[jira] [Created] (KAFKA-880) NoLeaderPartitionSet should be cleared before leader finder thread is started up

["Joel Koshy (JIRA)" <ji...@apache.org>]

Joel Koshy created KAFKA-880:
--------------------------------

             Summary: NoLeaderPartitionSet should be cleared before leader finder thread is started up
                 Key: KAFKA-880
                 URL: https://issues.apache.org/jira/browse/KAFKA-880
             Project: Kafka
          Issue Type: Bug
    Affects Versions: 0.8
            Reporter: Joel Koshy
             Fix For: 0.8


This was a recent regression.

This could prevent the consumer from progressing because fetchers for the currently owned partitions may not be added (depending on the order that the map iterator yields).

I think the fix should be simple - just clear the set after stopping the leader finder thread and stopping fetchers.

{code}
[2013-04-25 17:06:38,377] WARN [sometopic-somehost-1366909575615-f801367d-leader-finder-thread]
, Failed to find leader for Set([sometopic,11], [sometopic,25], [sometopic,24]) (kafka.consumer.ConsumerFetcherManager$Lead
erFinderThread)
java.util.NoSuchElementException: key not found: [sometopic,24]
        at scala.collection.MapLike$class.default(MapLike.scala:223)
        at scala.collection.immutable.Map$Map2.default(Map.scala:110)
        at scala.collection.MapLike$class.apply(MapLike.scala:134)
        at scala.collection.immutable.Map$Map2.apply(Map.scala:110)
        at kafka.consumer.ConsumerFetcherManager$LeaderFinderThread$$anonfun$doWork$4.apply(ConsumerFetcherManager.scala:81)
        at kafka.consumer.ConsumerFetcherManager$LeaderFinderThread$$anonfun$doWork$4.apply(ConsumerFetcherManager.scala:79)
        at scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:80)
        at scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:80)
        at scala.collection.Iterator$class.foreach(Iterator.scala:631)
        at scala.collection.mutable.HashTable$$anon$1.foreach(HashTable.scala:161)
        at scala.collection.mutable.HashTable$class.foreachEntry(HashTable.scala:194)
        at scala.collection.mutable.HashMap.foreachEntry(HashMap.scala:39)
        at scala.collection.mutable.HashMap.foreach(HashMap.scala:80)
        at kafka.consumer.ConsumerFetcherManager$LeaderFinderThread.doWork(ConsumerFetcherManager.scala:79)
        at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:51)
{code}


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