Philipp Schuegerl created HDFS-7526:
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             Summary: SetReplication OutOfMemoryError
                 Key: HDFS-7526
                 URL: https://issues.apache.org/jira/browse/HDFS-7526
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.3.0
            Reporter: Philipp Schuegerl


Setting the replication of a HDFS folder recursively can run out of memory. 
E.g. with a large /var/log directory:

hdfs dfs -setrep -R -w 1 /var/log

Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit 
exceeded
        at java.util.Arrays.copyOfRange(Arrays.java:2694)
        at java.lang.String.<init>(String.java:203)
        at java.lang.String.substring(String.java:1913)
        at java.net.URI$Parser.substring(URI.java:2850)
        at java.net.URI$Parser.parse(URI.java:3046)
        at java.net.URI.<init>(URI.java:753)
        at org.apache.hadoop.fs.Path.initialize(Path.java:203)
        at org.apache.hadoop.fs.Path.<init>(Path.java:116)
        at org.apache.hadoop.fs.Path.<init>(Path.java:94)
        at 
org.apache.hadoop.hdfs.protocol.HdfsFileStatus.getFullPath(HdfsFileStatus.java:222)
        at 
org.apache.hadoop.hdfs.protocol.HdfsFileStatus.makeQualified(HdfsFileStatus.java:246)
        at 
org.apache.hadoop.hdfs.DistributedFileSystem.listStatusInternal(DistributedFileSystem.java:689)
        at 
org.apache.hadoop.hdfs.DistributedFileSystem.access$600(DistributedFileSystem.java:102)
        at 
org.apache.hadoop.hdfs.DistributedFileSystem$14.doCall(DistributedFileSystem.java:712)
        at 
org.apache.hadoop.hdfs.DistributedFileSystem$14.doCall(DistributedFileSystem.java:708)
        at 
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
        at 
org.apache.hadoop.hdfs.DistributedFileSystem.listStatus(DistributedFileSystem.java:708)
        at 
org.apache.hadoop.fs.shell.PathData.getDirectoryContents(PathData.java:268)
        at org.apache.hadoop.fs.shell.Command.recursePath(Command.java:347)
        at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:308)
        at org.apache.hadoop.fs.shell.Command.recursePath(Command.java:347)
        at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:308)
        at org.apache.hadoop.fs.shell.Command.recursePath(Command.java:347)
        at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:308)
        at org.apache.hadoop.fs.shell.Command.recursePath(Command.java:347)
        at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:308)
        at org.apache.hadoop.fs.shell.Command.recursePath(Command.java:347)
        at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:308)
        at 
org.apache.hadoop.fs.shell.Command.processPathArgument(Command.java:278)
        at org.apache.hadoop.fs.shell.Command.processArgument(Command.java:260)
        at org.apache.hadoop.fs.shell.Command.processArguments(Command.java:244)
        at 
org.apache.hadoop.fs.shell.SetReplication.processArguments(SetReplication.java:76)



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