kafka-jira mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jason Gustafson (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KAFKA-6609) Offset commit reordering possible on coordinator disconnect
Date Sat, 03 Mar 2018 21:26:00 GMT
Jason Gustafson created KAFKA-6609:
--------------------------------------

             Summary: Offset commit reordering possible on coordinator disconnect
                 Key: KAFKA-6609
                 URL: https://issues.apache.org/jira/browse/KAFKA-6609
             Project: Kafka
          Issue Type: Improvement
          Components: consumer
            Reporter: Jason Gustafson


When reconnecting to the coordinator following a disconnect, it is possible for offset commits
sent prior to the disconnect to be received _after_ offset commits sent on the new connection.
This is rare in practice because offset commits are not sent that frequently and there is
some latency following a coordinator disconnect in order to rediscover the coordinator. I
have, however, observed this happening in a failing system test. We were more likely to hit
it in the test scenario due to KAFKA-6606, which caused more inflight offset commit requests
than we would usually see.

I am not sure how important it is to fix this since the scenario is unlikely in practice,
but one solution would be to steal a page from the the idempotent producer and add sequence
numbers to offset commit requests.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Mime
View raw message