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  1. Hadoop HDFS
  2. HDFS-5513

CacheAdmin commands fail when using . as the path

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Details

    • Bug
    • Status: Closed
    • Minor
    • Resolution: Fixed
    • 3.0.0-alpha1
    • 2.3.0
    • caching, tools
    • None

    Description

      The hdfs CLI commands generally accept "." as a path argument.
      e.g.

      hdfs dfs -rm .
      hdfs dfsadmin -allowSnapshot .
      

      I don't think it's very common to use the path "." but the CacheAdmin commands will fail saying that it cannot create a Path from an empty string.

      [schu@hdfs-c5-nfs ~]$ hdfs cacheadmin -removeDirectives -path .
      Exception in thread "main" java.lang.IllegalArgumentException: Can not create a Path from an empty string
      	at org.apache.hadoop.fs.Path.checkPathArg(Path.java:127)
      	at org.apache.hadoop.fs.Path.<init>(Path.java:184)
      	at org.apache.hadoop.hdfs.protocol.PathBasedCacheDirective$Builder.<init>(PathBasedCacheDirective.java:66)
      	at org.apache.hadoop.hdfs.DistributedFileSystem.listPathBasedCacheDirectives(DistributedFileSystem.java:1639)
      	at org.apache.hadoop.hdfs.tools.CacheAdmin$RemovePathBasedCacheDirectivesCommand.run(CacheAdmin.java:365)
      	at org.apache.hadoop.hdfs.tools.CacheAdmin.run(CacheAdmin.java:82)
      	at org.apache.hadoop.hdfs.tools.CacheAdmin.main(CacheAdmin.java:87)
      [schu@hdfs-c5-nfs ~]$ hdfs cacheadmin -addDirective -path . -pool schu
      Exception in thread "main" java.lang.IllegalArgumentException: Can not create a Path from an empty string
      	at org.apache.hadoop.fs.Path.checkPathArg(Path.java:127)
      	at org.apache.hadoop.fs.Path.<init>(Path.java:184)
      	at org.apache.hadoop.hdfs.protocol.PathBasedCacheDirective$Builder.<init>(PathBasedCacheDirective.java:66)
      	at org.apache.hadoop.hdfs.DistributedFileSystem.addPathBasedCacheDirective(DistributedFileSystem.java:1598)
      	at org.apache.hadoop.hdfs.tools.CacheAdmin$AddPathBasedCacheDirectiveCommand.run(CacheAdmin.java:180)
      	at org.apache.hadoop.hdfs.tools.CacheAdmin.run(CacheAdmin.java:82)
      	at org.apache.hadoop.hdfs.tools.CacheAdmin.main(CacheAdmin.java:87)
      

      Attachments

        1. hdfs-5513-3.patch
          3 kB
          Andrew Wang
        2. hdfs-5513-2.patch
          4 kB
          Andrew Wang
        3. hdfs-5513-1.patch
          4 kB
          Andrew Wang

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            andrew.wang Andrew Wang
            schu Stephen Chu
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              Created:
              Updated:
              Resolved:

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