[
https://issues.apache.org/jira/browse/STORM-2343?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jungtaek Lim updated STORM-2343:
--------------------------------
Priority: Critical (was: Major)
> New Kafka spout can stop emitting tuples if more than maxUncommittedOffsets
> tuples fail at once
> -----------------------------------------------------------------------------------------------
>
> Key: STORM-2343
> URL: https://issues.apache.org/jira/browse/STORM-2343
> Project: Apache Storm
> Issue Type: Bug
> Components: storm-kafka-client
> Affects Versions: 2.0.0, 1.1.0
> Reporter: Stig Rohde Døssing
> Assignee: Stig Rohde Døssing
> Priority: Critical
> Time Spent: 6h
> Remaining Estimate: 0h
>
> It doesn't look like the spout is respecting maxUncommittedOffsets in all
> cases. If the underlying consumer returns more records in a call to poll()
> than maxUncommittedOffsets, they will all be added to waitingToEmit. Since
> poll may return up to 500 records by default (Kafka 0.10.1.1), this is pretty
> likely to happen with low maxUncommittedOffsets.
> The spout only checks for tuples to retry if it decides to poll, and it only
> decides to poll if numUncommittedOffsets < maxUncommittedOffsets. Since
> maxUncommittedOffsets isn't being respected when retrieving or emitting
> records, numUncommittedOffsets can be much larger than maxUncommittedOffsets.
> If more than maxUncommittedOffsets messages fail, this can cause the spout to
> stop polling entirely.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
