Neha Narkhede created KAFKA-513:
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Summary: Add state change log to Kafka brokers
Key: KAFKA-513
URL: https://issues.apache.org/jira/browse/KAFKA-513
Project: Kafka
Issue Type: Sub-task
Reporter: Neha Narkhede
Priority: Blocker
Once KAFKA-499 is checked in, every controller to broker communication can be
modelled as a state change for one or more partitions. Every state change
request will carry the controller epoch. If there is a problem with the state
of some partitions, it will be good to have a tool that can create a timeline
of requested and completed state changes. This will require each broker to
output a state change log that has entries like
[2012-09-10 10:06:17,280] broker 1 received request LeaderAndIsr() for
partition [foo, 0]
[2012-09-10 10:06:17,350] broker 1 completed request LeaderAndIsr() for
partition [foo, 0]
On controller, this will look like -
[2012-09-10 10:06:17,198] controller 2 initiated state change request
LeaderAndIsr() for partition [foo, 0]
We need a tool that can collect the state change log from all brokers and
create a per-partition timeline of state changes -
[foo, 0]
[2012-09-10 10:06:17,198] controller 2 initiated state change request
LeaderAndIsr()
[2012-09-10 10:06:17,280] broker 1 received request LeaderAndIsr()
[2012-09-10 10:06:17,350] broker 1 completed request LeaderAndIsr()
This JIRA involves adding the state change log to each broker and adding the
tool to create the timeline
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