Victsm commented on a change in pull request #33613:
URL: https://github.com/apache/spark/pull/33613#discussion_r681859197



##########
File path: 
common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/ErrorHandler.java
##########
@@ -105,16 +105,16 @@ public boolean shouldRetryError(Throwable t) {
         return false;
       }
 
-      String errorStackTrace = Throwables.getStackTraceAsString(t);
       // If the block is too late or stale block push, there is no need to 
retry it
-      return 
!errorStackTrace.contains(TOO_LATE_OR_STALE_BLOCK_PUSH_MESSAGE_SUFFIX);
+      String msg = t.getMessage();
+      return !(msg != null && 
msg.contains(TOO_LATE_OR_STALE_BLOCK_PUSH_MESSAGE_SUFFIX));

Review comment:
       Well, it is not really a protocol change.
   We are just switching from RPCFailure to RPCResponse using a non-empty 
ByteBuffer.




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