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From "Koji Noguchi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1866) distcp requires large heapsize when copying many files
Date Mon, 10 Sep 2007 16:37:29 GMT
distcp requires large heapsize when copying many files
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                 Key: HADOOP-1866
                 URL: https://issues.apache.org/jira/browse/HADOOP-1866
             Project: Hadoop
          Issue Type: Bug
          Components: util
            Reporter: Koji Noguchi
            Priority: Minor


Trying to distcp 1.5 million files with 1G client heapsize,  failed with outofmemory.


Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit
exceeded
       at java.util.regex.Pattern.compile(Pattern.java:1438)
       at java.util.regex.Pattern.<init>(Pattern.java:1130)
       at java.util.regex.Pattern.compile(Pattern.java:846)
       at java.lang.String.replace(String.java:2208)
       at org.apache.hadoop.fs.Path.normalizePath(Path.java:147)
       at org.apache.hadoop.fs.Path.initialize(Path.java:137)
       at org.apache.hadoop.fs.Path.<init>(Path.java:126)
       at org.apache.hadoop.dfs.DfsPath.<init>(DfsPath.java:32)
       at org.apache.hadoop.dfs.DistributedFileSystem$RawDistributedFileSystem.listPaths(DistributedFileSystem.java:214)
       at org.apache.hadoop.fs.FileSystem.listPaths(FileSystem.java:483)
       at org.apache.hadoop.fs.FileSystem.listPaths(FileSystem.java:496)
       at org.apache.hadoop.fs.ChecksumFileSystem.listPaths(ChecksumFileSystem.java:539)
       at org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.setup(CopyFiles.java:327)
       at org.apache.hadoop.util.CopyFiles.copy(CopyFiles.java:762)
       at org.apache.hadoop.util.CopyFiles.run(CopyFiles.java:808)
       at org.apache.hadoop.util.ToolBase.doMain(ToolBase.java:189)
       at org.apache.hadoop.util.CopyFiles.main(CopyFiles.java:818)

It would be nice if distcp doesn't require gigs of heapsize when copying large amount of files.




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