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https://issues.apache.org/jira/browse/SPARK-11230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shixiong Zhu closed SPARK-11230.
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Resolution: Duplicate
Didn't see SPARK-11098 before creating this one
> Add Outbox to cache the sending messages to resolve the message disorder issue
> ------------------------------------------------------------------------------
>
> Key: SPARK-11230
> URL: https://issues.apache.org/jira/browse/SPARK-11230
> Project: Spark
> Issue Type: Sub-task
> Components: Spark Core
> Reporter: Shixiong Zhu
>
> The current NettyRpc has a message order issue because it uses a thread pool
> to send messages. E.g., running the following two lines,
> {code}
> ref.send("A")
> ref.send("B")
> {code}
> The remote endpoint may see "B" before "A" because sending "A" and "B" are in
> parallel.
> To resolve this issue, we need to add an outbox for each connection, and if
> we are connecting to the remote node, we can just cache the sending messages
> in the outbox and send them one by one when the connection is established.
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