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  1. Core Server
  2. SERVER-10945

isMaster can return duplicate hosts

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • 2.5.4
    • Affects Version/s: 2.5.2
    • Component/s: Replication
    • Labels:
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      Add a sleep in sharding/read_pref_cmd.js:

      sleep(20000); // sleep long enough for                                                                                                                                                                                                                     
                                                                                                                                                                                                                                             
// Make sure replica set connection is ready                                                                                                                                                                                                 
_awaitRSHostViaRSMonitor(st.rs0.nodeList()[0], {ok: true}, "test-rs0");                                                                                                                                                                      
_awaitRSHostViaRSMonitor(st.rs0.nodeList()[1], {ok: true}, "test-rs0");

      If you set mongos or shell to verbose, you can see the isMaster response in the logs by searching "ReplicaSetMonitor::_checkConnection"

      Show
      Add a sleep in sharding/read_pref_cmd.js: sleep(20000); // sleep long enough for // Make sure replica set connection is ready _awaitRSHostViaRSMonitor(st.rs0.nodeList()[0], {ok: true }, "test-rs0" ); _awaitRSHostViaRSMonitor(st.rs0.nodeList()[1], {ok: true }, "test-rs0" ); If you set mongos or shell to verbose, you can see the isMaster response in the logs by searching "ReplicaSetMonitor::_checkConnection"

      Sample bad response:

      {
setName: "test-rs0",
setVersion: 2,
ismaster: true,
secondary: false,
hosts: [
  "Randolphs-MacBook-Air.local:31100",
  "Randolphs-MacBook-Air.local:31101",
  "Randolphs-MacBook-Air.local:31101"
],
primary: "Randolphs-MacBook-Air.local:31100",
tags: { dc: "ny", tag: "one" },
me: "Randolphs-MacBook-Air.local:31100",
maxBsonObjectSize: 16777216,
maxMessageSizeBytes: 48000000,
localTime: new Date(1380305413050),
maxWireVersion: 1,
minWireVersion: 0,
ok: 1.0
}

      The impact in mongos is that this would cause an assertion failure (and print a stacktrace) and make the nodes unusable (can't perform queries, insert, etc).

            Assignee:
            matt.dannenberg Matt Dannenberg
            Reporter:
            randolph@mongodb.com Randolph Tan
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              Created:
              Updated:
              Resolved: