Varun Vasudev commented on YARN-2137:

No sorry. I should have been more clear. 
 - the "yarn logs" command is used to dump the logs that you aggregate on the 
remote log dir. Have you confirmed that it uses the right FileContext?

> Add support for logaggregation to a path on non-default filecontext
> -------------------------------------------------------------------
>                 Key: YARN-2137
>                 URL: https://issues.apache.org/jira/browse/YARN-2137
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: log-aggregation
>    Affects Versions: 2.4.0
>            Reporter: Sumit Kumar
>         Attachments: YARN-2137.patch
> Current log-aggregation implementation supports logaggregation to default 
> filecontext only. This patch is to support logaggregation to any of the 
> supported filesystems within hadoop eco-system (hdfs, s3, swiftfs etc). So 
> for example a customer could use hdfs as default filesystem but use s3 or 
> swiftfs for logaggregation. Current implementation makes mixed usages of 
> FileContext+AbstractFileSystem apis as well as FileSystem apis which is 
> confusing.
> This patch does two things:
> # moves logaggregation implementation to use only FileContext apis
> # adds support for doing log aggregation on non-default filesystem as well.
> # changes TestLogAggregationService to use local filesystem itself instead of 
> mocking the behavior

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