Current, the easiest way to determine which blocks is missing is using NN web UI or JMX. Unfortunately, because the DEFAULT_MAX_CORRUPT_FILEBLOCKS_RETURNED=100 is hard code in FSNamesystem, only 100 missing blocks can be return by UI and JMX. Even the result of URL "https://nn:50070/fsck?listcorruptfileblocks=1&path=%2F" is limited by this hard code value too.
I did know FSCK can return more than 100 result but due to the security reason(with kerberos), it is very hard to involve to costumer programs and scripts.
So I think it should add a configurable var "maxCorruptFileBlocksReturned" to fix above case.
If community also think it's worth to do, I will patch this. If not, please feel free to tell me the reason.