Paulo Motta created HADOOP-11487:
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Summary: NativeS3FileSystem.getStatus must retry on
FileNotFoundException
Key: HADOOP-11487
URL: https://issues.apache.org/jira/browse/HADOOP-11487
Project: Hadoop Common
Issue Type: Bug
Components: fs, fs/s3
Reporter: Paulo Motta
I'm trying to copy a large amount of files from HDFS to S3 via distcp and I'm
getting the following exception:
{code:java}
2015-01-16 20:53:18,187 ERROR [main] org.apache.hadoop.tools.mapred.CopyMapper:
Failure in copying hdfs://10.165.35.216/hdfsFolder/file.gz to
s3n://s3-bucket/file.gz
java.io.FileNotFoundException: No such file or directory
's3n://s3-bucket/file.gz'
at
org.apache.hadoop.fs.s3native.NativeS3FileSystem.getFileStatus(NativeS3FileSystem.java:445)
at
org.apache.hadoop.tools.util.DistCpUtils.preserve(DistCpUtils.java:187)
at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:233)
at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:45)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:167)
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:1548)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
2015-01-16 20:53:18,276 WARN [main] org.apache.hadoop.mapred.YarnChild:
Exception running child : java.io.FileNotFoundException: No such file or
directory 's3n://s3-bucket/file.gz'
at
org.apache.hadoop.fs.s3native.NativeS3FileSystem.getFileStatus(NativeS3FileSystem.java:445)
at
org.apache.hadoop.tools.util.DistCpUtils.preserve(DistCpUtils.java:187)
at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:233)
at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:45)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:167)
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:1548)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
{code}
However, when I try hadoop fs -ls s3n://s3-bucket/file.gz the file is there. So
probably due to Amazon's S3 eventual consistency the job failure.
In my opinion, in order to fix this problem NativeS3FileSystem.getFileStatus
must use fs.s3.maxRetries property in order to avoid failures like this.
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