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https://issues.apache.org/jira/browse/HDFS-5788?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nathan Roberts updated HDFS-5788:
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Attachment: HDFS-5788.patch
patch for trunk.
> listLocatedStatus response can be very large
> --------------------------------------------
>
> Key: HDFS-5788
> URL: https://issues.apache.org/jira/browse/HDFS-5788
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 3.0.0, 0.23.10, 2.2.0
> Reporter: Nathan Roberts
> Assignee: Nathan Roberts
> Attachments: HDFS-5788.patch
>
>
> Currently we limit the size of listStatus requests to a default of 1000
> entries. This works fine except in the case of listLocatedStatus where the
> location information can be quite large. As an example, a directory with 7000
> entries, 4 blocks each, 3 way replication - a listLocatedStatus response is
> over 1MB. This can chew up very large amounts of memory in the NN if lots of
> clients try to do this simultaneously.
> Seems like it would be better if we also considered the amount of location
> information being returned when deciding how many files to return.
> Patch will follow shortly.
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