crash in multipathd

crash in multipathd

[Arthur Bergman]

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Trying to get multipath-tools working on a debian system, multipath the 
tool works but multipathd segfaults.

getrlimit(RLIMIT_STACK, {rlim_cur=RLIM_INFINITY, 
rlim_max=RLIM_INFINITY}) = 0
setrlimit(RLIMIT_STACK, {rlim_cur=2044*1024, rlim_max=RLIM_INFINITY}) = 
0
getpid()                                = 3700
rt_sigaction(SIGRTMIN, {0x40024030, [], 0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x40024080, [], 0}, NULL, 8) = 0
rt_sigaction(SIGRT_2, {0x40024150, [], 0}, NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [RTMIN], NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RT_1], NULL, 8) = 0
_sysctl({{CTL_KERN, KERN_VERSION}, 2, 0xbffffa74, 31, (nil), 0}) = 0
brk(0)                                  = 0x8052000
brk(0x8073000)                          = 0x8073000
brk(0)                                  = 0x8073000
clone(Process 3701 attached
child_stack=0x8056038, flags=CLONE_NEWNS) = 3701
[pid  3700] exit_group(0)               = ?
[pid  3701] --- SIGSEGV (Segmentation fault) @ 0 (0) ---
Process 3701 detached

please advice, should I try to compile my own version?

Cheers
Arthur

-----
CTO @ Fotango Ltd
+447834716919
http://www.fotango.com/

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Re: crash in multipathd

[Christophe Varoqui]

> 
> please advice, should I try to compile my own version?
> 
You should try that , yes.
If it fixes the problem, you should report to Debian, as they added a
patch to inhibit the pidfile logic in the daemon since 0.4.2

regards,
cvaroqui

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Re: crash in multipathd

[Christophe Varoqui]

Works here on x86 and amd64.
Can you give a little more background ?

regards,
cvaroqui

Arthur Bergman wrote:

> I tried compiling my own version and the same thing happens,
>
> so using multipath -S works to set them up, but multipathd crashes...
>
> also, gdb crashes when I try to debug it!
>
> cheers
> Arthur
>
> -----
> CTO @ Fotango Ltd
> +447834716919
> http://www.fotango.com/
>
> On 30 Jan 2005, at 20:30, Arthur Bergman wrote:
>
>> Trying to get multipath-tools working on a debian system, multipath 
>> the tool works but multipathd segfaults.
>>
>> getrlimit(RLIMIT_STACK, {rlim_cur=RLIM_INFINITY, 
>> rlim_max=RLIM_INFINITY}) = 0
>> setrlimit(RLIMIT_STACK, {rlim_cur=2044*1024, rlim_max=RLIM_INFINITY}) 
>> = 0
>> getpid()                                = 3700
>> rt_sigaction(SIGRTMIN, {0x40024030, [], 0}, NULL, 8) = 0
>> rt_sigaction(SIGRT_1, {0x40024080, [], 0}, NULL, 8) = 0
>> rt_sigaction(SIGRT_2, {0x40024150, [], 0}, NULL, 8) = 0
>> rt_sigprocmask(SIG_BLOCK, [RTMIN], NULL, 8) = 0
>> rt_sigprocmask(SIG_UNBLOCK, [RT_1], NULL, 8) = 0
>> _sysctl({{CTL_KERN, KERN_VERSION}, 2, 0xbffffa74, 31, (nil), 0}) = 0
>> brk(0)                                  = 0x8052000
>> brk(0x8073000)                          = 0x8073000
>> brk(0)                                  = 0x8073000
>> clone(Process 3701 attached
>> child_stack=0x8056038, flags=CLONE_NEWNS) = 3701
>> [pid  3700] exit_group(0)               = ?
>> [pid  3701] --- SIGSEGV (Segmentation fault) @ 0 (0) ---
>> Process 3701 detached
>>
>> please advice, should I try to compile my own version?
>>
>> Cheers
>> Arthur
>>
>> -----
>> CTO @ Fotango Ltd
>> +447834716919
>> http://www.fotango.com/
>> -- 
>> dm-devel mailing list
>> dm-devel@redhat.com
>> https://www.redhat.com/mailman/listinfo/dm-devel
>


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Re: crash in multipathd

[Christophe Varoqui]

good

I'm not aware of any exotic use of pthreads in the daemon. Do you mean 
we should get rid of pthreads entirely or we should spot the shaky 
pthread use ?

regards,
cvaroqui

Arthur Bergman wrote:

> I discovered what causes it.
>
> I am running with tls disabled, mv /lib/tls /lib/tls.disabled   this 
> is becuase /lib/tls doesn't work very well for xen
>
> Any way we could get multipathd to work without /lib/tls
>


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