Gruust created HDFS-12649:
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Summary: handling of corrupt blocks not suitable for commodity
hardware
Key: HDFS-12649
URL: https://issues.apache.org/jira/browse/HDFS-12649
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Affects Versions: 2.8.1
Reporter: Gruust
Priority: Minor
Hadoop's documentation tells me it's suitable for commodity hardware in the
sense that hardware failures are expected to happen frequently. However, there
is currently no automatic handling of corrupted blocks, which seems a bit
contradictory to me.
See: https://stackoverflow.com/questions/19205057/how-to-fix-corrupt-hdfs-files
This is even problematic for data integrity as the redundancy is not kept at
the desired level without manual intervention. If there is a corrupted block, I
would at least expect that the namenode forces the creation of an additional
good replica to keep up the redundancy level.
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