[ https://issues.apache.org/jira/browse/HDFS-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tsz Wo Nicholas Sze resolved HDFS-3619. --------------------------------------- Resolution: Not A Problem Resolving as not-a-problem. Please feel free to reopen if you disagree. > isGoodBlockCandidate() in Balancer is not handling properly if replica factor > >3 > -------------------------------------------------------------------------------- > > Key: HDFS-3619 > URL: https://issues.apache.org/jira/browse/HDFS-3619 > Project: Hadoop HDFS > Issue Type: Bug > Components: balancer & mover > Affects Versions: 1.0.0, 2.0.0-alpha > Reporter: Junping Du > Assignee: Junping Du > > Let's assume: > 1. replica factor = 4 > 2. source node in rack 1 has 1st replica, 2nd and 3rd replica are in rack 2, > 4th replica in rack3 and target node is in rack3. > So, It should be good for balancer to move replica from source node to target > node but will return "false" in isGoodBlockCandidate(). I think we can fix it > by simply making judgement that at least one replica node (other than source) > is on the different rack of target node. -- This message was sent by Atlassian JIRA (v6.3.4#6332)