Hi there,
regarding my ML post from yesterday (Upgrade from 12.2.1 to 12.2.2 broke my
CephFs) I was able to get a little further with the suggested
"cephfs-table-tool take_inos <max ino>". This made the whole issue with
loads of "falsely free-marked inodes" go away.
I then restarted MDS, kept all clients down so no client has mounted FS.
Then I started an online MDS scrub
ceph daemon mds.a scrub_path / recursive repair
This again ran for about 3 hours, then MDS again marked FS damaged and
changes its own state to standby (at least that is what I interpret from
what I see. This happened exactly at the moment when the scrub hit a missing
object. See end of logfile (default log level):
2017-12-11 22:29:05.725484 7fc2342bc700 0 log_channel(cluster) log [WRN] :
bad backtrace on inode
0x1000d3aede3(/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing/test-unwanted-simple.sbstore),
rewriting it
2017-12-11 22:29:05.725507 7fc2342bc700 0 log_channel(cluster) log [WRN] :
Scrub error on inode 0x1000d3aede3
(/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing/test-unwanted-simple.sbstore)
see mds.b log and `damage ls` output for details
2017-12-11 22:29:05.725569 7fc2342bc700 -1 mds.0.scrubstack
_validate_inode_done scrub error on inode [inode 0x1000d3aede3 [2,head]
/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing/test-unwanted-simple.sbstore
auth v382 dirtyparent s=232 n(v0 b232 1=1+0) (iversion lock) | dirtyparent=1
scrubqueue=0 0x55ef37c83200]:
{"performed_validation":true,"passed_validation":false,"backtrace":{"checked":true,"passed":false,"read_ret_val":-61,"ondisk_value":"(-1)0x0:[]//","memoryvalue":"(0)0x1000d3aede3:[<0x1000d3aeda7/test-unwanted-simple.sbstore
v382>,<0x10002de79e8/safebrowsing v7142119>,<0x10002de79df/dsjf5siv.default
v4089757>,<0x10002de79de/firefox v3998050>,<0x10002de79dd/mozilla
v4933047>,<0x100018bd837/.cache v115551644>,<0x10000000000/some_username
v444724510>,<0x1/home v228039388>]//","error_str":"failed to read off disk;
see
retval"},"raw_stats":{"checked":false,"passed":false,"read_ret_val":0,"ondisk_value.dirstat":"f()","ondisk_value.rstat":"n()","memory_value.dirrstat":"f()","memory_value.rstat":"n()","error_str":""},"return_code":-61}
2017-12-11 22:29:05.729992 7fc2342bc700 0 log_channel(cluster) log [WRN] :
bad backtrace on inode
0x1000d3aedf1(/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing/testexcept-flashsubdoc-simple.sbstore),
rewriting it
2017-12-11 22:29:05.730022 7fc2342bc700 0 log_channel(cluster) log [WRN] :
Scrub error on inode 0x1000d3aedf1
(/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing/testexcept-flashsubdoc-simple.sbstore)
see mds.b log and `damage ls` output for details
2017-12-11 22:29:05.730077 7fc2342bc700 -1 mds.0.scrubstack
_validate_inode_done scrub error on inode [inode 0x1000d3aedf1 [2,head]
/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing/testexcept-flashsubdoc-simple.sbstore
auth v384 dirtyparent s=232 n(v0 b232 1=1+0) (iversion lock) | dirtyparent=1
scrubqueue=0 0x55ef3aa38a00]:
{"performed_validation":true,"passed_validation":false,"backtrace":{"checked":true,"passed":false,"read_ret_val":-61,"ondisk_value":"(-1)0x0:[]//","memoryvalue":"(0)0x1000d3aedf1:[<0x1000d3aeda7/testexcept-flashsubdoc-simple.sbstore
v384>,<0x10002de79e8/safebrowsing v7142119>,<0x10002de79df/dsjf5siv.default
v4089757>,<0x10002de79de/firefox v3998050>,<0x10002de79dd/mozilla
v4933047>,<0x100018bd837/.cache v115551644>,<0x10000000000/some_username
v444724510>,<0x1/home v228039388>]//","error_str":"failed to read off disk;
see
retval"},"raw_stats":{"checked":false,"passed":false,"read_ret_val":0,"ondisk_value.dirstat":"f()","ondisk_value.rstat":"n()","memory_value.dirrstat":"f()","memory_value.rstat":"n()","error_str":""},"return_code":-61}
2017-12-11 22:29:05.733389 7fc2342bc700 0 log_channel(cluster) log [WRN] :
bad backtrace on inode
0x1000d3aedb6(/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing/test-malware-simple.cache),
rewriting it
2017-12-11 22:29:05.733420 7fc2342bc700 0 log_channel(cluster) log [WRN] :
Scrub error on inode 0x1000d3aedb6
(/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing/test-malware-simple.cache)
see mds.b log and `damage ls` output for details
2017-12-11 22:29:05.733475 7fc2342bc700 -1 mds.0.scrubstack
_validate_inode_done scrub error on inode [inode 0x1000d3aedb6 [2,head]
/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing/test-malware-simple.cache
auth v366 dirtyparent s=44 n(v0 b44 1=1+0) (iversion lock) | dirtyparent=1
scrubqueue=0 0x55ef37c78a00]:
{"performed_validation":true,"passed_validation":false,"backtrace":{"checked":true,"passed":false,"read_ret_val":-61,"ondisk_value":"(-1)0x0:[]//","memoryvalue":"(0)0x1000d3aedb6:[<0x1000d3aeda7/test-malware-simple.cache
v366>,<0x10002de79e8/safebrowsing v7142119>,<0x10002de79df/dsjf5siv.default
v4089757>,<0x10002de79de/firefox v3998050>,<0x10002de79dd/mozilla
v4933047>,<0x100018bd837/.cache v115551644>,<0x10000000000/some_username
v444724510>,<0x1/home v228039388>]//","error_str":"failed to read off disk;
see
retval"},"raw_stats":{"checked":false,"passed":false,"read_ret_val":0,"ondisk_value.dirstat":"f()","ondisk_value.rstat":"n()","memory_value.dirrstat":"f()","memory_value.rstat":"n()","error_str":""},"return_code":-61}
2017-12-11 22:29:05.772351 7fc2342bc700 0 mds.0.cache.dir(0x1000d3ae112)
_fetched missing object for [dir 0x1000d3ae112
/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing-to_delete/
[2,head] auth v=0 cv=0/0 ap=1+0+0 state=1073741952 f() n() hs=0+0,ss=0+0 |
waiter=1 authpin=1 0x55eedee27a80]
2017-12-11 22:29:05.772385 7fc2342bc700 -1 log_channel(cluster) log [ERR] :
dir 0x1000d3ae112 object missing on disk; some files may be lost
(/home/some_username/.cache/mozilla/firefox/dsjf5siv.default/safebrowsing-to_delete)
2017-12-11 22:29:05.778009 7fc2342bc700 1 mds.b respawn
2017-12-11 22:29:05.778028 7fc2342bc700 1 mds.b e: '/usr/bin/ceph-mds'
2017-12-11 22:29:05.778031 7fc2342bc700 1 mds.b 0: '/usr/bin/ceph-mds'
2017-12-11 22:29:05.778036 7fc2342bc700 1 mds.b 1: '-i'
2017-12-11 22:29:05.778038 7fc2342bc700 1 mds.b 2: 'b'
2017-12-11 22:29:05.778040 7fc2342bc700 1 mds.b 3: '--pid-file'
2017-12-11 22:29:05.778042 7fc2342bc700 1 mds.b 4:
'/var/run/ceph/mds.b.pid'
2017-12-11 22:29:05.778044 7fc2342bc700 1 mds.b 5: '-c'
2017-12-11 22:29:05.778046 7fc2342bc700 1 mds.b 6: '/etc/ceph/ceph.conf'
2017-12-11 22:29:05.778048 7fc2342bc700 1 mds.b 7: '--cluster'
2017-12-11 22:29:05.778050 7fc2342bc700 1 mds.b 8: 'ceph'
2017-12-11 22:29:05.778051 7fc2342bc700 1 mds.b 9: '--setuser'
2017-12-11 22:29:05.778053 7fc2342bc700 1 mds.b 10: 'ceph'
2017-12-11 22:29:05.778055 7fc2342bc700 1 mds.b 11: '--setgroup'
2017-12-11 22:29:05.778057 7fc2342bc700 1 mds.b 12: 'ceph'
2017-12-11 22:29:05.778104 7fc2342bc700 1 mds.b respawning with exe
/usr/bin/ceph-mds
2017-12-11 22:29:05.778107 7fc2342bc700 1 mds.b exe_path /proc/self/exe
2017-12-11 22:29:06.186020 7f9ad28f41c0 0 ceph version 12.2.2
(cf0baeeeeba3b47f9427c6c97e2144b094b7e5ba) luminous (stable), process
(unknown), pid 3214
2017-12-11 22:29:10.604701 7f9acbb38700 1 mds.b handle_mds_map standby
As long as MDS was still active, "damage ls" again gave me exactly 10001
damages of damage_type "backtrace". Log implies that those backtraces cannot
be fixed automatically. I could live with losing those 10k files, but I do
not get why MDS switches to "standby" and marks FS damaged rendering it
offline.
ceph -s then reports something like: mds: cephfs-0/1/1 1:damaged 1:standby
(not pasted but manually typed from my memory)
Btw. in the log the MDS encountered two more "object missing on disk; some
files may be lost" much earlier during that scrub (so three in total), but
the first two did not make the MDS going to standby.
I marked FS repaired, restarted MDS with mdf debug level 20 and reran a
scrub on that particular path but this time MDS wouldn't mark whole FS
damaged and stayed active. Will it only do so when finding three of those
damages in a row?
Is this a bug or is there something I would have to do to my cluster to get
it back to stable working condition? Again, all this began with upgrading
from 12.2.1 to 12.2.2.
Furthermore, is there a way to get rid of those "broken" files (either bad
backtrace or even more important those with missing objects) as I could live
with losing certain files if it helps getting CephFS working stable again.
