Overreplicated block is not deleted even after the replication factor is
reduced after sync follwed by closing that file
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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:
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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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