[ https://issues.apache.org/jira/browse/HDFS-1541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hairong Kuang updated HDFS-1541: -------------------------------- Attachment: deadnodescheck.patch This patch makes sure that NameNode does not check dead nodes before the under-replication queue is populated. > Not marking datanodes dead When namenode in safemode > ---------------------------------------------------- > > Key: HDFS-1541 > URL: https://issues.apache.org/jira/browse/HDFS-1541 > Project: Hadoop HDFS > Issue Type: Improvement > Components: name-node > Affects Versions: 0.23.0 > Reporter: Hairong Kuang > Assignee: Hairong Kuang > Fix For: 0.23.0 > > Attachments: deadnodescheck.patch > > > In a big cluster, when namenode starts up, it takes a long time for namenode > to process block reports from all datanodes. Because heartbeats processing > get delayed, some datanodes are erroneously marked as dead, then later on > they have to register again, thus wasting time. > It would speed up starting time if the checking of dead nodes is disabled > when namenode in safemode. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.