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  1. Java Driver
  2. JAVA-1246

If two instances of the same standalone server is passed to MongoClient, the driver removes it from the cluster monitor

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Minor - P4 Minor - P4
    • 2.12.3, 3.0.0
    • Affects Version/s: 2.12.1
    • Component/s: Cluster Management
    • None
    • Environment:
      Java 1.7
      Debian GNU/Linux
      Single node mongo (dev)

      Hi,

      I've just upgraded our dev. environnement from Mongo Java Driver 2.11.4 to 2.12.1 and I'm getting the following error at each startup of our application :

      mai 14, 2014 12:05:40 PM com.mongodb.MultiServerCluster handleStandAloneChanged
Grave: Expecting a single StandAlone, but found more than one.  Removing localhost:27017 from client view of cluster.

      FYI, I'm using MongoClient(List<ServerAddress> seeds, MongoClientOptions options) constructor so that's my ClusterConnectionMode is "Multiple".

      • In production / staging, I'm providing multiple servers members of replicaset without any issue
      • In devel, I'm providing only a single ServerAddress, localhost:27017 which seems to be the source of this issue

      Going deeper into Mongo Java driver code, I've found that my *ClusterSettings* hosts attribute, contains duplicate values : I can find twice "localhost:27017" ! It seems that hosts should be a Set instead of List.

      Regards,

            Assignee:
            jeff.yemin@mongodb.com Jeffrey Yemin
            Reporter:
            drazzib Damien Raude-Morvan
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              Created:
              Updated:
              Resolved: