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https://issues.apache.org/jira/browse/SPARK-704?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen updated SPARK-704:
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Component/s: Spark Core
> ConnectionManager sometimes cannot detect loss of sending connections
> ---------------------------------------------------------------------
>
> Key: SPARK-704
> URL: https://issues.apache.org/jira/browse/SPARK-704
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Reporter: Charles Reiss
> Assignee: Henry Saputra
>
> ConnectionManager currently does not detect when SendingConnections
> disconnect except if it is trying to send through them. As a result, a node
> failure just after a connection is initiated but before any acknowledgement
> messages can be sent may result in a hang.
> ConnectionManager has code intended to detect this case by detecting the
> failure of a corresponding ReceivingConnection, but this code assumes that
> the remote host:port of the ReceivingConnection is the same as the
> ConnectionManagerId, which is almost never true. Additionally, there does not
> appear to be any reason to assume a corresponding ReceivingConnection will
> exist.
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