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From "Takanobu Asanuma (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10826) The result of fsck should be CRITICAL when there are unrecoverable ec block groups.
Date Thu, 01 Sep 2016 10:28:20 GMT
Takanobu Asanuma created HDFS-10826:
---------------------------------------

             Summary: The result of fsck should be CRITICAL when there are unrecoverable ec
block groups.
                 Key: HDFS-10826
                 URL: https://issues.apache.org/jira/browse/HDFS-10826
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Takanobu Asanuma
            Assignee: Takanobu Asanuma


For RS-6-3, when there is one ec block group and
1) 0~3 of 9 internal blocks are missing, the result of fsck is HEALTY.
2) 4~8 of 9 internal blocks are missing, the result of fsck is HEALTY.
{noformat}
Erasure Coded Block Groups:
 Total size:    536870912 B
 Total files:   1
 Total block groups (validated):        1 (avg. block group size 536870912 B)
  ********************************
  UNRECOVERABLE BLOCK GROUPS:   1 (100.0 %)
  ********************************
 Minimally erasure-coded block groups:  0 (0.0 %)
 Over-erasure-coded block groups:       0 (0.0 %)
 Under-erasure-coded block groups:      1 (100.0 %)
 Unsatisfactory placement block groups: 0 (0.0 %)
 Default ecPolicy:              RS-DEFAULT-6-3-64k
 Average block group size:      5.0
 Missing block groups:          0
 Corrupt block groups:          0
 Missing internal blocks:       4 (44.444443 %)
FSCK ended at Wed Aug 31 13:42:05 JST 2016 in 4 milliseconds

The filesystem under path '/' is HEALTHY
{noformat}
3) 9 of 9 internal blocks are missing, the result of fsck is CRITICAL. (Because it is regarded
as a missing block group.)

In case 2), the result should be CRITICAL since the ec block group is unrecoverable.



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