RAbreu created STORM-2994:
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             Summary: KafkaSpout consumes messages but doesn't commit offsets
                 Key: STORM-2994
                 URL: https://issues.apache.org/jira/browse/STORM-2994
             Project: Apache Storm
          Issue Type: Bug
          Components: storm-kafka-client
    Affects Versions: 1.1.2, 1.1.0
            Reporter: RAbreu


A topology that consumes from two different Kafka clusters: 0.10.1.1 and 
0.10.2.1.

Spouts consuming from 0.10.2.1 have a low lag (and regularly commit offsets) 

The Spout that consumes from 0.10.1.1 exhibits either:

1- Unknown lag

2- Lag that increments as the Spout reads messages from Kafka

 

In DEBUG, Offset manager logs: "topic-partition has NO offsets ready to be 
committed", despite continuing to consume messages.

Several configuration tweaks were tried, including setting maxRetries to 1, in 
case messages with a lower offset were being retried (logs didn't show it, 
though)

offsetCommitPeriodMs was also  lowered to no avail.

The only configuration that works is to have 
ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG=true, but this is undesirable since we 
lose processing guarantees.

 



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