Kihwal Lee created HDFS-4183: -------------------------------- Summary: Throttle block recovery Key: HDFS-4183 URL: https://issues.apache.org/jira/browse/HDFS-4183 Project: Hadoop HDFS Issue Type: Improvement Components: name-node Affects Versions: 2.0.2-alpha, 0.23.4 Reporter: Kihwal Lee Priority: Critical
When a large number of files are abandoned without closing, a storm of lease expiration follows in about an hour (lease hard limit). For the last block of each file, block recovery is initiated and when the datanode is done, it calls commitBlockSynchronization() is called against namenode. A burst of these calls can slow down namenode considerably. We need to throttle block recovery and/or speed up the rate at which commitBlockSynchronization() is served. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira