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https://issues.apache.org/jira/browse/STORM-940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14629001#comment-14629001
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Brian Johnson commented on STORM-940:
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May be related to https://issues.apache.org/jira/browse/STORM-329 but we are
seeing it in 0.9.5
> Lost messages with netty
> ------------------------
>
> Key: STORM-940
> URL: https://issues.apache.org/jira/browse/STORM-940
> Project: Apache Storm
> Issue Type: Bug
> Affects Versions: 0.9.5
> Reporter: Brian Johnson
>
> We have a topology that mysteriously stopped several times. On the most
> recent occasion it had a max spout pending of 4 and there were 4 transactions
> in zookeeper. We are using transactional topologies and the final bolt in the
> topology is a global grouping with only one task. We have verified that the
> first transaction finished successfully right up to the last line of the
> finish batch, but the tx is still in zookeeper and all of the other
> transactions are waiting on it. I know transactional topologies have been
> deprecated, but regardless this shouldn't happen unless the acks are being
> dropped. We have had a bunch of similar issues since moving to the netty
> based versions and I think there is a serious reliability issue with them.
> Sorry I can't provide code to replicate the issue because the problem is
> intermittent.
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