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https://issues.apache.org/jira/browse/SPARK-12328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shixiong Zhu resolved SPARK-12328.
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Resolution: Duplicate
> Add connectionEstablished callback to RpcHandler to monitor the new
> connections
> -------------------------------------------------------------------------------
>
> Key: SPARK-12328
> URL: https://issues.apache.org/jira/browse/SPARK-12328
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.6.0
> Reporter: Shixiong Zhu
> Assignee: Shixiong Zhu
>
> `NettyRpcHandler` uses a `ConcurrentHashMap` clients to remember if has
> received any messages from a client to avoid firing multiple
> `RemoteProcessConnected`.
> We can add a callback in the RpcHandler to remove the ConcurrentHashMap from
> NettyRpcHandler.
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