From 1e590d787fb48b1b9ab596847acd1a6f2d525f58 Mon Sep 17 00:00:00 2001
From: congqixia <congqi.xia@zilliz.com>
Date: Thu, 27 Oct 2022 19:15:32 +0800
Subject: [PATCH] Release last version after expiration (#20137)

Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>

Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
---
 internal/querynode/shard_cluster_version.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/internal/querynode/shard_cluster_version.go b/internal/querynode/shard_cluster_version.go
index 0cded83e3a..f76930cf66 100644
--- a/internal/querynode/shard_cluster_version.go
+++ b/internal/querynode/shard_cluster_version.go
@@ -117,6 +117,8 @@ func (v *ShardClusterVersion) checkSafeGC() {
 				if v.lastVersion != nil {
 					<-v.lastVersion.Expire()
 				}
+				// release the reference of last version, so it could be processed by gc
+				v.lastVersion = nil
 				close(v.ch)
 			}()
 		})