[HADOOP-16932] distcp copy calls getFileStatus() needlessly and can fail against S3

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0, 3.1.2, 3.2.1
• Fix Version/s: 3.3.0
• Component/s: fs/s3, tools/distcp
• Labels: pull-request-available

Environment

Hadoop CDH 6.3

• Assignee: Steve Loughran
• Reporter: Thangamani Murugasamy
• Created: 21/Mar/20 18:14
• Updated: 02/Oct/20 15:57
• Resolved: 09/Apr/20 17:30

Description

Distcp to AWS s3 was working fine on CDH 5.16 with distcp 2.6.0. but after upgrade to CDH 6.3 which comes with distcp-3.0 JAR which is through error as below.

The same error with repeats on Hadoop-distcp-3.2.1.jar as well. Tried with -direct option in 3.2.1, still same error.

 

Error: java.io.FileNotFoundException: No such file or directory: s3a://XXXXXXXXXXXXX/part-00012-baa6a706-3816-4dfa-ba07-0fb56fd38178-c000.snappy.parquet
at org.apache.hadoop.fs.s3a.S3AFileSystem.s3GetFileStatus(S3AFileSystem.java:2255)
at org.apache.hadoop.fs.s3a.S3AFileSystem.innerGetFileStatus(S3AFileSystem.java:2149)
at org.apache.hadoop.fs.s3a.S3AFileSystem.getFileStatus(S3AFileSystem.java:2088)
at org.apache.hadoop.tools.util.DistCpUtils.preserve(DistCpUtils.java:203)
at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:220)
at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:48)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:799)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:347)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:174)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1875)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:168)

Issue Links

• is broken by: HADOOP-8143 Change distcp to have -pb on by default
• relates to: HADOOP-16756 distcp -update to S3A; abfs, etc always overwrites due to block size mismatch
• relates to: HADOOP-13145 In DistCp, prevent unnecessary getFileStatus call when not preserving metadata.
• links to: GitHub Pull Request #1936