bugfix: remove dubbo PRC communication xid transmission. (#4023)

changes/1.5.0.md

@@ -62,6 +62,7 @@ Seata 是一款开源的分布式事务解决方案，提供高性能和简单
   - [[#3976](https://github.com/seata/seata/pull/3976)] 修复 future timeout 引发的 NPE 问题
   - [[#3998](https://github.com/seata/seata/pull/3998)] 修复 jedis multi.exec 的 NPE 问题
   - [[#4011](https://github.com/seata/seata/pull/4011)] 修复 springboot下无法获取distributed-lock-table配置
+  - [[#4023](https://github.com/seata/seata/pull/4023)] 修复 dubbo部分场景存在xid未清除的问题
 
 
 ### optimize：

changes/en-us/1.5.0.md

@@ -60,6 +60,7 @@
   - [[#3988](https://github.com/seata/seata/pull/3988)] fix the problem that nacos not found user when password has special characters
   - [[#3998](https://github.com/seata/seata/pull/3998)] fix the NPE of jedis multi.exec
   - [[#4011](https://github.com/seata/seata/pull/4011)] fix can not get properties of distributed-lock-table in springboot
+  - [[#4023](https://github.com/seata/seata/pull/4023)] fix the problem that the xid is not cleared in some scenes of dubbo
 
 
    ### optimize：

integration/dubbo-alibaba/src/main/java/io/seata/integration/dubbo/alibaba/AlibabaDubboTransactionPropagationFilter.java

@@ -93,6 +93,10 @@ public class AlibabaDubboTransactionPropagationFilter implements Filter {
                     }
                 }
             }
+            RpcContext.getContext().removeAttachment(RootContext.KEY_XID);
+            RpcContext.getContext().removeAttachment(RootContext.KEY_BRANCH_TYPE);
+            RpcContext.getServerContext().removeAttachment(RootContext.KEY_XID);
+            RpcContext.getServerContext().removeAttachment(RootContext.KEY_BRANCH_TYPE);
         }
     }
 

integration/dubbo/src/main/java/io/seata/integration/dubbo/ApacheDubboTransactionPropagationFilter.java

@@ -90,6 +90,10 @@ public class ApacheDubboTransactionPropagationFilter implements Filter {
                     }
                 }
             }
+            RpcContext.getContext().removeAttachment(RootContext.KEY_XID);
+            RpcContext.getContext().removeAttachment(RootContext.KEY_BRANCH_TYPE);
+            RpcContext.getServerContext().removeAttachment(RootContext.KEY_XID);
+            RpcContext.getServerContext().removeAttachment(RootContext.KEY_BRANCH_TYPE);
         }
     }