[Segment Replication] Log diff.different files for debuggability (#6049…

…) (#6051)

* [Segment Replication] Log diff.different files



* Remove unnecessary conversion



* Spotless fix



---------


(cherry picked from commit 8d4bbef)

Signed-off-by: Suraj Singh <surajrider@gmail.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

server/src/main/java/org/opensearch/indices/replication/SegmentReplicationTarget.java

@@ -183,8 +183,11 @@ private void getFiles(CheckpointInfoResponse checkpointInfo, StepListener<GetSeg
         if (diff.different.isEmpty() == false) {
             getFilesListener.onFailure(
                 new IllegalStateException(
-                    new ParameterizedMessage("Shard {} has local copies of segments that differ from the primary", indexShard.shardId())
-                        .getFormattedMessage()
+                    new ParameterizedMessage(
+                        "Shard {} has local copies of segments that differ from the primary {}",
+                        indexShard.shardId(),
+                        diff.different
+                    ).getFormattedMessage()
                 )
             );
         }