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https://issues.apache.org/jira/browse/HADOOP-17531?focusedWorklogId=566343&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-566343
]
ASF GitHub Bot logged work on HADOOP-17531:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 15/Mar/21 16:01
Start Date: 15/Mar/21 16:01
Worklog Time Spent: 10m
Work Description: steveloughran commented on a change in pull request
#2732:
URL: https://github.com/apache/hadoop/pull/2732#discussion_r594463078
##########
File path:
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/test/GenericTestUtils.java
##########
@@ -53,8 +53,10 @@
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
-import
org.apache.hadoop.thirdparty.com.google.common.util.concurrent.ListenableFuture;
+import org.apache.hadoop.thirdparty.com.google.common.base.Charsets;
Review comment:
these need to go into the "other imports" block. Yes, it's a PITA, but
its goal is to manage backporting. And guess what I have to do a lot of?
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Issue Time Tracking
-------------------
Worklog Id: (was: 566343)
Time Spent: 3h 40m (was: 3.5h)
> DistCp: Reduce memory usage on copying huge directories
> -------------------------------------------------------
>
> Key: HADOOP-17531
> URL: https://issues.apache.org/jira/browse/HADOOP-17531
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Ayush Saxena
> Assignee: Ayush Saxena
> Priority: Critical
> Labels: pull-request-available
> Attachments: MoveToStackIterator.patch, gc-NewD-512M-3.8ML.log
>
> Time Spent: 3h 40m
> Remaining Estimate: 0h
>
> Presently distCp, uses the producer-consumer kind of setup while building the
> listing, the input queue and output queue are both unbounded, thus the
> listStatus grows quite huge.
> Rel Code Part :
> https://github.com/apache/hadoop/blob/trunk/hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/SimpleCopyListing.java#L635
> This goes on bredth-first traversal kind of stuff(uses queue instead of
> earlier stack), so if you have files at lower depth, it will like open up the
> entire tree and the start processing....
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