MongoClient.islocked() method fails

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    • Type: Bug
    • Resolution: Done
    • Priority: Minor - P4
    • 3.0.3, 3.1.0
    • Affects Version/s: 3.0.0
    • Component/s: Command Operations
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      I am trying to unlock a locked 3.x database. 

      public static void unlockMongoDB(MongoClient m) throws Exception
    {
        String context = "MongoDBHelper-unlockMongoDB: ";
        Logger.info(context + "Checking if MongoDB instance needs to be unlocked");

        if(m.isLocked())
        {
            Logger.info(context + "Unlocking MongoDB instance");
            m.unlock();               
        }
    }

      isLocked() fails with the following stack trace

      13 Jul 2015 02:20:20,893 ERROR ~ Prematurely reached end of stream
13 Jul 2015 02:20:20,894 ERROR ~ com.mongodb.MongoSocketReadException: Prematurely reached end of stream
        at com.mongodb.connection.SocketStream.read(SocketStream.java:88)
        at com.mongodb.connection.InternalStreamConnection.receiveResponseBuffers(InternalStreamConnection.java:491)
        at com.mongodb.connection.InternalStreamConnection.receiveMessage(InternalStreamConnection.java:221)
        at com.mongodb.connection.UsageTrackingInternalConnection.receiveMessage(UsageTrackingInternalConnection.java:102)
        at com.mongodb.connection.DefaultConnectionPool$PooledConnection.receiveMessage(DefaultConnectionPool.java:416)
        at com.mongodb.connection.QueryProtocol.receiveMessage(QueryProtocol.java:282)
        at com.mongodb.connection.QueryProtocol.execute(QueryProtocol.java:229)
        at com.mongodb.connection.QueryProtocol.execute(QueryProtocol.java:38)
        at com.mongodb.connection.DefaultServer$DefaultServerProtocolExecutor.execute(DefaultServer.java:155)
        at com.mongodb.connection.DefaultServerConnection.executeProtocol(DefaultServerConnection.java:219)
        at com.mongodb.connection.DefaultServerConnection.query(DefaultServerConnection.java:166)
        at com.mongodb.operation.FindOperation$1.call(FindOperation.java:397)
        at com.mongodb.operation.FindOperation$1.call(FindOperation.java:394)
        at com.mongodb.operation.OperationHelper.withConnectionSource(OperationHelper.java:195)
        at com.mongodb.operation.OperationHelper.withConnection(OperationHelper.java:168)
        at com.mongodb.operation.FindOperation.execute(FindOperation.java:394)
        at com.mongodb.operation.FindOperation.execute(FindOperation.java:57)
        at com.mongodb.Mongo.execute(Mongo.java:738)
        at com.mongodb.Mongo$2.execute(Mongo.java:725)
        at com.mongodb.DBCollection.findOne(DBCollection.java:737)
        at com.mongodb.DBCollection.findOne(DBCollection.java:710)
        at com.mongodb.DBCollection.findOne(DBCollection.java:657)
        at com.mongodb.DBCollection.findOne(DBCollection.java:646)
        at com.mongodb.Mongo.isLocked(Mongo.java:574)

      Also I have noticed that if I pass the MongoClient object to another function and unlock it, the unlock appears to hang. If I use a try {} finally {} and unlock, it appears to go through.

            Assignee:
            Jeffrey Yemin
            Reporter:
            Dharshan Rangegowda
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              Created:
              Updated:
              Resolved: