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  1. Core Server
  2. SERVER-19518

mongod crashes with WriteConflictException when writing oplog on secondaries

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    • Type: Icon: Bug Bug
    • Resolution: Duplicate
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4
    • Component/s: Replication, WiredTiger
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      Very difficult to reproduce, but it seems to be related to high write activity and chained replication.

      Show
      Very difficult to reproduce, but it seems to be related to high write activity and chained replication.

      Under heavy load, a secondary of a 3 member replicaset went down with the following final lines in the log:

      2015-07-21T08:40:44.541-0400 I NETWORK  [initandlisten] connection accepted from (secondary) #14060 (219 connections now open)
2015-07-21T08:40:44.567-0400 I ACCESS   [conn14060] Successfully authenticated as principal __system on local
2015-07-21T08:40:46.434-0400 I REPL     [rsSync] WriteConflictException while writing oplog, retrying.
2015-07-21T08:40:46.475-0400 F REPL     [rsSync] replication oplog stream went back in time. previous timestamp: 55ae3dd4:28 newest timestamp: 55ae3d60:c. Op being applied: { ts: Timestamp 1437482336000|12, h: 5080621651469059829, v: 2, op: "u", ns: "db.coll", o2: { _id: ObjectId('55ad20d2479b1e68cb2f3011') }, o: { $set: { xxx.16: { _id: ObjectId('55ad2818479b1e68cb2f36a7'), xxx: [ { C: "Cu", N: "F" } ] } } } }
2015-07-21T08:40:46.477-0400 I -        [rsSync] Fatal Assertion 18905
2015-07-21T08:40:46.477-0400 I -        [rsSync]

            Assignee:
            scotthernandez Scott Hernandez (Inactive)
            Reporter:
            wrichard William Richards
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              Created:
              Updated:
              Resolved: