How to discover missing or corrupt HDFS data

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I am working on a Hadoop cluster and some of my HDFS data is missing. Is there any way or any command that Hadoop offers to discover missing or corrupt HDFS data?
Sep 19, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 1,817 views

1 answer to this question.

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HDFS supports fsck command to check for various inconsistencies. It is designed for reporting problems with various files, for e.g. missing blocks for a file or under replicated blocks. Unlike a traditional fsck utility for native filesystems, this command does not correct the errors it detects.

HDFS fsck is not a Hadoop shell command. It can be run as 'bin/hadoop fsck'. Fsck can be run on the whole filesystem or on a subset of files.

Hope this will help!
answered Sep 19, 2018 by nitinrawat895
 • 11,380 points

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