Hung DN stalls write pipeline for far longer than its timeout
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Key: HDFS-915
URL: https://issues.apache.org/jira/browse/HDFS-915
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs client
Affects Versions: 0.20.1
Reporter: Todd Lipcon
After running kill -STOP on the datanode in the middle of a write pipeline, the
client takes far longer to recover than it should. The ResponseProcessor times
out in the correct interval, but doesn't interrupt the DataStreamer, which
appears to not be subject to the same timeout. The client only recovers once
the OS actually declares the TCP stream dead, which can take a very long time.
I've experienced this on 0.20.1, haven't tried it yet on trunk or 0.21.
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