[dubbo] branch 2.6.x updated: user can custom registry cluster (#5601)

[liujun]

This is an automated email from the ASF dual-hosted git repository.

liujun pushed a commit to branch 2.6.x
in repository https://gitbox.apache.org/repos/asf/dubbo.git


The following commit(s) were added to refs/heads/2.6.x by this push:
     new a8f6f99  user can custom registry cluster (#5601)
a8f6f99 is described below

commit a8f6f99e434cb69f6cb343d38665c38bbbf6ba1d
Author: bruce <841326...@qq.com>
AuthorDate: Fri Jan 17 17:43:34 2020 +0800

    user can custom registry cluster (#5601)
---
 .../src/main/java/com/alibaba/dubbo/config/ReferenceConfig.java         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git 
a/dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ReferenceConfig.java
 
b/dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ReferenceConfig.java
index adcff42..9a9226f 100644
--- 
a/dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ReferenceConfig.java
+++ 
b/dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ReferenceConfig.java
@@ -405,7 +405,7 @@ public class ReferenceConfig<T> extends 
AbstractReferenceConfig {
                 }
                 if (registryURL != null) { // registry url is available
                     // use AvailableCluster only when register's cluster is 
available
-                    URL u = registryURL.addParameter(Constants.CLUSTER_KEY, 
AvailableCluster.NAME);
+                    URL u = 
registryURL.addParameterIfAbsent(Constants.CLUSTER_KEY, AvailableCluster.NAME);
                     invoker = cluster.join(new StaticDirectory(u, invokers));
                 } else { // not a registry url
                     invoker = cluster.join(new StaticDirectory(invokers));