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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-12249) dfsadmin -metaSave to output maintenance mode blocks
Date Wed, 02 Aug 2017 16:29:01 GMT
Wei-Chiu Chuang created HDFS-12249:
--------------------------------------

             Summary: dfsadmin -metaSave to output maintenance mode blocks
                 Key: HDFS-12249
                 URL: https://issues.apache.org/jira/browse/HDFS-12249
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
            Reporter: Wei-Chiu Chuang
            Assignee: Wellington Chevreuil
            Priority: Minor


Found while reviewing for HDFS-12182.

{quote}
After the patch, the output of metaSave is:
Live Datanodes: 0
Dead Datanodes: 0
Metasave: Blocks waiting for reconstruction: 0
Metasave: Blocks currently missing: 1
file16387: blk_0_1 MISSING (replicas: l: 0 d: 0 c: 2 e: 0)  1.1.1.1:9866(corrupt) (block deletions
maybe out of date) :  2.2.2.2:9866(corrupt) (block deletions maybe out of date) : 
Mis-replicated blocks that have been postponed:
Metasave: Blocks being reconstructed: 0
Metasave: Blocks 0 waiting deletion from 0 datanodes.
Corrupt Blocks:
Block=0	Node=1.1.1.1:9866	StorageID=s1	StorageState=NORMAL	TotalReplicas=2	Reason=GENSTAMP_MISMATCH
Block=0	Node=2.2.2.2:9866	StorageID=s2	StorageState=NORMAL	TotalReplicas=2	Reason=GENSTAMP_MISMATCH
Metasave: Number of datanodes: 0
{quote}

{quote}
Looking at the output
The output is not user friendly — The meaning of "(replicas: l: 0 d: 0 c: 2 e: 0)" is not
obvious without looking at the code.
Also, it should print maintenance mode replicas.
{quote}



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