diff --git a/src/main/java/com/amazon/opendistroforelasticsearch/ad/transport/AnomalyResultTransportAction.java b/src/main/java/com/amazon/opendistroforelasticsearch/ad/transport/AnomalyResultTransportAction.java
index a3a9bf4e..213ab4dc 100644
--- a/src/main/java/com/amazon/opendistroforelasticsearch/ad/transport/AnomalyResultTransportAction.java
+++ b/src/main/java/com/amazon/opendistroforelasticsearch/ad/transport/AnomalyResultTransportAction.java
@@ -415,25 +415,26 @@ private ActionListener<SinglePointFeatures> onFeatureResponse(
     private Exception coldStartIfNoModel(AtomicReference<AnomalyDetectionException> failure, AnomalyDetector detector)
         throws AnomalyDetectionException {
         AnomalyDetectionException exp = failure.get();
-        if (exp != null) {
-            if (exp instanceof ResourceNotFoundException) {
-                // fetch previous cold start exception
-                String adID = detector.getDetectorId();
-                Exception previousException = stateManager.fetchColdStartException(adID);
-                if (previousException != null) {
-                    LOG.error("Previous exception of {}: {}", () -> adID, () -> previousException);
-                    if (previousException instanceof EndRunException && ((EndRunException) previousException).isEndNow()) {
-                        return previousException;
-                    }
-                }
-                LOG.info("Trigger cold start for {}", detector.getDetectorId());
-                coldStart(detector);
-                return previousException == null ? new InternalFailure(adID, NO_MODEL_ERR_MSG) : previousException;
-            } else {
-                throw exp;
+        if (exp == null) {
+            return null;
+        }
+
+        if (!(exp instanceof ResourceNotFoundException)) {
+            throw exp;
+        }
+
+        // fetch previous cold start exception
+        String adID = detector.getDetectorId();
+        Exception previousException = stateManager.fetchColdStartException(adID);
+        if (previousException != null) {
+            LOG.error("Previous exception of {}: {}", () -> adID, () -> previousException);
+            if (previousException instanceof EndRunException && ((EndRunException) previousException).isEndNow()) {
+                return previousException;
             }
         }
-        return null;
+        LOG.info("Trigger cold start for {}", detector.getDetectorId());
+        coldStart(detector);
+        return previousException == null ? new InternalFailure(adID, NO_MODEL_ERR_MSG) : previousException;
     }
 
     private void findException(Throwable cause, String adID, AtomicReference<AnomalyDetectionException> failure) {
@@ -792,23 +793,19 @@ private void coldStart(AnomalyDetector detector) {
                             stateManager
                                 .setLastColdStartException(
                                     detectorId,
-                                    new EndRunException(detector.getDetectorId(), "Invalid training data", exception, false)
+                                    new EndRunException(detectorId, "Invalid training data", exception, false)
                                 );
                         } else if (exception instanceof ElasticsearchTimeoutException) {
                             stateManager
                                 .setLastColdStartException(
                                     detectorId,
-                                    new InternalFailure(
-                                        detector.getDetectorId(),
-                                        "Time out while indexing cold start checkpoint",
-                                        exception
-                                    )
+                                    new InternalFailure(detectorId, "Time out while indexing cold start checkpoint", exception)
                                 );
                         } else {
                             stateManager
                                 .setLastColdStartException(
                                     detectorId,
-                                    new EndRunException(detector.getDetectorId(), "Error while training model", exception, false)
+                                    new EndRunException(detectorId, "Error while training model", exception, false)
                                 );
                         }
                     });
@@ -833,17 +830,14 @@ private void coldStart(AnomalyDetector detector) {
                 stateManager
                     .setLastColdStartException(
                         detectorId,
-                        new InternalFailure(detector.getDetectorId(), "Time out while getting training data", exception)
+                        new InternalFailure(detectorId, "Time out while getting training data", exception)
                     );
             } else if (exception instanceof AnomalyDetectionException) {
                 // e.g., Invalid search query
                 stateManager.setLastColdStartException(detectorId, exception);
             } else {
                 stateManager
-                    .setLastColdStartException(
-                        detectorId,
-                        new EndRunException(detector.getDetectorId(), "Error while cold start", exception, false)
-                    );
+                    .setLastColdStartException(detectorId, new EndRunException(detectorId, "Error while cold start", exception, false));
             }
         });