yihua commented on code in PR #11919:
URL: https://github.com/apache/hudi/pull/11919#discussion_r1751014920


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hudi-utilities/src/main/java/org/apache/hudi/utilities/streamer/StreamSync.java:
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@@ -1037,6 +1037,11 @@ public void runMetaSync() {
 
       Map<String, HoodieException> failedMetaSyncs = new HashMap<>();
       for (String impl : syncClientToolClasses) {
+        if (impl.trim().isEmpty()) {
+          LOG.warn("Cannot run MetaSync with empty class name");

Review Comment:
   Let's add a small test case so that the test fails before the fix and passes 
after the fix.  Do you need to fix other places?  Also seems like this change 
is already in #11915?



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