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https://issues.apache.org/jira/browse/HADOOP-15273?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-15273:
------------------------------------
    Summary: distcp can't handle remote stores with different checksum 
algorithms  (was: distcp to downgrade on checksum algorithm mismatch to "files 
unchanged")

> distcp can't handle remote stores with different checksum algorithms
> --------------------------------------------------------------------
>
>                 Key: HADOOP-15273
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15273
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: tools/distcp
>    Affects Versions: 3.1.0
>            Reporter: Steve Loughran
>            Priority: Minor
>
> When using distcp without {{-skipCRC}} . If there's a checksum mismatch 
> between src and dest store types (e.g hdfs to s3), then the error message 
> will talk about blocksize, even when its the underlying checksum protocol 
> itself which is the cause for failure
> bq. Source and target differ in block-size. Use -pb to preserve block-sizes 
> during copy. Alternatively, skip checksum-checks altogether, using -skipCrc. 
> (NOTE: By skipping checksums, one runs the risk of masking data-corruption 
> during file-transfer.)
> IF the checksum types are fundamentally different, the error message should 
> say so



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