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From "Wellington Chevreuil (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-12249) dfsadmin -metaSave to output maintenance mode blocks
Date Wed, 23 Aug 2017 08:17:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-12249?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wellington Chevreuil updated HDFS-12249:
----------------------------------------
    Status: Patch Available  (was: Open)

> 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
>         Attachments: HDFS-12249.001.patch
>
>
> 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deletions maybe out of date) :  2.2.2.2:9866(corrupt) (block deletions maybe out of date)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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