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From "J.Andreina (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3119) Overreplicated block is not deleted even after the replication factor is reduced after sync follwed by closing that file
Date Tue, 20 Mar 2012 14:15:39 GMT
Overreplicated block is not deleted even after the replication factor is reduced after sync
follwed by closing that file
------------------------------------------------------------------------------------------------------------------------

                 Key: HDFS-3119
                 URL: https://issues.apache.org/jira/browse/HDFS-3119
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
    Affects Versions: 0.24.0
            Reporter: J.Andreina
            Priority: Minor
             Fix For: 0.24.0, 0.23.2


cluster setup:
--------------

1NN,2 DN,replication factor 2,block report interval 3sec ,block size-256MB

step1: write a file "filewrite.txt" of size 90bytes with sync(not closed) 
step2: change the replication factor to 1  using the command: "./hdfs dfs -setrep 1 /filewrite.txt"
step3: close the file

* At the NN side the file "Decreasing replication from 2 to 1 for /filewrite.txt" , logs has
occured but the overreplicated blocks are not deleted even after the block report is sent
from DN

* while listing the file in the console using "./hdfs dfs -ls " the replication factor for
that file is mentioned as 1

* In fsck report for that files displays that the file is replicated to 2 datanodes


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