diff --git a/portal/src/main/java/org/zstack/portal/managementnode/ManagementNodeManagerImpl.java b/portal/src/main/java/org/zstack/portal/managementnode/ManagementNodeManagerImpl.java
index 88bef7d8302..90015f47915 100755
--- a/portal/src/main/java/org/zstack/portal/managementnode/ManagementNodeManagerImpl.java
+++ b/portal/src/main/java/org/zstack/portal/managementnode/ManagementNodeManagerImpl.java
@@ -627,7 +627,13 @@ public void handle(ErrorCode errCode, Map data) {
                 }
             }).start();
         } finally {
-            lock.unlock();
+            try {
+                lock.unlock();
+            } catch (Exception e) {
+                ErrorCode errCode = Platform.inerr(e.getMessage());
+                new BootErrorLog().write(errCode.toString());
+                ret.success = false;
+            }
         }
 
         if (!ret.success || !Platform.IS_RUNNING) {