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From "Sumit Mohanty (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-2724) If an unreadable file is encountered during log aggregation then aggregated file in HDFS badly formed
Date Wed, 22 Oct 2014 00:56:34 GMT
Sumit Mohanty created YARN-2724:
-----------------------------------

             Summary: 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


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}



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