort () at abort.c:107
#1  0x00007fccba4b3064 in skgdbgcra () from /opt/oracle/instantclient_21_1/
#2  0x00007fccba480693 in skgesigCrash () from /opt/oracle/instantclient_21_1/
#3  0x00007fccba4809de in skgesig_sigactionHandler () from /opt/oracle/instantclient_21_1/
#4  signal handler called
#5  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#6  0x00007fccc2292859 in __GI_abort () at abort.c:79
#7  0x00007fccc24cf27f in Panic (fmt=optimized out) at log.c:943
#8  0x00007fccc215bf8d in Tcl_PanicVA () from /usr/local/ns/lib/
#9  0x00007fccc215c0ff in Tcl_Panic () from /usr/local/ns/lib/
#10 0x00007fccc25143ca in Abort (signal=optimized out) at unix.c:1119
#11 signal handler called
#12 0x00007fccc24b825c in NsTclConnChanProc (UNUSED_sock=optimized out, arg=0x7fcbf581d460, why=1) at connchan.c:694
#13 0x00007fccc24e279d in SockCallbackThread (UNUSED_arg=optimized out) at sockcallback.c:531
#14 0x00007fccc2210fd4 in NsThreadMain (arg=optimized out) at thread.c:232
#15 0x00007fccc221169f in ThreadMain (arg=optimized out) at pthread.c:870
#16 0x00007fccc1b72609 in start_thread (arg=optimized out) at pthread_create.c:477
#17 0x00007fccc238f293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Any Ideas on what could be causing the signal 11 issue? If you want me to open a new discussion on it I can.. Thanks! Marty