[GitHub] [hudi] codope commented on a change in pull request #4118: [HUDI-2774] Handle duplicate instants while fetching pending clustering plans

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codope commented on a change in pull request #4118:
URL: https://github.com/apache/hudi/pull/4118#discussion_r836790799



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File path: hudi-common/src/main/java/org/apache/hudi/common/util/ClusteringUtils.java
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@@ -124,7 +125,16 @@
         // get all filegroups in the plan
         getFileGroupEntriesInClusteringPlan(clusteringPlan.getLeft(), clusteringPlan.getRight()));
 
-    Map<HoodieFileGroupId, HoodieInstant> resultMap = resultStream.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
+    Map<HoodieFileGroupId, HoodieInstant> resultMap;
+    try {
+      resultMap = resultStream.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
+    } catch (Exception e) {
+      if (e instanceof IllegalStateException && e.getMessage().contains("Duplicate key")) {
+        throw new HoodieException("Found duplicate file groups pending clustering. If you're running deltastreamer in continuous mode, consider adding delay using --min-sync-interval-seconds. "

Review comment:
       with OCC mode and in process lock provider, we should not hit this exception.




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