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  1. Core Server
  2. SERVER-39044

Cannot add session into the cache error code 261

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Duplicate
    • Affects Version/s: 4.0.3
    • Fix Version/s: None
    • Component/s: Internal Code
    • Labels:
      None
    • Operating System:
      ALL
    • Sprint:
      Sharding 2019-02-25
    • Case:

      Description

      We have a MongoDB cluster with the following configuration:

      • 3 config servers (replicatesconfig)
      • 2 shards (replicaset)
      • 3 mongos

      After high load testing we found out that the queries start to fail and we get the following error.

      ok" : 0,
       "errmsg" : "cannot add session into the cache",
       "code" : 261,
       "codeName" : "TooManyLogicalSessions",
       "operationTime" : Timestamp(1547653301, 1),
        "$clusterTime" : {
          "clusterTime" : Timestamp(1547653301, 1),
          "signature" : {
            "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
            "keyId" : NumberLong(0)
        }
      

      Inside mongo logs we could find this message:

      CONTROL [LogicalSessionCacheRefresh] Failed to refresh session cache: NoProgressMade: no progress was made executing batch write op in config.system.sessions after 5 rounds (0 ops completed in 6 rounds total)

      After some research there is no documentation related to this error. What does this error mean? How can we fix it?

        Attachments

        1. mongod_PRIMARY.txt
          13.34 MB
        2. mongod_SECONDARY.txt
          183 kB

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              Assignee:
              misha.tyulenev Misha Tyulenev
              Reporter:
              emarketingsolutions Jaume Valls Vila
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                Updated:
                Resolved: