diff --git a/db/update16.0.beta1.sql b/db/update16.0.beta1.sql
index 001bf88948..e71d9d859d 100644
--- a/db/update16.0.beta1.sql
+++ b/db/update16.0.beta1.sql
@@ -121,6 +121,7 @@ ALTER TABLE `zt_mr` ADD `synced` enum('0','1') COLLATE 'utf8_general_ci' NOT NUL
 ALTER TABLE `zt_mr` ADD `hasNoConflict` enum('0','1') COLLATE 'utf8_general_ci' NOT NULL DEFAULT '0';
 ALTER TABLE `zt_mr` ADD `diffs` longtext COLLATE 'utf8_general_ci' NULL AFTER `synced`;
 ALTER TABLE `zt_mr` ADD `removeSourceBranch` ENUM('0','1') NOT NULL DEFAULT '0' AFTER `compileStatus`;
+ALTER TABLE `zt_mr` ADD `syncError` VARCHAR(255) NOT NULL AFTER `synced`;
 
 ALTER TABLE zt_repo ADD `fileServerUrl` text COLLATE 'utf8_general_ci' NULL AFTER `job`;
 ALTER TABLE zt_repo ADD `fileServerAccount` varchar(40) NOT NULL default '' AFTER `fileServerUrl`;
diff --git a/db/zentao.sql b/db/zentao.sql
index 64b8292590..8d819b8877 100644
--- a/db/zentao.sql
+++ b/db/zentao.sql
@@ -849,6 +849,7 @@ CREATE TABLE IF NOT EXISTS `zt_mr` (
   `compileStatus` char(30) NOT NULL,
   `removeSourceBranch` enum('0','1') NOT NULL DEFAULT '0',
   `synced` enum('0','1') COLLATE 'utf8_general_ci' NOT NULL DEFAULT '1',
+  `syncError` varchar(255) NOT NULL,
   `hasNoConflict` enum('0','1') COLLATE 'utf8_general_ci' NOT NULL DEFAULT '0',
   `diffs` longtext COLLATE 'utf8_general_ci' NULL,
   PRIMARY KEY (`id`)
diff --git a/module/ci/model.php b/module/ci/model.php
index 2a5fcf2fae..64198ceaaf 100644
--- a/module/ci/model.php
+++ b/module/ci/model.php
@@ -57,7 +57,7 @@ class ciModel extends model
         /* Max retry times is: 3. */
         if($compile->times >= 3)
         {
-            $this->dao->update(TABLE_COMPILE)->set('status')->eq('failure')->where('id')->eq($compile->id)->exec();
+            $this->updateBuildStatus($compile, 'failure');
             return false;
         }
 
@@ -223,6 +223,33 @@ class ciModel extends model
 
             $rawMR = $this->loadModel('mr')->apiCreateMR($relateMR->gitlabID, $relateMR->sourceProject, $MRObject);
 
+            /**
+            * Another open merge request already exists for this source branch.
+            * The type of variable `$rawMR->message` is array.
+            */
+            if(isset($rawMR->message) and !isset($rawMR->iid))
+            {
+                foreach($this->lang->mr->apiErrorMap as $key => $errorMsg)
+                {
+                    if(strpos($errorMsg, '/') === 0)
+                    {
+                        $result = preg_match($errorMsg, $rawMR->message[0], $matches);
+                        if($result) $errorMessage = sprintf(zget($this->lang->mr->errorLang, $key), $matches[1]);
+                    }
+                    else
+                    {
+                        if($rawMR->message[0] == $errorMsg) $errorMessage = zget($this->lang->mr->errorLang, $key, $rawMR->message[0]);
+                    }
+
+                    if(isset($errorMessage)) break;
+                }
+                $newMR->syncError = sprintf($this->lang->mr->apiError->createMR, isset($errorMessage) ? $errorMessage : $rawMR->message[0]);
+            }
+            elseif(!isset($rawMR->iid))
+            {
+                $newMR->syncError = $this->lang->mr->createFailedFromAPI;
+            }
+
             if(!empty($rawMR->iid))
             {
                 $newMR->mriid  = $rawMR->iid;
diff --git a/module/job/model.php b/module/job/model.php
index fa08a254cd..97673d40cc 100644
--- a/module/job/model.php
+++ b/module/job/model.php
@@ -366,12 +366,12 @@ class jobModel extends model
     /**
      * Exec job.
      *
-     * @param  int    $id
-     * @param  object $reference
+     * @param  int   $id
+     * @param  array $extraParam
      * @access public
      * @return string|bool
      */
-    public function exec($id)
+    public function exec($id, $extraParam = array())
     {
         $job = $this->dao->select('t1.id,t1.name,t1.product,t1.repo,t1.server,t1.pipeline,t1.triggerType,t1.atTime,t1.customParam,t1.engine,t2.name as jenkinsName,t2.url,t2.account,t2.token,t2.password')
             ->from(TABLE_JOB)->alias('t1')
@@ -408,7 +408,7 @@ class jobModel extends model
         $this->dao->insert(TABLE_COMPILE)->data($build)->exec();
         $compileID = $this->dao->lastInsertId();
 
-        if($job->engine == 'jenkins') $compile = $this->execJenkinsPipeline($job, $repo, $compileID);
+        if($job->engine == 'jenkins') $compile = $this->execJenkinsPipeline($job, $repo, $compileID, $extraParam);
         if($job->engine == 'gitlab')  $compile = $this->execGitlabPipeline($job);
 
         $this->dao->update(TABLE_COMPILE)->data($compile)->where('id')->eq($compileID)->exec();
@@ -428,10 +428,11 @@ class jobModel extends model
      * @param  object    $job
      * @param  object    $repo
      * @param  int       $compileID
+     * @param  array     $extraParam
      * @access public
      * @return object
      */
-    public function execJenkinsPipeline($job, $repo, $compileID)
+    public function execJenkinsPipeline($job, $repo, $compileID, $extraParam = array())
     {
         $pipeline = new stdclass();
         $pipeline->PARAM_TAG   = '';
@@ -449,6 +450,11 @@ class jobModel extends model
             $pipeline->$paramName = $paramValue;
         }
 
+        foreach($extraParam as $paramName => $paramValue)
+        {
+            if(!isset($pipeline->$paramName)) $pipeline->$paramName = $paramValue;
+        }
+
         $url = $this->loadModel('compile')->getBuildUrl($job);
 
         $compile = new stdclass();
diff --git a/module/mr/model.php b/module/mr/model.php
index 342703d3f9..9cb3b4fc05 100644
--- a/module/mr/model.php
+++ b/module/mr/model.php
@@ -225,8 +225,12 @@ class mrModel extends model
         /* Exec Job */
         if($MR->hasNoConflict == '0' && $MR->mergeStatus == 'can_be_merged' && $MR->jobID)
         {
-            $MRID     = $this->dao->lastInsertId();
-            $pipeline = $this->loadModel('job')->exec($MR->jobID);
+            $MRID = $this->dao->lastInsertId();
+
+            $extraParam = array();
+            if(!empty($repo->fileServerUrl)) $extraParam = array('ZENTAO_REPOPATH' => $repo->fileServerUrl);
+
+            $pipeline = $this->loadModel('job')->exec($MR->jobID, $extraParam);
             $newMR    = new stdClass();
             if(!empty($pipeline->queue))
             {
diff --git a/module/mr/view/view.html.php b/module/mr/view/view.html.php
index 1e1c31c8c3..9c7259e463 100644
--- a/module/mr/view/view.html.php
+++ b/module/mr/view/view.html.php
@@ -62,7 +62,13 @@
                 <tbody>
                   <tr>
                     <th class="w-100px"><?php echo $lang->mr->status;?></th>
-                    <td><?php echo zget($lang->mr->statusList, $MR->status);?></td>
+                    <td>
+                    <?php if(!empty($MR->syncError) and $MR->synced === '0'):?>
+                      <span class="text-danger"><?php echo $MR->syncError;?></span>
+                    <?php else:?>
+                      <?php echo zget($lang->mr->statusList, $MR->status);?>
+                    <?php endif;?>
+                    </td>
                   </tr>
                   <tr>
                     <th><?php echo $lang->mr->mergeStatus; ?></th>
@@ -72,7 +78,7 @@
                       <?php if($MR->synced) echo '<code>' . $lang->mr->noChanges . '</code>';?>
                     </td>
                     <?php else:?>
-                    <td><?php echo zget($lang->mr->mergeStatusList, $rawMR->merge_status);?></td>
+                    <td><?php echo zget($lang->mr->mergeStatusList, !empty($rawMR->merge_status) ? $rawMR->merge_status : $MR->mergeStatus);?></td>
                     <?php endif;?>
                    </tr>
                    <tr>