From 274f215aa4fd6d407e2fbd9af9ce9a94dad9bd23 Mon Sep 17 00:00:00 2001
From: Kaituo Li <kaituo@amazon.com>
Date: Wed, 19 Feb 2020 20:37:53 -0800
Subject: [PATCH] Send back error response when failing to stop detector

Previously, a stop detector api request hangs until timeout if there is a failure.

Testing done:
* verified the issue is fixed
---
 .../ad/rest/RestDeleteAnomalyDetectorAction.java                 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main/java/com/amazon/opendistroforelasticsearch/ad/rest/RestDeleteAnomalyDetectorAction.java b/src/main/java/com/amazon/opendistroforelasticsearch/ad/rest/RestDeleteAnomalyDetectorAction.java
index c6a08a06..cbe14149 100644
--- a/src/main/java/com/amazon/opendistroforelasticsearch/ad/rest/RestDeleteAnomalyDetectorAction.java
+++ b/src/main/java/com/amazon/opendistroforelasticsearch/ad/rest/RestDeleteAnomalyDetectorAction.java
@@ -133,6 +133,7 @@ public void onResponse(StopDetectorResponse stopDetectorResponse) {
             @Override
             public void onFailure(Exception e) {
                 logger.error("Failed to delete AD model for detector " + detectorId, e);
+                channel.sendResponse(new BytesRestResponse(RestStatus.INTERNAL_SERVER_ERROR, "Failed to delete AD model"));
             }
         };
     }