steveloughran commented on pull request #2530:
URL: https://github.com/apache/hadoop/pull/2530#issuecomment-740865126


   Latest iteration is something viable to be merged in: All HTTP headers are 
returned as xattrs
   
   * New HeaderProcessing store operation to isolate this
   * ContextAccessors adds call to getObjectMetadata
   * the various FS getXattr* calls all delegate to HeaderProcessing
   * the returned header list contains all user headers
   * and the standard HTTP ones.
   
   Tests for all of this
   * unit tests for HeaderProcessing
   * etag propagation in ITestMiscOperations
   * And something to query/log that getXAttr(/) is sensible
   * commit tests verify the attribute is set
   
   This patch doesn't play games with getFileStatus and provides information
   (access to headers) which is more broadly useful.
   
   The setXAttr calls aren't supported: they are immutable. 
   
   testing: in progress.


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