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Chris Douglas commented on HDFS-6984: ------------------------------------- Thanks, [~andrew.wang]! I'll commit this shortly. I filed HDFS-12250 to clean up some of the deprecation warnings. bq. Is the release note on this JIRA up to date? There are also misc improvements like removing the acl/enc/ec bits from the WebHDFS AclStatus that we could call out. Sure, I'll update it. bq. Based on code inspection it looks like the wire-format changes are compatible, but it'd be good if you could comment on manual testing As we discussed earlier, including these bits in the AclStatus seemed accidental. I can try a few operations with an old client to make sure there are no errors. I don't have access to environments where these APIs would be stressed. > In Hadoop 3, make FileStatus serialize itself via protobuf > ---------------------------------------------------------- > > Key: HDFS-6984 > URL: https://issues.apache.org/jira/browse/HDFS-6984 > Project: Hadoop HDFS > Issue Type: Improvement > Affects Versions: 3.0.0-alpha1 > Reporter: Colin P. McCabe > Assignee: Colin P. McCabe > Labels: BB2015-05-TBR > Attachments: HDFS-6984.001.patch, HDFS-6984.002.patch, > HDFS-6984.003.patch, HDFS-6984.004.patch, HDFS-6984.005.patch, > HDFS-6984.006.patch, HDFS-6984.007.patch, HDFS-6984.008.patch, > HDFS-6984.009.patch, HDFS-6984.010.patch, HDFS-6984.011.patch, > HDFS-6984.012.patch, HDFS-6984.013.patch, HDFS-6984.014.patch, > HDFS-6984.015.patch, HDFS-6984.nowritable.patch > > > FileStatus was a Writable in Hadoop 2 and earlier. Originally, we used this > to serialize it and send it over the wire. But in Hadoop 2 and later, we > have the protobuf {{HdfsFileStatusProto}} which serves to serialize this > information. The protobuf form is preferable, since it allows us to add new > fields in a backwards-compatible way. Another issue is that already a lot of > subclasses of FileStatus don't override the Writable methods of the > superclass, breaking the interface contract that read(status.write) should be > equal to the original status. > In Hadoop 3, we should just make FileStatus serialize itself via protobuf so > that we don't have to deal with these issues. It's probably too late to do > this in Hadoop 2, since user code may be relying on the existing FileStatus > serialization there. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org