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HDFS Corrupt Blocks -- NameNode stays in Safe Mode

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author-rank TS
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Created on ‎05-07-2015 06:38 PM - edited ‎05-07-2015 07:29 PM

After adding 2 DataNodes into an existing CDH 5.4 cluster, HDFS has become currupted.

There are quite a few (over 2,000) corrupted blocks!

1) How do I repair them?

2) IF I cannot repair/restore can I get HDFS back to be accessible (leave Safe Mode)??

 

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