Daryn Sharp created HADOOP-11019:
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Summary: Queued IPC calls are not aborted if the connection drops
Key: HADOOP-11019
URL: https://issues.apache.org/jira/browse/HADOOP-11019
Project: Hadoop Common
Issue Type: Bug
Components: ipc
Affects Versions: 2.0.0-alpha, 3.0.0
Reporter: Daryn Sharp
Assignee: Daryn Sharp
Once a call is read from the wire and queued, it will be executed even if the
connection has already dropped. If the client closes the connection due to
timeout, perhaps because the server is overloaded, the client's retry will only
exacerbate the problem. One specific example is DNs with large block reports
overwhelming an already unhealthy NN.
Ideally calls should be cancelled when the connection is dropped and/or
connection state should be checked when the call is extracted from the callq,
prior to decoding and invoking the call.
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