[ https://issues.apache.org/jira/browse/HDFS-9127?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vinayakumar B resolved HDFS-9127. --------------------------------- Resolution: Invalid This problem doesnt exist on latest code. Feel free to re-open if found again. > Re-replication for files with enough replicas in single rack > ------------------------------------------------------------ > > Key: HDFS-9127 > URL: https://issues.apache.org/jira/browse/HDFS-9127 > Project: Hadoop HDFS > Issue Type: Bug > Reporter: Brahma Reddy Battula > Assignee: Brahma Reddy Battula > > Found while debugging testcases in HDFS-8647 > *Scenario:* > ======= > Start a cluster with Single rack with three DN's > write a file with RF=3 > adde two Nodes with different racks > As per blockplacement policy ([Rack > Awareness|http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/RackAwareness.html]) > atleast one replica needs to replicate to newly added rack.But it is not > happening..Because of following reason. > {color:blue} > when cluster was single rack,block will be removed from > {{neededReplications}} after 3 replicas. > later, after adding new rack, only replications will happen which are present > in {{neededReplications}} > So for the blocks which already have enough replicas, new rack replications > will not take place.. > {color} -- This message was sent by Atlassian JIRA (v6.3.4#6332)