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https://issues.apache.org/jira/browse/CAMEL-7500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bob Browning updated CAMEL-7500:
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Attachment: NettyRedeliveryTest.java
> Concurrent modification of exchange during retry leads to futher processing
> of failed messages
> ----------------------------------------------------------------------------------------------
>
> Key: CAMEL-7500
> URL: https://issues.apache.org/jira/browse/CAMEL-7500
> Project: Camel
> Issue Type: Bug
> Components: camel-netty
> Affects Versions: 2.13.1
> Reporter: Bob Browning
> Attachments: NettyRedeliveryTest.java
>
>
> When a exception occurs on a netty TCP channel such as ChanelClosedException
> then there are two invocations of the producer callback.
> If there is a redelivery handler configured this causes either two threads to
> be added to the scheduled thread-pool which then compete or in the more
> common case the first invocation adds the redelivery thread but in doing so
> clears the exception from the exchange such that when the subsequent callback
> invocation occurs it see's the event as a success and continues routing of
> the exchange.
> Note this also seems to be a cause of negative inflight messages on the route.
> The first callback invocation occurs in the ChannelFutureListener which is
> the usual case.
> The second callback invocation which comes from the ClientChannelHandler
> registered in the DefaultClientPipelineFactory used by the NettyProducer.
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