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https://issues.apache.org/jira/browse/IMPALA-6159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Ho reassigned IMPALA-6159:
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Assignee: Michael Ho
> DataStreamSender should transparently handle some connection reset by peer
> --------------------------------------------------------------------------
>
> Key: IMPALA-6159
> URL: https://issues.apache.org/jira/browse/IMPALA-6159
> Project: IMPALA
> Issue Type: Sub-task
> Components: Distributed Exec
> Affects Versions: Impala 2.12.0
> Reporter: Michael Ho
> Assignee: Michael Ho
> Priority: Critical
>
> A client to server KRPC connection can become stale if the socket was closed
> on the server side due to various reasons such as idle connection removal or
> remote Impalad restart. Currently, the KRPC code will invoke the callback of
> all RPCs using that stale connection with the failed status (e.g. "Connection
> reset by peer"). DataStreamSender should pattern match against certain error
> string (as they are mostly output from strerror()) and retry the RPC
> transparently. This may be also be useful for KUDU-2192 which tracks the
> effort to detect stuck connection and close them. In which case, we may also
> want to transparently retry the RPC
> FWIW, KUDU-279 is tracking the effort to have a cleaner protocol for
> connection teardown due to idle client connection removal on the server side.
> However, Impala still needs to handle other reasons for a stale connection.
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