[jira] [Created] (STORM-2361) Kafka spout - after leader change, it stops committing offsets to ZK

["Ernestas Vaiciukevičius (JIRA)" <ji...@apache.org>]

Ernestas Vaiciukevičius created STORM-2361:
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             Summary: Kafka spout - after leader change, it stops committing offsets to ZK
                 Key: STORM-2361
                 URL: https://issues.apache.org/jira/browse/STORM-2361
             Project: Apache Storm
          Issue Type: Bug
          Components: storm-kafka
    Affects Versions: 1.1.0
            Reporter: Ernestas Vaiciukevičius


After STORM-2296 although Kafka spouts do not generate duplicates, the offsets committment to ZK may stop on recreated PartitionManagers.

This is because ack's for messages emitted by already destroyed PartitionManagers are not routed properly to the new PartitionManagers handling that partition.

E.g: 
  public void ack(Object msgId) {
        KafkaMessageId id = (KafkaMessageId) msgId;
        PartitionManager m = _coordinator.getManager(id.partition);
        if (m != null) {
            m.ack(id.offset);
        }

id.partition is Partition(host, partition, topic), which is different if Kafka broker changed.



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