Hi Xinyu, Thanks for reaching out! I'll try to review this over the coming weekend or the following one if nobody else gets to it before then.
-Ayush On Fri, 23 Oct 2026 at 14:25, Xinyu Tan <[email protected]> wrote: > > Hi Hadoop developers, > > I'd like to request a review of a fix for HADOOP-17611, where DistCp's > parallel file copy (-blocksperchunk) breaks > modification time preservation. > > When -pt is specified, the mapper preserves timestamps on the chunks, but the > subsequent concat operation changes the > final file's modification time. This patch restores the source modification > and access times after concatenation and > checksum validation, only when TIMES preservation is requested. > > The PR adds 14 HDFS contract test cases covering timestamp preservation > enabled/disabled, ordinary/direct/atomic > copies, directory scope, and update/skip behavior, as well as checks for > other preserved attributes. The targeted > regression suite completed with 83 tests passed, 16 skipped, and no failures > or errors. The original implementation > fails the three TIMES-enabled copy-mode cases, which pass with the fix. > > JIRA: https://issues.apache.org/jira/browse/HADOOP-17611 > PR: https://github.com/apache/hadoop/pull/8858 > > Feedback and reviews would be appreciated. > > Thanks, > Xinyu Tan > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
