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Cisco Bug: CSCvv17811 - JIRA Bug: MAGLEV-12368 -- JIRA Bug: MAGLEV-12368 -- MongoDB is in a CrashLoopBackOff condition

Last Modified

Aug 17, 2020

Products (1)

  • Cisco DNA Center

Known Affected Releases

DNAC2.1.1.3

Description (partial)

Symptom:
Cisco DNA Center's MongoDB instance may degrade into a CrashLoopBackOff condition during an upgrade to 2.1.1.3, with the logs showing errors like the following.

2020-07-22T18:52:30.809+0000 I ASIO     [NetworkInterfaceASIO-RS-0] Successfully connected to mongodb-2.mongodb.maglev-system.svc.cluster.local:27017, took 2ms (2 connections now open to mongodb-2.mongodb.maglev-system.svc.cluster.local:27017)
2020-07-22T18:52:30.809+0000 I REPL     [SyncSourceFeedback] SyncSourceFeedback error sending update to mongodb-2.mongodb.maglev-system.svc.cluster.local:27017: InvalidReplicaSetConfig: Received replSetUpdatePosition for node with memberId 19 whose config version of 7544138 doesn't match our config version of 7530845
2020-07-22T18:52:30.940+0000 F REPL     [replication-1] Hashes do not match but OpTimes do. Our last op time fetched: { ts: Timestamp(1594334622, 1), t: 18 }. source's GTE: { ts: Timestamp(1594334622, 1), t: 18 } hashes: (-6005301580662067085/-8191132323753059052). Source's GTE doc: { ts: Timestamp(1594334622, 1), t: 18, h: -8191132323753059052, v: 2, op: "n", ns: "", wall: new Date(1594334622598), o: { msg: "periodic noop" } }
2020-07-22T18:52:30.940+0000 F -        [replication-1] Fatal Assertion 40634 at src/mongo/db/repl/oplog_fetcher.cpp 226
2020-07-22T18:52:30.940+0000 F -        [replication-1]

***aborting after fassert() failure

Conditions:
This was observed while upgrading Cisco DNA Center to 2.1.1.3.
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