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nijel commented on HDFS-3512: ----------------------------- Agree with [~umamaheswararao] Closing as not a problem. Feel free to reopen > Delay in scanning blocks at DN side when there are huge number of blocks > ------------------------------------------------------------------------ > > Key: HDFS-3512 > URL: https://issues.apache.org/jira/browse/HDFS-3512 > Project: Hadoop HDFS > Issue Type: Bug > Components: datanode > Affects Versions: 2.0.0-alpha > Reporter: suja s > Assignee: amith > Labels: BB2015-05-TBR > Attachments: HDFS-3512.patch > > > Block scanner maintains the full list of blocks at DN side in a map and there > is no differentiation between the blocks which are already scanned and the > ones not scanend. For every check (ie every 5 secs) it will pick one block > and scan. There are chances that it chooses a block which is already scanned > which leads to further delay in scanning of blcoks which are yet to be > scanned. -- This message was sent by Atlassian JIRA (v6.3.4#6332)