[jira] [Created] (HDFS-12614) FSPermissionChecker#getINodeAttrs() throws NPE when INodeAttributesProvider configured

["Manoj Govindassamy (JIRA)" <ji...@apache.org>]

Manoj Govindassamy created HDFS-12614:
-----------------------------------------

             Summary: FSPermissionChecker#getINodeAttrs() throws NPE when INodeAttributesProvider configured
                 Key: HDFS-12614
                 URL: https://issues.apache.org/jira/browse/HDFS-12614
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Manoj Govindassamy
            Assignee: Manoj Govindassamy


When INodeAttributesProvider is configured, and when resolving path (like "/") and checking for permission, the following code when working on {{pathByNameArr}} throws NullPointerException. 

{noformat}
  private INodeAttributes getINodeAttrs(byte[][] pathByNameArr, int pathIdx,
      INode inode, int snapshotId) {
    INodeAttributes inodeAttrs = inode.getSnapshotINode(snapshotId);
    if (getAttributesProvider() != null) {
      String[] elements = new String[pathIdx + 1];
      for (int i = 0; i < elements.length; i++) {
        elements[i] = DFSUtil.bytes2String(pathByNameArr[i]);  <===
      }
      inodeAttrs = getAttributesProvider().getAttributes(elements, inodeAttrs);
    }
    return inodeAttrs;
  }
{noformat}

Looks like for paths like "/" where the split components based on delimiter "/" can be null, the pathByNameArr array can have null elements and can throw NPE.



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