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https://issues.apache.org/jira/browse/KAFKA-4739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15861745#comment-15861745
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Sagar Sadashiv Patwardhan commented on KAFKA-4739:
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[~hachikuji] [~huxi_2b] Thanks for getting back to us. We really appreciate 
your help! :)

It is interesting to see that between L151 and L178 of 
https://gist.github.com/neoeahit/3a0a5027bc3499b85cb888918faac2a3 kafka client 
does not send any requests to the broker. We get successful heartbeat responses 
from the coordinator, but we still timeout for some reason after ~40 
secs(default request.timeout.ms). I have not read the client code in detail(may 
be I should), but if the heartbeats are successful, then why are we timing out? 
Also, the request timeout is 500 msec per documentation, so how is this timeout 
related to request.timeout.ms(40 secs).

> KafkaConsumer poll going into an infinite loop
> ----------------------------------------------
>
>                 Key: KAFKA-4739
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4739
>             Project: Kafka
>          Issue Type: Bug
>          Components: consumer
>    Affects Versions: 0.9.0.1
>            Reporter: Vipul Singh
>
> We are seeing an issue with our kafka consumer where it seems to go into an 
> infinite loop while polling, trying to fetch data from kafka. We are seeing 
> the heartbeat requests on the broker from the consumer, but nothing else from 
> the kafka consumer.
> We enabled debug level logging on the consumer, and see these logs: 
> https://gist.github.com/neoeahit/757bff7acdea62656f065f4dcb8974b4
> And this just goes on. The way we have been able to replicate this issue, is 
> by restarting the process in multiple successions.



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