[ClusterLabs] Corosync ifdown / ifup crash with Assertion `token_memb_entries >= 1' failed.

[Jan Friesse]

Alexander,

Alexander T napsal(a):
> Hello everyone!
> 
> I was wondering if the project is aware of the bug at
> https://bugzilla.redhat.com/show_bug.cgi?id=989934 and if it has been fixed
> in recent releases.

Yes, we are aware of this bug and no it's not fixed. Fixing this bug is
way harder then it looks like and workaround (just don't do ifdown) is
simple. It will be fixed in Corosync 3.0 because of knet migration and I
still hope I will be also able to fix 2.x and 1.x, but not in the near
future.

> 
> It leaves pacemaker in a half-crashed state and it was non-trivial to track
> down in my case. If anyone could explain how this error occurs it would be
> beneficial for me, since I need to explain to a customer the reason why
> ifdown/up isn't working (and is unsupported).

Technically it's mix of weird requirements (where most of them are
totally irrelevant today) and weird implementation.

> 
> The traceback in my case is:
> 
> #0  0x00007f9f65a31925 in raise (sig=6) at
> ../nptl/sysdeps/unix/sysv/linux/raise.c:64
> 64  return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
> (gdb) bt
> #0  0x00007f9f65a31925 in raise (sig=6) at
> ../nptl/sysdeps/unix/sysv/linux/raise.c:64
> #1  0x00007f9f65a33105 in abort () at abort.c:92
> #2  0x00007f9f65a2aa4e in __assert_fail_base (fmt=<value optimized out>,
> assertion=0x7f9f667f05b5 "token_memb_entries >= 1", file=0x7f9f667f0559
> "totemsrp.c",
>     line=<value optimized out>, function=<value optimized out>) at
> assert.c:96
> #3  0x00007f9f65a2ab10 in __assert_fail (assertion=0x7f9f667f05b5
> "token_memb_entries >= 1", file=0x7f9f667f0559 "totemsrp.c", line=1235,
>     function=0x7f9f667f09b0 "memb_consensus_agreed") at assert.c:105
> #4  0x00007f9f667de48c in memb_consensus_agreed (instance=0x7f9f66bbd010)
> at totemsrp.c:1235
> #5  0x00007f9f667e23df in memb_join_process (instance=0x7f9f66bbd010,
> memb_join=0x10fb294) at totemsrp.c:3991
> #6  0x00007f9f667e2789 in message_handler_memb_join
> (instance=0x7f9f66bbd010, msg=<value optimized out>, msg_len=<value
> optimized out>,
>     endian_conversion_needed=<value optimized out>) at totemsrp.c:4236
> #7  0x00007f9f667dc668 in rrp_deliver_fn (context=<value optimized out>,
> msg=0x10fb294, msg_len=333) at totemrrp.c:1747
> #8  0x00007f9f667d99da in net_deliver_fn (handle=<value optimized out>,
> fd=<value optimized out>, revents=<value optimized out>, data=0x10fabe0) at
> totemudpu.c:1153
> #9  0x00007f9f667d2352 in poll_run (handle=8184985674965843968) at
> coropoll.c:513
> #10 0x0000000000407966 in main (argc=<value optimized out>, argv=<value
> optimized out>, envp=<value optimized out>) at main.c:2043
> 
> Best regards
> 
> Alexander Torstling
> 
> 

Regards,
  Honza

> 
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