diff --git a/web/pgadmin/browser/server_groups/servers/__init__.py b/web/pgadmin/browser/server_groups/servers/__init__.py
index fecb66d..41eb429 100644
--- a/web/pgadmin/browser/server_groups/servers/__init__.py
+++ b/web/pgadmin/browser/server_groups/servers/__init__.py
@@ -500,7 +500,7 @@ class ServerNode(PGChildNodeView):
         if 'db_res' in data:
             data['db_res'] = ','.join(data['db_res'])
 
-        if 'hostaddr' in data and data['hostaddr'] != '':
+        if 'hostaddr' in data and data['hostaddr'] and data['hostaddr'] != '':
             if not self.pat4.match(data['hostaddr']):
                 if not self.pat6.match(data['hostaddr']):
                     return make_json_response(
@@ -700,7 +700,7 @@ class ServerNode(PGChildNodeView):
                     )
                 )
 
-        if 'hostaddr' in data and data['hostaddr'] != '':
+        if 'hostaddr' in data and data['hostaddr'] and data['hostaddr'] != '':
             if not self.pat4.match(data['hostaddr']):
                 if not self.pat6.match(data['hostaddr']):
                     return make_json_response(
diff --git a/web/pgadmin/static/js/browser/server_groups/servers/model_validation.js b/web/pgadmin/static/js/browser/server_groups/servers/model_validation.js
index 948af3d..f1627aa 100644
--- a/web/pgadmin/static/js/browser/server_groups/servers/model_validation.js
+++ b/web/pgadmin/static/js/browser/server_groups/servers/model_validation.js
@@ -31,6 +31,8 @@ export class ModelValidation {
     this.checkForEmpty('name', gettext('Name must be specified.'));
 
     if (ModelValidation.isEmptyString(serviceId)) {
+      // Do not sent empty string
+      this.setNullValueForEmptyString('service');
       this.checkHostAndHostAddress();
 
       this.checkForEmpty('db', gettext('Maintenance database must be specified.'));
@@ -50,8 +52,20 @@ export class ModelValidation {
     return null;
   }
 
+  setNullValueForEmptyString(field) {
+    let val = this.model.get(field);
+    if (_.isUndefined(val) || _.isNull(val))
+      return;
+
+    // To avoid passing empty string to connection parameter
+    if(String(val).trim() === '') {
+      this.model.set(field, null);
+    }
+  }
+
   clearHostAddressAndDbErrors() {
     _.each(['host', 'hostaddr', 'db'], (item) => {
+      this.setNullValueForEmptyString(item);
       this.model.errorModel.unset(item);
     });
   }
diff --git a/web/regression/javascript/browser/server_groups/servers/model_validation_spec.js b/web/regression/javascript/browser/server_groups/servers/model_validation_spec.js
index 560d8b6..85e51eb 100644
--- a/web/regression/javascript/browser/server_groups/servers/model_validation_spec.js
+++ b/web/regression/javascript/browser/server_groups/servers/model_validation_spec.js
@@ -20,6 +20,9 @@ describe('Server#ModelValidation', () => {
         get: function (key) {
           return this.allValues[key];
         },
+        set: function (key, value) {
+          this.key = value;
+        },
         sessAttrs: {},
       };
       model.isNew = jasmine.createSpy('isNew');
@@ -51,6 +54,20 @@ describe('Server#ModelValidation', () => {
           expect(model.errorModel.set).toHaveBeenCalledWith({});
         });
       });
+
+      describe('Service id present', () => {
+        it('sets empty service name which should throw an error', () => {
+          model.allValues['service'] = '';
+          expect(modelValidation.validate()).toBe('Either Host name, Address or Service must be specified.');
+          expect(model.errorModel.set).toHaveBeenCalledWith({
+            host: 'Either Host name, Address or Service must be specified.',
+            hostaddr: 'Either Host name, Address or Service must be specified.',
+            db: 'Maintenance database must be specified.'
+          });
+        });
+      });
+
+
     });
 
     describe('When no parameters are valid', () => {