Xingjun Hao created YARN-11054: ---------------------------------- Summary: Alleviate LocalJobRunnerMetricName Conflicts Key: YARN-11054 URL: https://issues.apache.org/jira/browse/YARN-11054 Project: Hadoop YARN Issue Type: Improvement Affects Versions: 3.3.1 Reporter: Xingjun Hao Fix For: 3.3.1
In some scenarios, Sqoop will use LocalJobRuner (YarnLocal mode) to run a lot of jobs, assuming 2 million jobs have been run, LocalJobRunner MetricName generated by nextInt function is in the range of (0, 2147483647), Then the probability of conflict is about 2000/2147483647 = 1/1000, which means that an average of 1 task will fail for every 1000 jobs run. If LocalJobRunner MetricName is generated by nextLong() whose range is (0, 9223372036854775807), considering that Long's range is 1 billion times that of Int, the probability of a new MetricName conflicts is also reduced by one trillionth times. the probability of conflict also goes to 1/500000000 from 1/1000. ( under the situation that there are about 200million jobs have been run) -- This message was sent by Atlassian Jira (v8.20.1#820001) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-dev-h...@hadoop.apache.org