Zhijie Shen created MAPREDUCE-5940: -------------------------------------- Summary: Avoid negative elapsed time in JHS/MRAM web UI and services Key: MAPREDUCE-5940 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5940 Project: Hadoop Map/Reduce Issue Type: Bug Components: jobhistoryserver, mr-am, webapps Reporter: Zhijie Shen Assignee: Zhijie Shen
Recently we observed a rare bug that an elapsed time of a reducer is going to be negative on JHS web UI and via REST APIs. While the real reason for this bug seems to be clock asynchronization on different hosts, the web frontend should have masked the negative values. However, in the current code, *org.apache.hadoop.mapreduce.v2.app.webapp.dao.** only check whether the elapsed time is -1 or not. -- This message was sent by Atlassian JIRA (v6.2#6252)