getConetentSummary() for HarFileSystem throws IllegalArgumentException
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                 Key: MAPREDUCE-1877
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1877
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: harchive
    Affects Versions: 0.22.0
            Reporter: Paul Yang


As HarFileSystem does not implement getContentSummary(), the implementation from FilterFileSystem is inherited by default. However, FilterFileSystem.getContentSummary() does not work for the HarFileSystem because the method attempts to use HarFileSystem's underlying FS to call getContentSummary(). In the case where the the underlying filesystem is HDFS, an exception similar to the following is thrown:

{code}
java.lang.IllegalArgumentException: Wrong FS: har://hdfs-example.com:9000/tmp/data.har, expected: hdfs://example.com:9000
        at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:352)
        at org.apache.hadoop.hdfs.DistributedFileSystem.checkPath(DistributedFileSystem.java:99)
        at org.apache.hadoop.hdfs.DistributedFileSystem.getPathName(DistributedFileSystem.java:155)
        at org.apache.hadoop.hdfs.DistributedFileSystem.getContentSummary(DistributedFileSystem.java:232)
        at org.apache.hadoop.fs.FilterFileSystem.getContentSummary(FilterFileSystem.java:287)
        at org.apache.hadoop.fs.FilterFileSystem.getContentSummary(FilterFileSystem.java:287)
{code}

One solution is to implement HarFileSystem.getContentSummary() using code similar to FileSystem.getContentSummary().


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