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  1. Java Driver
  2. JAVA-2123

Spurious exception logged while ensuring minimum pool size

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Minor - P4 Minor - P4
    • 3.3.0
    • Affects Version/s: 3.2.0
    • Component/s: Configuration
    • None

      I got the following error when updated to java mongo driver 3.2.2:

      2016-02-24 07:15:20,383 ws-dashboard WARN [pool-1-thread-1] org.mongodb.driver.connection [SLF4JLogger.java:91] Exception thrown while ensuring minimum pool size
com.mongodb.MongoInterruptedException: Interrupted acquiring a permit to retrieve an item from the pool 
	at com.mongodb.internal.connection.ConcurrentPool.acquirePermit(ConcurrentPool.java:186) ~[mongo-java-driver-3.2.2.jar:na]
	at com.mongodb.internal.connection.ConcurrentPool.get(ConcurrentPool.java:126) ~[mongo-java-driver-3.2.2.jar:na]
	at com.mongodb.internal.connection.ConcurrentPool.get(ConcurrentPool.java:109) ~[mongo-java-driver-3.2.2.jar:na]
	at com.mongodb.internal.connection.PowerOfTwoBufferPool.getBuffer(PowerOfTwoBufferPool.java:76) ~[mongo-java-driver-3.2.2.jar:na]
	at com.mongodb.connection.SocketStream.read(SocketStream.java:81) ~[mongo-java-driver-3.2.2.jar:na]
	at com.mongodb.connection.InternalStreamConnection.receiveResponseBuffers(InternalStreamConnection.java:503) ~[mongo-java-driver-3.2.2.jar:na]
	at com.mongodb.connection.InternalStreamConnection.receiveMessage(InternalStreamConnection.java:221) ~[mongo-java-driver-3.2.2.jar:na]
	at com.mongodb.connection.CommandHelper.receiveReply(CommandHelper.java:134) ~[mongo-java-driver-3.2.2.jar:na]
	at com.mongodb.connection.CommandHelper.receiveCommandResult(CommandHelper.java:121) ~[mongo-java-driver-3.2.2.jar:na]
	at com.mongodb.connection.CommandHelper.executeCommand(CommandHelper.java:32) ~[mongo-java-driver-3.2.2.jar:na]
	at com.mongodb.connection.InternalStreamConnectionInitializer.initializeConnectionDescription(InternalStreamConnectionInitializer.java:83) ~[mongo-java-driver-3.2.2.jar:na]

      Here is how I create MongoClientOptions:

      public MongoClientOptions mongoClientOptions() {
        return
            MongoClientOptions
                .builder()
                .connectionsPerHost(connectionsPerHost)
                .minConnectionsPerHost(connectionsPerHost)
                .writeConcern(WriteConcern.SAFE)
                .readPreference(
                    readFrom == ReadFrom.PRIMARY
                        ? ReadPreference.primary()
                        : ReadPreference.secondary()
                )
                .connectTimeout(connectTimeout)
                .build();
    }

      If I comment out:

      .minConnectionsPerHost(connectionsPerHost)

      The exception goes away.

      Tested to work without issues on:
      3.0.2 works
      3.0.4 works
      3.1.1 works

      But switching to 3.2.1 or 3.2.2 causes the exception to be raised.

            Assignee:
            jeff.yemin@mongodb.com Jeffrey Yemin
            Reporter:
            apara Alex Paransky
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              Created:
              Updated:
              Resolved: