[GitHub] markusthoemmes opened a new pull request #2450: Adjust kafka's maximum poll period.

[gi...@git.apache.org]

markusthoemmes opened a new pull request #2450: Adjust kafka's maximum poll period.
URL: https://github.com/apache/incubator-openwhisk/pull/2450
 
 
   Kafka allows setting the maximum period between two polls. As we allow for 5 minutes of action execution, in a fully loaded invoker it might take 5 minutes for the consumer to poll again. To prevent rebalances this value is adjusted accordingly.
   
   Bumping Kafka's version is needed because that value is exposed only in 0.10.1+.
   
   ConsumerGroups are removed (or rather: each Invoker/Controller is in it's own ConsumerGroup) to prevent rebalances to impact other consumers. OpenWhisk does not use ConsumerGroup mechanics anyway.
 
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