walterddr commented on code in PR #12338:
URL: https://github.com/apache/pinot/pull/12338#discussion_r1480163071


##########
pinot-broker/src/main/java/org/apache/pinot/broker/api/resources/PinotClientRequest.java:
##########
@@ -348,4 +349,25 @@ private static HttpRequesterIdentity 
makeHttpIdentity(org.glassfish.grizzly.http
 
     return identity;
   }
+
+  /**
+   * Generate Response object from the BrokerResponse object with 
'X-Pinot-Error-Code' header value
+   * @param brokerResponse
+   * @return Response
+   * @throws Exception
+   */
+  private static Response getPinotQueryResponse(BrokerResponse brokerResponse)
+      throws Exception {
+    int headerValue = -1; // default value of the header.
+
+    if (brokerResponse.getExceptionsSize() != 0) {
+      // set the header value as first exception error code value.
+      headerValue = 
brokerResponse.getProcessingExceptions().get(0).getErrorCode();
+    }
+
+    // returning the Response with OK status and header value.
+    return Response.ok()
+        .header(PINOT_QUERY_ERROR_CODE_HEADER, headerValue)

Review Comment:
   was referring to the handling of these numbers:
   
https://github.com/apache/pinot/blob/9314c116adf0330a3c4b38d722f53a857a618add/pinot-common/src/main/java/org/apache/pinot/common/exception/QueryException.java#L49
   
   for example at the bottom there's client error. was wondering if we want to 
differentiate with query error code header between client/broker/server error



##########
pinot-broker/src/main/java/org/apache/pinot/broker/api/resources/PinotClientRequest.java:
##########
@@ -348,4 +349,25 @@ private static HttpRequesterIdentity 
makeHttpIdentity(org.glassfish.grizzly.http
 
     return identity;
   }
+
+  /**
+   * Generate Response object from the BrokerResponse object with 
'X-Pinot-Error-Code' header value
+   * @param brokerResponse
+   * @return Response
+   * @throws Exception
+   */
+  private static Response getPinotQueryResponse(BrokerResponse brokerResponse)
+      throws Exception {
+    int headerValue = -1; // default value of the header.
+
+    if (brokerResponse.getExceptionsSize() != 0) {
+      // set the header value as first exception error code value.
+      headerValue = 
brokerResponse.getProcessingExceptions().get(0).getErrorCode();
+    }
+
+    // returning the Response with OK status and header value.
+    return Response.ok()
+        .header(PINOT_QUERY_ERROR_CODE_HEADER, headerValue)

Review Comment:
   was referring to the handling of these numbers:
   
https://github.com/apache/pinot/blob/9314c116adf0330a3c4b38d722f53a857a618add/pinot-common/src/main/java/org/apache/pinot/common/exception/QueryException.java#L49
   
   for example at the bottom there's client error. was wondering if we want to 
differentiate with query error code header key between client/broker/server 
error



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