[ https://issues.apache.org/jira/browse/HDFS-9205?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tsz Wo Nicholas Sze updated HDFS-9205: -------------------------------------- Resolution: Fixed Hadoop Flags: Reviewed Fix Version/s: 3.0.0 Status: Resolved (was: Patch Available) Thanks Jing for reviewing the patch. I have committed this. > Do not schedule corrupt blocks for replication > ---------------------------------------------- > > Key: HDFS-9205 > URL: https://issues.apache.org/jira/browse/HDFS-9205 > Project: Hadoop HDFS > Issue Type: Improvement > Components: namenode > Reporter: Tsz Wo Nicholas Sze > Assignee: Tsz Wo Nicholas Sze > Priority: Minor > Fix For: 3.0.0 > > Attachments: h9205_20151007.patch, h9205_20151007b.patch, > h9205_20151008.patch, h9205_20151009.patch, h9205_20151009b.patch, > h9205_20151013.patch, h9205_20151015.patch > > > Corrupted blocks by definition are blocks cannot be read. As a consequence, > they cannot be replicated. In UnderReplicatedBlocks, there is a queue for > QUEUE_WITH_CORRUPT_BLOCKS and chooseUnderReplicatedBlocks may choose blocks > from it. It seems that scheduling corrupted block for replication is wasting > resource and potentially slow down replication for the higher priority blocks. -- This message was sent by Atlassian JIRA (v6.3.4#6332)