Sriram Subramanian created KAFKA-766:
----------------------------------------
Summary: Isr shrink/expand check is fragile
Key: KAFKA-766
URL: https://issues.apache.org/jira/browse/KAFKA-766
Project: Kafka
Issue Type: Bug
Affects Versions: 0.8
Reporter: Sriram Subramanian
Assignee: Neha Narkhede
Fix For: 0.8
Currently the isr check is coupled tightly with the produce batch size. For
example, if the producer batch size is 10000 messages and isr check is 4000
messages, we continuously oscillate between shrinking isr and expanding isr
every second. This is because a single produce request throws the replica out
of the isr. This results in hundreds of calls to ZK (we still dont have multi
write). This can be alleviated by making the producer batch size smaller than
the isr check size.
Going forward, we should try to not have this coupling. It is worth
investigating if we can make the check more robust under such scenarios.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
