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From "Xuan Gong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-2583) Modify the LogDeletionService to support Log aggregation for LRS
Date Mon, 22 Sep 2014 18:49:33 GMT

     [ https://issues.apache.org/jira/browse/YARN-2583?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xuan Gong updated YARN-2583:
----------------------------
    Description: 
Currently, AggregatedLogDeletionService will delete old logs from HDFS. It will check the
cut-off-time, if all logs for this application is older than this cut-off-time. The app-log-dir
from HDFS will be deleted. This will not work for LRS. We expect a LRS application can keep
running for a long time. 
Two different scenarios: 
1) If we configured the rollingIntervalSeconds, the new log file will be always uploaded to
HDFS. The number of log files for this application will become larger and larger. And there
is no log files will be deleted.
2) If we did not configure the rollingIntervalSeconds, the log file can only be uploaded to
HDFS after the application is finished. It is very possible that the logs are uploaded after
the cut-off-time. It will cause problem because at that time the app-log-dir for this application
in HDFS has been deleted.

  was:Currently, AggregatedLogDeletionService will delete old logs from HDFS. It will directly
delete the app-log-dir from HDFS. This will not work for LRS. We expect a LRS application
can keep running for a long time. Deleting the app-log-dir for the LRS applications is not
a right way to handle it.


> Modify the LogDeletionService to support Log aggregation for LRS
> ----------------------------------------------------------------
>
>                 Key: YARN-2583
>                 URL: https://issues.apache.org/jira/browse/YARN-2583
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Xuan Gong
>            Assignee: Xuan Gong
>
> Currently, AggregatedLogDeletionService will delete old logs from HDFS. It will check
the cut-off-time, if all logs for this application is older than this cut-off-time. The app-log-dir
from HDFS will be deleted. This will not work for LRS. We expect a LRS application can keep
running for a long time. 
> Two different scenarios: 
> 1) If we configured the rollingIntervalSeconds, the new log file will be always uploaded
to HDFS. The number of log files for this application will become larger and larger. And there
is no log files will be deleted.
> 2) If we did not configure the rollingIntervalSeconds, the log file can only be uploaded
to HDFS after the application is finished. It is very possible that the logs are uploaded
after the cut-off-time. It will cause problem because at that time the app-log-dir for this
application in HDFS has been deleted.



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