afterincomparableyum commented on code in PR #3583:
URL: https://github.com/apache/celeborn/pull/3583#discussion_r2813521705


##########
cpp/celeborn/client/reader/CelebornInputStream.cpp:
##########
@@ -189,9 +205,58 @@ void CelebornInputStream::moveToNextReader() {
 
 std::shared_ptr<PartitionReader> CelebornInputStream::createReaderWithRetry(
     const protocol::PartitionLocation& location) {
-  // TODO: support retrying when createReader failed. Maybe switch to peer
-  // location?
-  return createReader(location);
+  const protocol::PartitionLocation* currentLocation = &location;
+  std::exception_ptr lastException;
+

Review Comment:
   good suggestion, I will add targeted tests



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