Update after review

Author: drempapis

x-pack/plugin/async-search/src/main/java/org/elasticsearch/xpack/search/AsyncSearchTask.java

@@ -387,11 +387,12 @@ public static AsyncStatusResponse getStatusResponse(AsyncSearchTask asyncTask) {
     public void close() {
         if (logger.isDebugEnabled()) {
             logger.debug(
-                "AsyncSearchTask.close(): byThread={}, asyncId={}, taskId={}, hasCompleted={}",
+                "AsyncSearchTask.close(): byThread={}, asyncId={}, taskId={}, hasCompleted={}, stack={}",
                 Thread.currentThread().getName(),
                 searchId != null ? searchId.getEncoded() : "<null>",
                 getId(),
-                hasCompleted
+                hasCompleted,
+                new Exception().getStackTrace()
             );
         }
         Releasables.close(searchResponse);

x-pack/plugin/async-search/src/main/java/org/elasticsearch/xpack/search/MutableSearchResponse.java

@@ -495,10 +495,11 @@ private String getShardsInResponseMismatchInfo(SearchResponse response, boolean
     public synchronized void close() {
         if (logger.isDebugEnabled()) {
             logger.debug(
-                "MutableSearchResponse.close(): byThread={}, finalResponsePresent={}, clusterResponsesCount={},",
+                "MutableSearchResponse.close(): byThread={}, finalResponsePresent={}, clusterResponsesCount={}, stack={}",
                 Thread.currentThread().getName(),
                 finalResponse != null,
-                clusterResponses != null ? clusterResponses.size() : 0
+                clusterResponses != null ? clusterResponses.size() : 0,
+                new Exception().getStackTrace()
             );
         }