From 9d37bb87b75b4f0c584cf2cdbf97a5df3cdc22a2 Mon Sep 17 00:00:00 2001
From: "jianghang.loujh" <jianghang.loujh@alibaba-inc.com>
Date: Thu, 1 Sep 2022 13:31:01 +0800
Subject: [PATCH] fixed issue #4243 , support auto register for cluster = null

---
 .../canal/instance/manager/plain/PlainCanalConfigClient.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/instance/manager/src/main/java/com/alibaba/otter/canal/instance/manager/plain/PlainCanalConfigClient.java b/instance/manager/src/main/java/com/alibaba/otter/canal/instance/manager/plain/PlainCanalConfigClient.java
index 583091ed..f8fb4355 100644
--- a/instance/manager/src/main/java/com/alibaba/otter/canal/instance/manager/plain/PlainCanalConfigClient.java
+++ b/instance/manager/src/main/java/com/alibaba/otter/canal/instance/manager/plain/PlainCanalConfigClient.java
@@ -74,7 +74,7 @@ public class PlainCanalConfigClient extends AbstractCanalLifeCycle implements Ca
             md5 = "";
         }
         String url = configURL + "/api/v1/config/server_polling?ip=" + localIp + "&port=" + adminPort + "&md5=" + md5
-                     + "&register=" + (autoRegister ? 1 : 0) + "&cluster=" + autoCluster + "&name=" + name;
+                     + "&register=" + (autoRegister ? 1 : 0) + "&cluster=" + StringUtils.stripToEmpty(autoCluster) + "&name=" + StringUtils.stripToEmpty(name);
         return queryConfig(url);
     }