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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3442) Incorrect count for Missing Replicas in FSCK report
Date Thu, 24 May 2012 20:37:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13282689#comment-13282689
] 

Andrew Wang commented on HDFS-3442:
-----------------------------------

Patch submitted. Indeed, the numerator was correct, denominator was not.
                
> Incorrect count for Missing Replicas in FSCK report
> ---------------------------------------------------
>
>                 Key: HDFS-3442
>                 URL: https://issues.apache.org/jira/browse/HDFS-3442
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.0-alpha
>            Reporter: suja s
>            Assignee: Andrew Wang
>            Priority: Minor
>         Attachments: HDFS-3442.patch
>
>
> Scenario:
> Cluster running in HA mode with 2 DNs. Files are written with replication factor as 3.
> There are 7 blocks in cluster.
> FSCK report is including all blocks in UnderReplicated Blocks as well as Missing Replicas.
> HOST-XX-XX-XX-102:/home/Apr4/hadoop-2.0.0-SNAPSHOT/bin # ./hdfs fsck /
> Connecting to namenode via http://XX.XX.XX.55:50070
> FSCK started by root (auth:SIMPLE) from /XX.XX.XX.102 for path / at Wed Apr 04 17:28:37
IST 2012
> .
> /1:  Under replicated BP-534619337-XX.XX.XX.55-1333526344705:blk_2551710840802340037_1002.
Target Replicas is 3 but found 2 replica(s).
> .
> /2:  Under replicated BP-534619337-XX.XX.XX.55-1333526344705:blk_-3851276776144500288_1004.
Target Replicas is 3 but found 2 replica(s).
> .
> /3:  Under replicated BP-534619337-XX.XX.XX.55-1333526344705:blk_-3210606555285049524_1006.
Target Replicas is 3 but found 2 replica(s).
> .
> /4:  Under replicated BP-534619337-XX.XX.XX.55-1333526344705:blk_4028835120510075310_1008.
Target Replicas is 3 but found 2 replica(s).
> .
> /5:  Under replicated BP-534619337-XX.XX.XX.55-1333526344705:blk_-5238093749956876969_1010.
Target Replicas is 3 but found 2 replica(s).
> .
> /testrenamed/file1renamed:  Under replicated BP-534619337-XX.XX.XX.55-1333526344705:blk_-5669194716756513504_1012.
Target Replicas is 3 but found 2 replica(s).
> .
> /testrenamed/file2:  Under replicated BP-534619337-XX.XX.XX.55-1333526344705:blk_8510284478280941311_1014.
Target Replicas is 3 but found 2 replica(s).
> Status: HEALTHY
>  Total size:    33215 B
>  Total dirs:    3
>  Total files:   7 (Files currently being written: 1)
>  Total blocks (validated):      7 (avg. block size 4745 B)
>  Minimally replicated blocks:   7 (100.0 %)
>  Over-replicated blocks:        0 (0.0 %)
>  Under-replicated blocks:       7 (100.0 %)
>  Mis-replicated blocks:         0 (0.0 %)
>  Default replication factor:    3
>  Average block replication:     2.0
>  Corrupt blocks:                0
>  Missing replicas:              7 (50.0 %)
>  Number of data-nodes:          2
>  Number of racks:               1
> FSCK ended at Wed Apr 04 17:28:37 IST 2012 in 2 milliseconds
> The filesystem under path '/' is HEALTHY
> Also it indicates a measure as 50% in brackets (There are only 7 blocks in cluster and
so if all 7 are included as Missing replicas it should be 100%)

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