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https://issues.apache.org/jira/browse/HADOOP-9229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13557313#comment-13557313
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Todd Lipcon commented on HADOOP-9229:
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Hey Kihwal. Have you been watching HDFS-4404? Looks like basically the same
issue, if I'm understanding you correctly. In particular, see this comment:
https://issues.apache.org/jira/browse/HDFS-4404?focusedCommentId=13555680&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13555680
> IPC: Retry on connection reset or socket timeout during SASL negotiation
> ------------------------------------------------------------------------
>
> Key: HADOOP-9229
> URL: https://issues.apache.org/jira/browse/HADOOP-9229
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc
> Affects Versions: 3.0.0, 2.0.3-alpha, 0.23.7
> Reporter: Kihwal Lee
>
> When an RPC server is overloaded, incoming connections may not get accepted
> in time, causing listen queue overflow. The impact on client varies depending
> on the type of OS in use. On Linux, connections in this state look fully
> connected to the clients, but they are without buffers, thus any data sent to
> the server will get dropped.
> This won't be a problem for protocols where client first wait for server's
> greeting. Even for clients-speak-first protocols, it will be fine if the
> overload is transient and such connections are accepted before the
> retransmission of dropped packets arrive. Otherwise, clients can hit socket
> timeout after several retransmissions. In certain situations, connection
> will get reset while clients still waiting for ack.
> We have seen this happening to IPC clients during SASL negotiation. Since no
> call has been sent, we should allow retry when connection reset or socket
> timeout happens in this stage.
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