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https://issues.apache.org/jira/browse/HDFS-3696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419182#comment-13419182
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Kihwal Lee commented on HDFS-3696:
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bq. The map heap
The max heap
For reading of 1G piping into a sink that is consuming data at 10 KB/s, VSZ
stayed at 547420 KB and RSZ 87540 KB. It doesn't go OOM but the VM size seems
rather big.
> FsShell put using WebHdfsFileSystem goes OOM when file size is big
> ------------------------------------------------------------------
>
> Key: HDFS-3696
> URL: https://issues.apache.org/jira/browse/HDFS-3696
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.0.0-alpha
> Reporter: Kihwal Lee
> Priority: Critical
> Fix For: 0.23.3, 3.0.0, 2.2.0-alpha
>
>
> When dong "fs -put" to a WebHdfsFileSystem (webhdfs://), the FsShell goes OOM
> if the file size is large. When I tested, 20MB files were fine, but 200MB
> didn't work.
> I also tried reading a large file by issuing "-cat" and piping to a slow sink
> in order to force buffering. The read path didn't have this problem. The
> memory consumption stayed the same regardless of progress.
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