DFSOutputStream.sync should not be synchronized -----------------------------------------------
Key: HDFS-3280 URL: https://issues.apache.org/jira/browse/HDFS-3280 Project: Hadoop HDFS Issue Type: Bug Components: hdfs client Affects Versions: 2.0.0 Reporter: Todd Lipcon Assignee: Todd Lipcon Priority: Critical HDFS-895 added an optimization to make hflush() much faster by unsynchronizing it. But, we forgot to un-synchronize the deprecated {{sync()}} wrapper method. This makes the HBase WAL really slow on 0.23+ since it doesn't take advantage of HDFS-895 anymore. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira