Hmmm.. I guess that you can try to read this file using
$ hadoop fs -cat <file-with-corrupt-replica> to detect that
When reading a file its checksums are calculated and compared to checksums that were calculated during a write operation. If verification fails, NN is notified about the corrupt replica and you will fetch a different replica from another DN to read that file. 2013/12/12 ch huang <[EMAIL PROTECTED]>
> hi,maillist: > what is the sample way to corrupt a replica of a block ,i opened a > replica data file ,and delete a line,than use fsck ,nothing corrupt, > should the DN be restarted? >
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