dark_num created HDFS-15552:
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Summary: Let DeadNode Detector also work for EC cases
Key: HDFS-15552
URL: https://issues.apache.org/jira/browse/HDFS-15552
Project: Hadoop HDFS
Issue Type: Sub-task
Components: dfsclient, ec
Affects Versions: 3.3.0
Reporter: dark_num
Fix For: 3.4.0
Currently, the EC stream (`DFSStripedInputStream`) is not handled properly
while exception occurs.
For example, while reading EC-blocks, if the client timed out when connecting
to the DataNode, it will throws `SocketTimeoutException` , then add current DN
to localDeadNode.
However, the local dead nodes will not be removed until the stream is closed,
which will cause *missing block IOException* to be thrown in the use scenario
of Hbase.
So we need to use detector to deal with dead nodes under EC to avoid reading
failures.
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