From 331d847bfea68cb25564d59c5722108fb97f5447 Mon Sep 17 00:00:00 2001
From: Nicole00 <anqi.wang@vesoft.com>
Date: Fri, 17 Dec 2021 13:59:33 +0800
Subject: [PATCH] release the transport when version verification failed

---
 .../com/vesoft/nebula/client/graph/net/SyncConnection.java     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/client/src/main/java/com/vesoft/nebula/client/graph/net/SyncConnection.java b/client/src/main/java/com/vesoft/nebula/client/graph/net/SyncConnection.java
index 07e625aae..4216e684c 100644
--- a/client/src/main/java/com/vesoft/nebula/client/graph/net/SyncConnection.java
+++ b/client/src/main/java/com/vesoft/nebula/client/graph/net/SyncConnection.java
@@ -78,6 +78,7 @@ public void open(HostAddress address, int timeout, SSLParam sslParam)
                         Charsets.UTF_8));
             }
         } catch (TException | IOException e) {
+            close();
             throw new IOErrorException(IOErrorException.E_UNKNOWN, e.getMessage());
         }
     }
@@ -224,7 +225,7 @@ public boolean ping() {
     }
 
     public void close() {
-        if (transport != null) {
+        if (transport != null && transport.isOpen()) {
             transport.close();
         }
     }