Paul Han created YARN-1130: ------------------------------ Summary: Improve the log flushing for tasks when mapred.userlog.limit.kb is set Key: YARN-1130 URL: https://issues.apache.org/jira/browse/YARN-1130 Project: Hadoop YARN Issue Type: Bug Components: nodemanager Affects Versions: 2.0.5-alpha Reporter: Paul Han
When userlog limit is set with something like this: {code} <property> <name>mapred.userlog.limit.kb</name> <value>2048</value> <description>The maximum size of user-logs of each task in KB. 0 disables the cap. </description> </property> {code} the log entry will be truncated randomly for the jobs. The log size is left between 1.2MB to 1.6MB. Since the log is already limited, avoid the log truncation is crucial for user. The other issue with the current impl(org.apache.hadoop.yarn.ContainerLogAppender) will not write to log until the container shutdown and logmanager close all appenders. If user likes to see the log during task execution, it doesn't support it. Will propose a patch to add a flush mechanism and also flush the log when task is done. -- 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