[KAFKA-1919] Metadata request issued with no backoff in new producer if there are no topics

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.8.2.0
• Fix Version/s: 0.8.2.1
• Assignee: Jay Kreps
• Reporter: Jay Kreps
• Reviewer: Jay Kreps
• Created: 04/Feb/15 17:11
• Updated: 22/Feb/15 23:07
• Resolved: 22/Feb/15 00:00

Description

Original report:
We have observed high cpu and high network traffic problem when
1) cluster (0.8.1.1) has no topic
2) KafkaProducer (0.8.2-beta) object is created without sending any traffic

We have observed such problem twice. In both cases, problem went away
immediately after one/any topic is created.

Is this a known issue? Just want to check with the community first before I
spend much time to reproduce it.

I couldn't reproduce the issue with similar setup with unit test code in
IDE. start two brokers with no topic locally on my laptop. create a
KafkaProducer object without sending any msgs. but I only tested with
0.8.2-beta for both broker and producer.

Issue exists in 0.8.2 as well:
I have re-run my unit test with 0.8.2.0. same tight-loop problem happened
after a few mins.