Yes, I understand that. I was introduced to Ceph only 1 month ago, but I have the basic idea of Ceph communication pattern now. I have not make any changes to OSD yet. So I was wondering what is purpose of this "assert(oid.pool == static_cast<int64_t>(info.pgid.pool()))", and to change the code in OSD, what are the main aspects I should pay attention to? Since this is only a research project, the implementation does not have to be very sophisticated. I know my question is kinda too broad, any hints or suggestions will be highly appreciated. Thanks, Sugang On Thu, Jul 21, 2016 at 11:22 AM, Samuel Just <sjust@xxxxxxxxxx> wrote: > Oh, that's a much more complicated change. You are going to need to > make extensive changes to the OSD to make that work. > -Sam > > On Thu, Jul 21, 2016 at 8:21 AM, Sugang Li <sugangli@xxxxxxxxxxxxxxxxxx> wrote: >> Hi Sam, >> >> Thanks for the quick reply. The main modification I made is to call >> calc_target within librados::IoCtxImpl::aio_operate before op_submit, >> so that I can get all replicated OSDs' id, and send a write op to each >> of them. I can also attach the modified code if necessary. >> >> I just reproduced this error with the conf you provided, please see below: >> osd/ReplicatedPG.cc: In function 'int >> ReplicatedPG::find_object_context(const hobject_t&, ObjectContextRef*, >> bool, bool, hobject_t*)' thread 7fd6aba59700 time 2016-07-21 >> 15:09:26.431436 >> osd/ReplicatedPG.cc: 9042: FAILED assert(oid.pool == >> static_cast<int64_t>(info.pgid.pool())) >> ceph version 10.2.0-2562-g0793a28 (0793a2844baa38f6bcc5c1724a1ceb9f8f1bbd9c) >> 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char >> const*)+0x8b) [0x7fd6c5733e8b] >> 2: (ReplicatedPG::find_object_context(hobject_t const&, >> std::shared_ptr<ObjectContext>*, bool, bool, hobject_t*)+0x1e54) >> [0x7fd6c51ef7c4] >> 3: (ReplicatedPG::do_op(std::shared_ptr<OpRequest>&)+0x186e) [0x7fd6c521fe9e] >> 4: (ReplicatedPG::do_request(std::shared_ptr<OpRequest>&, >> ThreadPool::TPHandle&)+0x73c) [0x7fd6c51dca3c] >> 5: (OSD::dequeue_op(boost::intrusive_ptr<PG>, >> std::shared_ptr<OpRequest>, ThreadPool::TPHandle&)+0x3f5) >> [0x7fd6c5094d65] >> 6: (PGQueueable::RunVis::operator()(std::shared_ptr<OpRequest> >> const&)+0x5d) [0x7fd6c5094f8d] >> 7: (OSD::ShardedOpWQ::_process(unsigned int, >> ceph::heartbeat_handle_d*)+0x86c) [0x7fd6c50b603c] >> 8: (ShardedThreadPool::shardedthreadpool_worker(unsigned int)+0x947) >> [0x7fd6c5724117] >> 9: (ShardedThreadPool::WorkThreadSharded::entry()+0x10) [0x7fd6c5726270] >> 10: (()+0x8184) [0x7fd6c3b98184] >> 11: (clone()+0x6d) [0x7fd6c1aa937d] >> NOTE: a copy of the executable, or `objdump -rdS <executable>` is >> needed to interpret this. >> 2016-07-21 15:09:26.454854 7fd6aba59700 -1 osd/ReplicatedPG.cc: In >> function 'int ReplicatedPG::find_object_context(const hobject_t&, >> ObjectContextRef*, bool, bool, hobject_t*)' thread 7fd6aba59700 time >> 2016-07-21 15:09:26.431436 >> >> >> This error occurs three times since I wrote to three OSDs. >> >> Thanks, >> >> Sugang >> >> On Thu, Jul 21, 2016 at 10:54 AM, Samuel Just <sjust@xxxxxxxxxx> wrote: >>> Hmm. Can you provide more information about the poison op? If you >>> can reproduce with >>> debug osd = 20 >>> debug filestore = 20 >>> debug ms = 1 >>> it should be easier to work out what is going on. >>> -Sam >>> >>> On Thu, Jul 21, 2016 at 7:13 AM, Sugang Li <sugangli@xxxxxxxxxxxxxxxxxx> wrote: >>>> Hi all, >>>> >>>> I am working on a research project which requires multiple write >>>> operations for the same object at the same time from the client. At >>>> the OSD side, I got this error: >>>> osd/ReplicatedPG.cc: In function 'int >>>> ReplicatedPG::find_object_context(const hobject_t&, ObjectContextRef*, >>>> bool, bool, hobject_t*)' thread 7f0586193700 time 2016-07-21 >>>> 14:02:04.218448 >>>> osd/ReplicatedPG.cc: 9041: FAILED assert(oid.pool == >>>> static_cast<int64_t>(info.pgid.pool())) >>>> ceph version 10.2.0-2562-g0793a28 (0793a2844baa38f6bcc5c1724a1ceb9f8f1bbd9c) >>>> 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char >>>> const*)+0x8b) [0x7f059fe6dd7b] >>>> 2: (ReplicatedPG::find_object_context(hobject_t const&, >>>> std::shared_ptr<ObjectContext>*, bool, bool, hobject_t*)+0x1dbb) >>>> [0x7f059f9296fb] >>>> 3: (ReplicatedPG::do_op(std::shared_ptr<OpRequest>&)+0x186e) [0x7f059f959d7e] >>>> 4: (ReplicatedPG::do_request(std::shared_ptr<OpRequest>&, >>>> ThreadPool::TPHandle&)+0x73c) [0x7f059f916a0c] >>>> 5: (OSD::dequeue_op(boost::intrusive_ptr<PG>, >>>> std::shared_ptr<OpRequest>, ThreadPool::TPHandle&)+0x3f5) >>>> [0x7f059f7ced65] >>>> 6: (PGQueueable::RunVis::operator()(std::shared_ptr<OpRequest> >>>> const&)+0x5d) [0x7f059f7cef8d] >>>> 7: (OSD::ShardedOpWQ::_process(unsigned int, >>>> ceph::heartbeat_handle_d*)+0x86c) [0x7f059f7f003c] >>>> 8: (ShardedThreadPool::shardedthreadpool_worker(unsigned int)+0x947) >>>> [0x7f059fe5e007] >>>> 9: (ShardedThreadPool::WorkThreadSharded::entry()+0x10) [0x7f059fe60160] >>>> 10: (()+0x8184) [0x7f059e2d2184] >>>> 11: (clone()+0x6d) [0x7f059c1e337d] >>>> >>>> And at the client side, I got segmentation fault. >>>> >>>> I am wondering what will be the possible reason that cause the assert fail? >>>> >>>> Thanks, >>>> >>>> Sugang >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in >>>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
