Kihwal Lee created HDFS-5522:
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Summary: Datanode disk error check may be incorrectly skipped
Key: HDFS-5522
URL: https://issues.apache.org/jira/browse/HDFS-5522
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.2.0, 0.23.9
Reporter: Kihwal Lee
Fix For: 2.3.0, 0.23.11
After HDFS-4581 and HDFS-4699, {{checkDiskError()}} is not called when network
errors occur during processing data node requests. This appears to create
problems when a disk is having problems, but not failing I/O soon.
If I/O hangs for a long time, network read/write may timeout first and the peer
may close the connection. Although the error was caused by a faulty local disk,
disk check is not being carried out in this case.
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