Eugen,

At first - you should upgrade to 12.2.11 (or bring the mentioned patch in by other means) to fix rename procedure which will avoid new inconsistent objects appearance in DB. This should at least reduce the OSD crash frequency.

At second - theoretically previous crashes could result in persistent inconsistent objects in your DB. I haven't seen that in real life before but probably they exist. We need to check. If so OSD crashes might still occur.

So I'd like to have fsck report to verify that. No matter if you do fsck before or after the upgrade.

Once we have fsck report we can proceed with the repair. Which is a bit risky procedure so may be I should try to simulate  the inconsistency  in question and check if built-in repair handles that properly. Will see, lets get fsck report first.


W.r.t to running ceph-bluestore-tool - you might want to specify log file and increase log level to 20 using --log-file and --log-level options.


On 2/7/2019 4:45 PM, Eugen Block wrote:
Hi Igor,

thanks for the quick response!
Just to make sure I don't misunderstand, and because it's a production cluster: before anything else I should run fsck on that OSD? Depending on the result we'll decide how to continue, right? Is there anything else to be enabled for that command or can I simply run 'ceph-bluestore-tool fsck --path /var/lib/ceph/osd/ceph-<ID>'?

Any other obstacles I should be aware of when running fsck?

Thanks!
Eugen


Zitat von Igor Fedotov <ifedo...@suse.de>:

Hi Eugen,

looks like this isn't [1] but rather

https://tracker.ceph.com/issues/38049

and

https://tracker.ceph.com/issues/36541 (= https://tracker.ceph.com/issues/36638 for luminous)

Hence it's not fixed in 12.2.10, target release is 12.2.11


Also please note the patch allows to avoid new occurrences for the issue. But there some chances that inconsistencies caused by it earlier are still present in DB. And assertion might still happen (hopefully with less frequency).

So could you please run fsck for OSDs that were broken once and share the results?

Then we can decide if it makes sense to proceed with the repair.


Thanks,

Igor

On 2/7/2019 3:37 PM, Eugen Block wrote:
Hi list,

I found this thread [1] about crashing SSD OSDs, although that was about an upgrade to 12.2.7, we just hit (probably) the same issue after our update to 12.2.10 two days ago in a production cluster. Just half an hour ago I saw one OSD (SSD) crashing (for the first time):

2019-02-07 13:02:07.682178 mon.host1 mon.0 <IP>:6789/0 109754 : cluster [INF] osd.10 failed (root=default,host=host1) (connection refused reported by osd.20) 2019-02-07 13:02:08.623828 mon.host1 mon.0 <IP>:6789/0 109771 : cluster [WRN] Health check failed: 1 osds down (OSD_DOWN)

One minute later, the OSD was back online.
This is the stack trace reported in syslog:

---cut here---
2019-02-07T13:01:51.181027+01:00 host1 ceph-osd[1136505]: *** Caught signal (Aborted) ** 2019-02-07T13:01:51.181232+01:00 host1 ceph-osd[1136505]:  in thread 7f75ce646700 thread_name:bstore_kv_final 2019-02-07T13:01:51.185873+01:00 host1 ceph-osd[1136505]: ceph version 12.2.10-544-gb10c702661 (b10c702661a31c8563b3421d6d664de93a0cb0e2) luminous (stable) 2019-02-07T13:01:51.186077+01:00 host1 ceph-osd[1136505]:  1: (()+0xa587d9) [0x560b921cc7d9] 2019-02-07T13:01:51.186226+01:00 host1 ceph-osd[1136505]:  2: (()+0x10b10) [0x7f75d8386b10] 2019-02-07T13:01:51.186368+01:00 host1 ceph-osd[1136505]:  3: (gsignal()+0x37) [0x7f75d73508d7] 2019-02-07T13:01:51.186773+01:00 host1 ceph-osd[1136505]:  4: (abort()+0x13a) [0x7f75d7351caa] 2019-02-07T13:01:51.186906+01:00 host1 ceph-osd[1136505]:  5: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x280) [0x560b922096d0] 2019-02-07T13:01:51.187027+01:00 host1 ceph-osd[1136505]:  6: (interval_set<unsigned long, btree::btree_map<unsigned long, unsigned long, std::less<unsigned long>, mempool::pool_allocator<(mempool::pool_index_t)1, std::pair<unsigned long const, unsigned long> >, 256> >::insert(unsigned long, unsigned long, unsigned long*, unsigned long*)+0xef2) [0x560b921bd432] 2019-02-07T13:01:51.187167+01:00 host1 ceph-osd[1136505]:  7: (StupidAllocator::_insert_free(unsigned long, unsigned long)+0x126) [0x560b921b4a06] 2019-02-07T13:01:51.187294+01:00 host1 ceph-osd[1136505]:  8: (StupidAllocator::release(unsigned long, unsigned long)+0x7d) [0x560b921b4f4d] 2019-02-07T13:01:51.187418+01:00 host1 ceph-osd[1136505]:  9: (BlueStore::_txc_release_alloc(BlueStore::TransContext*)+0x72) [0x560b9207fa22] 2019-02-07T13:01:51.187539+01:00 host1 ceph-osd[1136505]:  10: (BlueStore::_txc_finish(BlueStore::TransContext*)+0x5d7) [0x560b92092d77] 2019-02-07T13:01:51.187661+01:00 host1 ceph-osd[1136505]:  11: (BlueStore::_txc_state_proc(BlueStore::TransContext*)+0x1f6) [0x560b920a3fa6] 2019-02-07T13:01:51.187781+01:00 host1 ceph-osd[1136505]:  12: (BlueStore::_kv_finalize_thread()+0x620) [0x560b920a58e0] 2019-02-07T13:01:51.187898+01:00 host1 ceph-osd[1136505]:  13: (BlueStore::KVFinalizeThread::entry()+0xd) [0x560b920fb57d] 2019-02-07T13:01:51.188017+01:00 host1 ceph-osd[1136505]:  14: (()+0x8744) [0x7f75d837e744] 2019-02-07T13:01:51.188138+01:00 host1 ceph-osd[1136505]:  15: (clone()+0x6d) [0x7f75d7405aad] 2019-02-07T13:01:51.188271+01:00 host1 ceph-osd[1136505]: 2019-02-07 13:01:51.185833 7f75ce646700 -1 *** Caught signal (Aborted) **
---cut here---

Is there anything we can do about this? The issue in [1] doesn't seem to be resolved, yet. Debug logging is not enabled, so I don't have more detailed information except the full stack trace from the OSD log. Any help is appreciated!

Regards,
Eugen

[1] http://lists.ceph.com/pipermail/ceph-users-ceph.com/2018-September/029616.html

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