Github user joshelser commented on a diff in the pull request:

    https://github.com/apache/phoenix/pull/265#discussion_r124402049
  
    --- Diff: 
phoenix-queryserver/src/main/java/org/apache/phoenix/queryserver/server/QueryServer.java
 ---
    @@ -273,6 +282,54 @@ public int run(String[] args) throws Exception {
         }
       }
     
    +  // add remoteUserExtractor to builder if enabled
    +  @VisibleForTesting
    +  public void setRemoteUserExtractorIfNecessary(HttpServer.Builder 
builder, Configuration conf) {
    +    if 
(conf.getBoolean(QueryServices.QUERY_SERVER_WITH_REMOTEUSEREXTRACTOR_ATTRIB,
    +            
QueryServicesOptions.DEFAULT_QUERY_SERVER_WITH_REMOTEUSEREXTRACTOR)) {
    +      builder.withRemoteUserExtractor(new 
PhoenixRemoteUserExtractor(conf));
    +    }
    +  }
    +
    +  /**
    +   * Use the correctly way to extract end user.
    +   */
    +
    +  static class PhoenixRemoteUserExtractor implements RemoteUserExtractor{
    +    private final HttpQueryStringParameterRemoteUserExtractor 
paramRemoteUserExtractor;
    +    private final HttpRequestRemoteUserExtractor 
requestRemoteUserExtractor;
    +    private final String userExtractParam;
    +
    +    public PhoenixRemoteUserExtractor(Configuration conf) {
    +      this.requestRemoteUserExtractor = new 
HttpRequestRemoteUserExtractor();
    +      this.userExtractParam = 
conf.get(QueryServices.QUERY_SERVER_REMOTEUSEREXTRACTOR_PARAM,
    +              
QueryServicesOptions.DEFAULT_QUERY_SERVER_REMOTEUSEREXTRACTOR_PARAM);
    +      this.paramRemoteUserExtractor = new 
HttpQueryStringParameterRemoteUserExtractor(userExtractParam);
    +    }
    +
    +    @Override
    +    public String extract(HttpServletRequest request) throws 
RemoteUserExtractionException {
    +      if (request.getParameter(userExtractParam) != null) {
    --- End diff --
    
    We should put a `requestRemoteUserExtractor.extract(request)` at the top of 
this method implementation. We should be using it in both branches of the 
conditional (replacing the `request.getRemoteUser()` call you have below)


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