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Xuan Gong commented on YARN-2724: --------------------------------- Thanks for reviewing, [~zjshen]. You are right...It do raise other race conditions. The new patch will fix this. For the ticket, we only consider the issue that can not open fileInputStream... > If an unreadable file is encountered during log aggregation then aggregated > file in HDFS badly formed > ----------------------------------------------------------------------------------------------------- > > Key: YARN-2724 > URL: https://issues.apache.org/jira/browse/YARN-2724 > Project: Hadoop YARN > Issue Type: Bug > Components: log-aggregation > Affects Versions: 2.5.1 > Reporter: Sumit Mohanty > Assignee: Xuan Gong > Attachments: YARN-2724.1.patch, YARN-2724.2.patch > > > Look into the log output snippet. It looks like there is an issue during > aggregation when an unreadable file is encountered. Likely, this results in > bad encoding. > {noformat} > LogType: command-13.json > LogLength: 13934 > Log Contents: > Error aggregating log file. Log file : > /grid/0/yarn/log/application_1413865041660_0002/container_1413865041660_0002_01_000004/command-13.json/grid/0/yarn/log/application_1413865041660_0002/container_1413865041660_0002_01_000004/command-13.json > (Permission denied)command-3.json13983Error aggregating log file. Log file : > /grid/0/yarn/log/application_1413865041660_0002/container_1413865041660_0002_01_000004/command-3.json/grid/0/yarn/log/application_1413865041660_0002/contaierrors-13.txt0660_0002_01_000004/command-3.json > (Permission denied) > > errors-3.txt0gc.log-20141021044514484052014-10-21T04:45:12.046+0000: 5.134: > [GC2014-10-21T04:45:12.046+0000: 5.134: [ParNew: 163840K->15575K(184320K), > 0.0488700 secs] 163840K->15575K(1028096K), 0.0492510 secs] [Times: user=0.06 > sys=0.01, real=0.05 secs] > 2014-10-21T04:45:14.939+0000: 8.027: [GC2014-10-21T04:45:14.939+0000: 8.027: > [ParNew: 179415K->11865K(184320K), 0.0941310 secs] 179415K->17228K(1028096K), > 0.0943140 secs] [Times: user=0.13 sys=0.04, real=0.09 secs] > 2014-10-21T04:46:42.099+0000: 95.187: [GC2014-10-21T04:46:42.099+0000: > 95.187: [ParNew: 175705K->12802K(184320K), 0.0466420 secs] > 181068K->18164K(1028096K), 0.0468490 secs] [Times: user=0.06 sys=0.00, > real=0.04 secs] > {noformat} > Specifically, look at the text after the exception text. There should be two > more entries for log files but none exist. This is likely due to the fact > that command-13.json is expected to be of length 13934 but its is not as the > file was never read. > I think, it should have been > {noformat} > LogType: command-13.json > LogLength: <Length of the exception text> > Log Contents: > Error aggregating log file. Log file : > /grid/0/yarn/log/application_1413865041660_0002/container_1413865041660_0002_01_000004/command-13.json/grid/0/yarn/log/application_1413865041660_0002/container_1413865041660_0002_01_000004/command-13.json > (Permission denied)command-3.json13983Error aggregating log file. Log file : > /grid/0/yarn/log/application_1413865041660_0002/container_1413865041660_0002_01_000004/command-3.json/grid/0/yarn/log/application_1413865041660_0002/contaierrors-13.txt0660_0002_01_000004/command-3.json > (Permission denied) > {noformat} > {noformat} > LogType: errors-3.txt > LogLength:0 > Log Contents: > {noformat} > {noformat} > LogType:gc.log > LogLength:??? > Log Contents: > ......-20141021044514484052014-10-21T04:45:12.046+0000: 5.134: > [GC2014-10-21T04:45:12.046+0000: 5.134: [ParNew: 163840K- ....... > {noformat} -- This message was sent by Atlassian JIRA (v6.3.4#6332)