On Fri, 9 Jul 2010, Henry C Chang wrote: > Hi, > > I got the following error while stopping an mds. It's weird.. I remember fixing this bug about a week ago, but it didn't make it into ceph.git and I can't find my work. Reimplementing the changes now. (Basically, the mds has to close any client sessions before trying to flush out the log.) sage > > Steps: > 1. Create the ceph cluster (with 2 mds; both active) > 2. Mount the ceph cluster on /mnt/ceph and "tar zxvf > /path/to/ceph-0.19.1.tar.gz -C /mnt/ceph" > 3. Check MDS logs and make sure that mds1 is auth for /mnt/ceph/ceph-0.19.1 > 4. ceph mds set_max_mds 1 > 5. ceph mds stop 1 > > mds1 assert failed while stopping. see below: > > ========================================== > mds/journal.cc: In function 'C_Gather* LogSegment::try_to_expire(MDS*)': > mds/journal.cc:160: FAILED assert(ls != this) > 1: (LogSegment::try_to_expire(MDS*)+0x11c1) [0x90a1df] > 2: (MDLog::try_expire(LogSegment*)+0x2d) [0x902c25] > 3: (MDLog::trim(int)+0x55b) [0x902b0b] > 4: (MDCache::shutdown_pass()+0xeb) [0x7d6aab] > 5: (MDS::_dispatch(Message*)+0x2dc1) [0x71597f] > 6: (MDS::ms_dispatch(Message*)+0x38) [0x712a44] > 7: (Messenger::ms_deliver_dispatch(Message*)+0x63) [0x6fe07b] > 8: (SimpleMessenger::dispatch_entry()+0x5fd) [0x6ef7e7] > 9: (SimpleMessenger::DispatchThread::entry()+0x2c) [0x6e44b8] > 10: (Thread::_entry_func(void*)+0x23) [0x6fd075] > 11: /lib64/libpthread.so.0() [0x3552e06a3a] > 12: (clone()+0x6d) [0x35526ddf3d] > NOTE: a copy of the executable, or `objdump -rdS <executable>` is > needed to interpret this. > ============================================ > > Henry > -- > 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
