Ian Roughley created KAFKA-867:
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Summary: producer transaction issue when metrics lib not correct
Key: KAFKA-867
URL: https://issues.apache.org/jira/browse/KAFKA-867
Project: Kafka
Issue Type: Bug
Reporter: Ian Roughley
When building a producer, I used a different version of metrics (v2.2.0). What
I found in this case was that I could deploy a producer, however the consumer
received 4 copies of each message I sent.
Further investigation let to:
- the timer start method was found in the producer code
- the message was sent to the broker
- the timer method was not found in the producer code, causing an exception to
be thrown
- the exception caused a retry (3 times)
- as the message was already at the broker, there was no rollback
Not sure if this warrant a higher level of handshaking with the broker. But it
is a fairly simple issue to cause (given kafka's currently buit with a
non-published metrics version), that may cause miss-understanding.
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