Fix a wrong check about entity if GraphQL at the endpoint relation level. (#8218)

CHANGES.md

@@ -63,6 +63,7 @@ Release Notes.
 * Add customized envoy ALS protocol receiver for satellite transmit batch data.
 * Remove `logback` dependencies in IoTDB plugin.
 * Fix `StorageModuleElasticsearchProvider` doesn't watch on `trustStorePath`.
+* Fix a wrong check about entity if GraphQL at the endpoint relation level.
 
 #### UI
 

oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/input/Entity.java

@@ -89,7 +89,7 @@ public class Entity {
                     && Objects.nonNull(serviceInstanceName) && Objects.nonNull(destServiceInstanceName)
                     && Objects.nonNull(normal) && Objects.nonNull(destNormal);
             case EndpointRelation:
-                return Objects.nonNull(serviceName) && Objects.nonNull(endpointName)
+                return Objects.nonNull(serviceName) && Objects.nonNull(destServiceName)
                     && Objects.nonNull(endpointName) && Objects.nonNull(destEndpointName)
                     && Objects.nonNull(normal) && Objects.nonNull(destNormal);
             default: