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https://issues.apache.org/jira/browse/MAPREDUCE-7287?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhengchenyu updated MAPREDUCE-7287:
-----------------------------------
Description:
hdfs://ns1/tmp/a is an existing file, hdfs://ns2/tmp/a is also an existing file.
When I run this command,
{code:java}
hadoop distcp -delete -update hdfs://ns1/tmp/a hdfs://ns2/tmp/a
{code}
I Found hdfs://ns2/tmp/a is deleted unpectectedly.
was:
hdfs://ns1/tmp/a is an existing file, hdfs://ns2/tmp/a is also an existing file.
When I run this command,
{code}
hadoop distcp -delete -update hdfs://ns1/tmp/a hdfs://ns2/tmp/a
{code}
I Found hdfs://ns2/tmp/a is deleted unpectectedly.
Then problem is DeletedDirTracker. Because here we only distcp a file (not a
directory), the varialbe `directories` in DeletedDirTracker is not set.
Maybe I think DeletedDirTracker only consider directory in design stage. But we
distcp only a file, they are deleted unpectectedly.
> Distcp will delete exists file , If we use "--delete and --update" options
> and distcp file.
> --------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-7287
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7287
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: distcp
> Affects Versions: 3.2.1
> Reporter: zhengchenyu
> Priority: Major
> Fix For: 3.3.1
>
>
> hdfs://ns1/tmp/a is an existing file, hdfs://ns2/tmp/a is also an existing
> file.
> When I run this command,
> {code:java}
> hadoop distcp -delete -update hdfs://ns1/tmp/a hdfs://ns2/tmp/a
> {code}
> I Found hdfs://ns2/tmp/a is deleted unpectectedly.
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