From a133debb52282f1a392dae9c6b83555b901f29ce Mon Sep 17 00:00:00 2001
From: "chenyangyang.cy" <chenyangyang.cy@alibaba-inc.com>
Date: Wed, 16 Aug 2023 13:35:39 +0800
Subject: [PATCH] Handle ErrCompacted errors for Compact in raftexample

---
 contrib/raftexample/raft.go | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/contrib/raftexample/raft.go b/contrib/raftexample/raft.go
index 14f1aca80821..0373ea789544 100644
--- a/contrib/raftexample/raft.go
+++ b/contrib/raftexample/raft.go
@@ -392,10 +392,13 @@ func (rc *raftNode) maybeTriggerSnapshot(applyDoneC <-chan struct{}) {
 		compactIndex = rc.appliedIndex - snapshotCatchUpEntriesN
 	}
 	if err := rc.raftStorage.Compact(compactIndex); err != nil {
-		panic(err)
+		if err != raft.ErrCompacted {
+			panic(err)
+		}
+	} else {
+		log.Printf("compacted log at index %d", compactIndex)
 	}
-
-	log.Printf("compacted log at index %d", compactIndex)
+	
 	rc.snapshotIndex = rc.appliedIndex
 }