Re: lease_timeout

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On Mon, Jan 29, 2018 at 6:58 PM, Gregory Farnum <gfarnum@xxxxxxxxxx> wrote:
> The lease timeout means this (peon) monitor hasn't heard from the leader
> monitor in too long; its read lease on the system state has expired. So it
> calls a new election since that means the leader is down or misbehaving. Do
> the other monitors have a similar problem at this stage?
>
> The manager freezing until you restart it is a separate bug, but I'm not
> sure what the dashboard/mgr people will want to see there. John?

There is a bug where the mgr will stop getting updates from the mon in
some situations (http://tracker.ceph.com/issues/22142), which is fixed
in master but not backported to luminous yet.

However, I don't know what "gets stuck" means in this context.  Karun,
can you be more specific?  Is it rendering but old data?  Is the page
not loading at all?

John

> -Greg
>
> On Sun, Jan 28, 2018 at 9:11 AM Karun Josy <karunjosy1@xxxxxxxxx> wrote:
>>
>> Still the issue is continuing. Any one else has noticed it ?
>>
>>
>> When this happens, the Ceph Dashboard GUI gets stuck and we have to
>> restart the manager daemon to make it work again
>>
>> Karun Josy
>>
>> On Wed, Jan 17, 2018 at 6:16 AM, Karun Josy <karunjosy1@xxxxxxxxx> wrote:
>>>
>>> Hello,
>>>
>>> In one of our cluster set up, there is frequent monitor elections
>>> happening.
>>> In the logs of one of the monitor, there is "lease_timeout" message
>>> before that happens. Can anyone help me to figure it out ?
>>> (When this happens, the Ceph Dashboard GUI gets stuck and we have to
>>> restart the manager daemon to make it work again)
>>>
>>> Ceph version : Luminous 12.2.2
>>>
>>> Log :
>>> =========================
>>>
>>> 2018-01-16 16:33:08.001937 7f0cfbaad700  4 rocksdb:
>>> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.2/rpm/el7/BUILD/ceph-12.2.2/src/rocksdb/db/compaction_job.cc:1173]
>>> [default] [JOB 885] Compacted 1@0 + 1@1 files to L1 => 20046585 bytes
>>> 2018-01-16 16:33:08.015891 7f0cfbaad700  4 rocksdb: (Original Log Time
>>> 2018/01/16-16:33:08.015826)
>>> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.2/rpm/el7/BUILD/ceph-12.2.2/src/rocksdb/db/compaction_job.cc:621]
>>> [default] compacted to: base level 1 max bytes base 268435456 files[0 1 0 0
>>> 0 0 0] max score 0.07, MB/sec: 32.7 rd, 30.9 wr, level 1, files in(1, 1)
>>> out(1) MB in(1.3, 18.9) out(19.1), read-write-amplify(31.0)
>>> write-amplify(15.1) OK, records in: 4305, records dropped: 515
>>>
>>> 2018-01-16 16:33:08.015897 7f0cfbaad700  4 rocksdb: (Original Log Time
>>> 2018/01/16-16:33:08.015840) EVENT_LOG_v1 {"time_micros": 1516149188015833,
>>> "job": 885, "event": "compaction_finished", "compaction_time_micros":
>>> 647876, "output_level": 1, "num_output_files": 1, "total_output_size":
>>> 20046585, "num_input_records": 4305, "num_output_records": 3790,
>>> "num_subcompactions": 1, "num_single_delete_mismatches": 0,
>>> "num_single_delete_fallthrough": 0, "lsm_state": [0, 1, 0, 0, 0, 0, 0]}
>>> 2018-01-16 16:33:08.016131 7f0cfbaad700  4 rocksdb: EVENT_LOG_v1
>>> {"time_micros": 1516149188016128, "job": 885, "event":
>>> "table_file_deletion", "file_number": 2419}
>>> 2018-01-16 16:33:08.018147 7f0cfbaad700  4 rocksdb: EVENT_LOG_v1
>>> {"time_micros": 1516149188018146, "job": 885, "event":
>>> "table_file_deletion", "file_number": 2417}
>>> 2018-01-16 16:33:11.051010 7f0d042be700  0
>>> mon.ceph-mon3@2(peon).data_health(436) update_stats avail 84% total 20918
>>> MB, used 2179 MB, avail 17653 MB
>>> 2018-01-16 16:33:17.269954 7f0d042be700  1
>>> mon.ceph-mon3@2(peon).paxos(paxos active c 84337..84838) lease_timeout --
>>> calling new election
>>> 2018-01-16 16:33:17.291096 7f0d01ab9700  0 log_channel(cluster) log [INF]
>>> : mon.ceph-sgp-mon3 calling new monitor election
>>> 2018-01-16 16:33:17.291182 7f0d01ab9700  1
>>> mon.ceph-mon3@2(electing).elector(436) init, last seen epoch 436
>>> 2018-01-16 16:33:20.834853 7f0d01ab9700  1 mon.ceph-mon3@2(peon).log
>>> v23189 check_sub sending message to client.65755 10.255.0.95:0/2603001850
>>> with 8 entries (version 23189)
>>>
>>>
>>>
>>> Karun
>>
>>
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