haiyang1987 opened a new pull request, #5264:
URL: https://github.com/apache/hadoop/pull/5264
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### Description of PR
[HDFS-16879](https://issues.apache.org/jira/browse/HDFS-16879)
For the block of the ec file run hdfs fsck -blockId xxx can add shows number
of redundant internal block replicas.
### For code changes:
for example: the current blockgroup has 10 live replicas, and it will show
there are 9 live replicas.
actually, there is a live replica that should be in the redundant state, can
add shows "No. of redundant Replica: 1"
```
hdfs fsck -blockId blk_-xxx
Block Id: blk_-xxx
Block belongs to: /ec/file1
No. of Expected Replica: 9
No. of live Replica: 9
No. of excess Replica: 0
No. of stale Replica: 0
No. of decommissioned Replica: 0
No. of decommissioning Replica: 0
No. of corrupted Replica: 0
Block replica on datanode/rack: ip-xxx1 is HEALTHY
Block replica on datanode/rack: ip-xxx2 is HEALTHY
Block replica on datanode/rack: ip-xxx3 is HEALTHY
Block replica on datanode/rack: ip-xxx4 is HEALTHY
Block replica on datanode/rack: ip-xxx5 is HEALTHY
Block replica on datanode/rack: ip-xxx6 is HEALTHY
Block replica on datanode/rack: ip-xxx7 is HEALTHY
Block replica on datanode/rack: ip-xxx8 is HEALTHY
Block replica on datanode/rack: ip-xxx9 is HEALTHY
Block replica on datanode/rack: ip-xxx10 is HEALTHY
```
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