[GitHub] merlimat commented on a change in pull request #963: Partitioned Consumer UnAckedMessageTracker

[GitBox <gi...@apache.org>]

merlimat commented on a change in pull request #963: Partitioned Consumer UnAckedMessageTracker
URL: https://github.com/apache/incubator-pulsar/pull/963#discussion_r156569576
 
 

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 File path: pulsar-client/src/main/java/org/apache/pulsar/client/impl/PartitionedConsumerImpl.java
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 @@ -362,6 +389,7 @@ void messageReceived(Message message) {
             } else {
                 // Enqueue the message so that it can be retrieved when application calls receive()
                 // Waits for the queue to have space for the message
+                lock.readLock().lock();
 
 Review comment:
   We should have already the `readLock` taken here (from line 379). This can lead to deadlock with the write lock.

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