[HDFS-8809] HDFS fsck reports under construction blocks as "CORRUPT"

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: tools

Environment

Hadoop 2.7.1 and HBase 1.1.1, on SUSE11sp3 (other Linuxes not tested, probably not platform-dependent). This did NOT happen with Hadoop 2.4 and HBase 0.98.

• Hadoop Flags: Reviewed
• Assignee: Jing Zhao
• Reporter: Sudhir Prakash
• Created: 23/Jul/15 01:34
• Updated: 30/Aug/16 01:30
• Resolved: 20/Aug/15 23:33

Description

Whenever HBase is running, the "hdfs fsck /" reports four hbase-related files in the path "hbase/data/WALs/" as CORRUPT. Even after letting the cluster sit idle for a couple hours, it is still in the corrupt state. If HBase is shut down, the problem goes away. If HBase is then restarted, the problem recurs. This was observed with Hadoop 2.7.1 and HBase 1.1.1, and did NOT happen with Hadoop 2.4 and HBase 0.98.

hades1:/var/opt/teradata/packages # su hdfs
hdfs@hades1:/var/opt/teradata/packages> hdfs fsck /
Connecting to namenode via http://hades1.labs.teradata.com:50070/fsck?ugi=hdfs&path=%2F
FSCK started by hdfs (auth:SIMPLE) from /39.0.8.2 for path / at Wed Jun 24 20:40:17 GMT 2015
...
/apps/hbase/data/WALs/hades4.labs.teradata.com,16020,1435168292684/hades4.labs.teradata.com%2C16020%2C1435168292684.default.1435175500556: MISSING 1 blocks of total size 83 B.
/apps/hbase/data/WALs/hades5.labs.teradata.com,16020,1435168290466/hades5.labs.teradata.com%2C16020%2C1435168290466..meta.1435175562144.meta: MISSING 1 blocks of total size 83 B.
/apps/hbase/data/WALs/hades5.labs.teradata.com,16020,1435168290466/hades5.labs.teradata.com%2C16020%2C1435168290466.default.1435175498500: MISSING 1 blocks of total size 83 B.
/apps/hbase/data/WALs/hades6.labs.teradata.com,16020,1435168292373/hades6.labs.teradata.com%2C16020%2C1435168292373.default.1435175500301: MISSING 1 blocks of total size 83 B..................................................................................................
....................................................................................................
....................................................................................................
........................................................................................Status: CORRUPT
 Total size:    723977553 B (Total open files size: 332 B)
 Total dirs:    79
 Total files:   388
 Total symlinks:                0 (Files currently being written: 5)
 Total blocks (validated):      387 (avg. block size 1870743 B) (Total open file blocks (not validated): 4)
  ********************************
  UNDER MIN REPL'D BLOCKS:      4 (1.0335917 %)
  dfs.namenode.replication.min: 1
  CORRUPT FILES:        4
  MISSING BLOCKS:       4
  MISSING SIZE:         332 B
  ********************************
 Minimally replicated blocks:   387 (100.0 %)
 Over-replicated blocks:        0 (0.0 %)
 Under-replicated blocks:       0 (0.0 %)
 Mis-replicated blocks:         0 (0.0 %)
 Default replication factor:    3
 Average block replication:     3.0
 Corrupt blocks:                0
 Missing replicas:              0 (0.0 %)
 Number of data-nodes:          3
 Number of racks:               1
FSCK ended at Wed Jun 24 20:40:17 GMT 2015 in 7 milliseconds


The filesystem under path '/' is CORRUPT
hdfs@hades1:/var/opt/teradata/packages>

Issue Links

• is duplicated by: AMBARI-12135 After HDP installation, hdfs fsck reporting CORRUPT status (Missing blocks)