n3nash commented on a change in pull request #2374:
URL: https://github.com/apache/hudi/pull/2374#discussion_r550972084



##########
File path: 
hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/AbstractHoodieWriteClient.java
##########
@@ -821,6 +865,38 @@ protected void finalizeWrite(HoodieTable<T, I, K, O> 
table, String instantTime,
     }
   }
 
+  private HoodieCommitMetadata resolveWriteConflictIfAny(HoodieTable<T, I, K, 
O> table, final String instantTime,
+                                            HoodieCommitMetadata 
thisCommitMetadata) {
+    Long currentTimeInSecs = System.currentTimeMillis() / 1000;
+    ConflictResolutionStrategy resolutionStrategy = 
config.getWriteConflictResolutionStrategy();
+    Option<HoodieInstant> lastCompletedInstantBeforeWriterStarted = 
this.latestWriteInstantCompletedBeforeWriter.get();
+    String lastInstantTimestamp = 
lastCompletedInstantBeforeWriterStarted.isPresent()
+        ? lastCompletedInstantBeforeWriterStarted.get().getTimestamp() : "0";
+    Stream<HoodieInstant> instantStream = table.getActiveTimeline()
+        .getAllCommitsTimeline()
+        .getCommitsAndCompactionTimeline()
+        .filterCompletedInstants()
+        .findInstantsInRange(lastInstantTimestamp, 
String.valueOf(currentTimeInSecs))
+        .getInstants();
+
+    LOG.info("Current eligible instants during write oHoodieWriteConfigf 
instant " + instantTime + " = "
+        + instantStream.collect(Collectors.toList()));
+
+    boolean hasConflict = instantStream.anyMatch(instant -> {
+      try {
+        return resolutionStrategy.hasConflict(thisCommitMetadata, 
HoodieCommitMetadata.fromBytes(
+            table.getActiveTimeline().getInstantDetails(instant).get(), 
HoodieCommitMetadata.class));
+      } catch (IOException io) {
+        throw new HoodieCommitException("Unable to determine if conflict 
exists", io);
+      }
+    });
+    HoodieCommitMetadata newMetadataAfterConflictResolution = 
thisCommitMetadata;
+    if (hasConflict) {
+      newMetadataAfterConflictResolution = 
resolutionStrategy.resolveConflict(config, hadoopConf);

Review comment:
       Done




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