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  1. Core Server
  2. SERVER-36870

Replication fails if server date exceeds January 19th, 2038

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Minor - P4
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: Backlog
    • Component/s: Replication
    • Labels:
      None
    • Operating System:
      ALL
    • Steps To Reproduce:
      Hide
      • setup an Ubuntu 18.04 server VM
      • setup a 3 node replica set using mlaunch (mlaunch --replicaset --nodes 3)
      • access the primary via the mongo shell and enable verbose logging
        • db.setLogLevel(1)
      • start inserting random documents into a collection:
        • for (var x = 1; x < 100000; x++) { db.test.insert( { a: x }

          ) }

      • in another terminal set the system date beyond January 19th, 2038:
        • sudo date -s "15 JAN 2039 18:00:00"
      • crash details should be present in one of the replica set member mongod.log files
      Show
      setup an Ubuntu 18.04 server VM setup a 3 node replica set using mlaunch (mlaunch --replicaset --nodes 3) access the primary via the mongo shell and enable verbose logging db.setLogLevel(1) start inserting random documents into a collection: for (var x = 1; x < 100000; x++) { db.test.insert( { a: x } ) } in another terminal set the system date beyond January 19th, 2038: sudo date -s "15 JAN 2039 18:00:00" crash details should be present in one of the replica set member mongod.log files
    • Case:

      Description

      If a replica set is running on a node who's date exceeds the bounds set by the 2038 bug (see https://en.wikipedia.org/wiki/Year_2038_problem), replication will fail due to a timestamp overflow:

      2039-01-15T18:00:00.037-0500 I REPL [replication-1] Restarting oplog query due to error: ExceededTimeLimit: Operation timed out, request was RemoteCommand 13017 – target:localhost:27018 db:local expDate:2018-08-24T17:06:58.217-0400 cmd:{ getMore: 16995111421, collection: "oplog.rs", maxTimeMS: 5000, term: 4, lastKnownCommittedOpTime:

      Unknown macro: { ts}

      }. Last fetched optime (with hash): { ts: Timestamp 1535144753000|331, t: 4 [-5142302661271950628]. Restarts remaining: 3
      2039-01-15T18:00:00.049-0500 I REPL [ReplicationExecutor] transition to PRIMARY
      2039-01-15T18:00:00.049-0500 I REPL [ReplicationExecutor] Entering primary catch-up mode.
      2039-01-15T18:00:00.050-0500 I REPL [ReplicationExecutor] Member localhost:27017 is now in state SECONDARY
      2039-01-15T18:00:00.050-0500 I REPL [ReplicationExecutor] Heartbeats updated catchup target optime to { ts: Timestamp 1535144753000|351, t: 4 }
      2039-01-15T18:00:00.050-0500 I REPL [SyncSourceFeedback] SyncSourceFeedback error sending update to localhost:27018: InvalidSyncSource: Sync source was cleared. Was localhost:27018
      2039-01-15T18:00:00.050-0500 I REPL [rsSync] Caught up to the latest known optime successfully after becoming primary.
      2039-01-15T18:00:00.050-0500 I REPL [rsSync] Exited primary catch-up mode.
      2039-01-15T18:00:00.059-0500 I REPL [rsBackgroundSync] Replication producer stopped after oplog fetcher finished returning a batch from our sync source. Abandoning this batch of oplog entries and re-evaluating our sync source.
      2039-01-15T18:00:01.051-0500 I - [rsSync] Fatal assertion 28560 BadValue: ts secs too high at src/mongo/db/repl/oplog.cpp 168
      2039-01-15T18:00:01.051-0500 I - [rsSync]

       This will crash the mongod process. Note that this was done during a test of 2038 compatibility and has not been identified as a critical issue in any actual production deployments.

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            Assignee:
            backlog-server-repl Backlog - Replication Team
            Reporter:
            alex.bevilacqua Alex Bevilacqua
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              Dates

              Created:
              Updated: