codope commented on code in PR #10804:
URL: https://github.com/apache/hudi/pull/10804#discussion_r1510616751


##########
hudi-spark-datasource/hudi-spark-common/src/main/java/org/apache/hudi/HoodieSparkFunctionalIndexClient.java:
##########
@@ -122,11 +124,25 @@ private static boolean indexExists(HoodieTableMetaClient 
metaClient, String inde
   private static Map<String, String> buildWriteConfig(HoodieTableMetaClient 
metaClient, HoodieFunctionalIndexDefinition indexDefinition) {
     Map<String, String> writeConfig = new HashMap<>();
     if (metaClient.getTableConfig().isMetadataTableAvailable()) {
-      if 
(!writeConfig.containsKey(HoodieLockConfig.LOCK_PROVIDER_CLASS_NAME.key())) {
-        writeConfig.put(HoodieWriteConfig.WRITE_CONCURRENCY_MODE.key(), 
WriteConcurrencyMode.OPTIMISTIC_CONCURRENCY_CONTROL.name());
-        
writeConfig.putAll(JavaConverters.mapAsJavaMapConverter(HoodieCLIUtils.getLockOptions(metaClient.getBasePathV2().toString())).asJava());
-      }
+      writeConfig.put(HoodieWriteConfig.WRITE_CONCURRENCY_MODE.key(), 
WriteConcurrencyMode.OPTIMISTIC_CONCURRENCY_CONTROL.name());
+      
writeConfig.putAll(JavaConverters.mapAsJavaMapConverter(HoodieCLIUtils.getLockOptions(metaClient.getBasePathV2().toString())).asJava());
+
+      // [HUDI-7472] Ensure write-config contains the existing MDT partition 
to prevent those from getting deleted
+      
metaClient.getTableConfig().getMetadataPartitions().forEach(partitionPath -> {

Review Comment:
   Good catch!



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