Re:Re: Re: Re: Why gdb can't find symbol table when trying to debug ceph?

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Hi, thanks for your help.


I checked the version of both my ceph and ceph-debuginfo package are the same. Is there any other possible cause?
Thank you:-)







At 2016-11-20 15:40:29, "huang jun" <hjwsm1989@xxxxxxxxx> wrote:
>For first question, you can reinstall the ceph-debuginfo package
>released with your ceph package.
>for the assert problem, you can create an issue to track this
>http://tracker.ceph.com/projects/ceph/issues
>
>
>2016-11-20 15:29 GMT+08:00 xxhdx1985126 <xxhdx1985126@xxxxxxx>:
>>
>> No, how to verify it? And do you have any clue what made that assert fail? Thank you
>>
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>>
>> At 2016-11-20 15:28:26, "huang jun" <hjwsm1989@xxxxxxxxx> wrote:
>>>seems like the ceph and ceph-debuginfo package version not match, do
>>>you verified it?
>>>
>>>2016-11-20 15:20 GMT+08:00 xxhdx1985126 <xxhdx1985126@xxxxxxx>:
>>>> In my test today, the same problem came up even there is no such warning....
>>>>
>>>> By the way, the problem of ceph that I want to fix is as such: some of my osd can't finish the recovery+backfilling process due to the failure of the following assert:
>>>>
>>>> 2016-11-19 07:00:49.133814 7fc7a77ff700 -1 error_msg osd/ReplicatedPG.cc: In function 'void ReplicatedPG::wait_for_unreadable_object(const hobject_t&, OpRequestRef)' thread 7fc7a77ff700 time 2016-11-19 07:00:48.914231
>>>> osd/ReplicatedPG.cc: 387: FAILED assert(needs_recovery)
>>>>
>>>>  ceph version 0.94.5-12-g83f56a1 (83f56a1c84e3dbd95a4c394335a7b1dc926dd1c4)
>>>>  1: (ReplicatedPG::wait_for_unreadable_object(hobject_t const&, std::tr1::shared_ptr<OpRequest>)+0x3f5) [0x8b5a65]
>>>>  2: (ReplicatedPG::do_op(std::tr1::shared_ptr<OpRequest>&)+0x5e9) [0x8f0c79]
>>>>  3: (ReplicatedPG::do_request(std::tr1::shared_ptr<OpRequest>&, ThreadPool::TPHandle&)+0x4e3) [0x87fdc3]
>>>>  4: (OSD::dequeue_op(boost::intrusive_ptr<PG>, std::tr1::shared_ptr<OpRequest>, ThreadPool::TPHandle&)+0x178) [0x66b3f8]
>>>>  5: (OSD::ShardedOpWQ::_process(unsigned int, ceph::heartbeat_handle_d*)+0x59e) [0x66f8ee]
>>>>  6: (ShardedThreadPool::shardedthreadpool_worker(unsigned int)+0x795) [0xa76d85]
>>>>  7: (ShardedThreadPool::WorkThreadSharded::entry()+0x10) [0xa7a610]
>>>>  8: /lib64/libpthread.so.0() [0x393da07a51]
>>>>  9: (clone()+0x6d) [0x393d6e893d]
>>>>  NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.
>>>>
>>>> I'm using ceph-0.94.5 which should be the version "Hammer".
>>>> Do you have any clue about what made this assert fail?
>>>>
>>>>
>>>> At 2016-11-20 09:51:47, "huang jun" <hjwsm1989@xxxxxxxxx> wrote:
>>>>>that maybe the reason, do you have the same problem if there is no such warning?
>>>>>
>>>>>2016-11-19 19:00 GMT+08:00 xxhdx1985126 <xxhdx1985126@xxxxxxx>:
>>>>>>
>>>>>> Hi, everyone.
>>>>>>
>>>>>>
>>>>>> I'm trying to fix a problem in ceph using its core file and gdb.
>>>>>> gdb successfully loaded debug symbol from ceph-debuginfo:
>>>>>>
>>>>>>
>>>>>> Reading symbols from /usr/bin/ceph-osd...Reading symbols from /usr/lib/debug/usr/bin/ceph-osd.debug...done.
>>>>>>
>>>>>>
>>>>>> However, it still can't find the symbol table when I use "bt" to trace the stack:
>>>>>>
>>>>>>
>>>>>> #0  0x000000393da0f65b in ?? ()
>>>>>> No symbol table info available.
>>>>>> #1  0x0000000000a51636 in install_standard_sighandlers () at global/signal_handler.cc:121
>>>>>> No locals.
>>>>>> #2  0x00007fc7a77f9ed0 in ?? ()
>>>>>> No symbol table info available.
>>>>>> #3  0x00007fc7a77f9e10 in ?? ()
>>>>>> No symbol table info available.
>>>>>> #4  0x00007fc7a77f9b90 in ?? ()
>>>>>> No symbol table info available.
>>>>>> #5  0x00007fc66d3142e0 in ?? ()
>>>>>> No symbol table info available.
>>>>>> #6  0x00007fc7fac64100 in ?? ()
>>>>>> No symbol table info available.
>>>>>> #7  0x0000003900000000 in ?? ()
>>>>>> No symbol table info available.
>>>>>> #8  0x0000000000a51155 in SignalHandler::unregister_handler (this=0x1105440, signum=<value optimized out>, handler=<value optimized out>) at global/signal_handler.cc:317
>>>>>> No locals.
>>>>>> #9  0x000000393eabcc33 in ?? ()
>>>>>> No symbol table info available.
>>>>>> #10 0x000000393eabcd2e in ?? ()
>>>>>> No symbol table info available.
>>>>>>
>>>>>>
>>>>>> Why is this happening?
>>>>>>
>>>>>>
>>>>>> PS: when gdb started running, it prompted the following warning:
>>>>>>
>>>>>>
>>>>>> BFD: Warning: /home/xuxuehan/online_problems.2016-11-19.7-01/core-ceph-osd-6-32337-32337-19906-1479510049 is truncated: expected core file size >= 8372899840, found: 7439335424
>>>>>>
>>>>>>
>>>>>> Could this be the cause of gdb not finding the symbol table?
>>>>>
>>>>>
>>>>>
>>>>>--
>>>>>Thank you!
>>>>>HuangJun
>>>
>>>
>>>
>>>--
>>>Thank you!
>>>HuangJun
>>
>>
>>
>>
>
>
>
>-- 
>Thank you!
>HuangJun



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