diff --git a/graylog2-server/src/main/java/org/graylog/plugins/views/search/engine/QueryEngine.java b/graylog2-server/src/main/java/org/graylog/plugins/views/search/engine/QueryEngine.java
index <HASH>..<HASH> 100644
--- a/graylog2-server/src/main/java/org/graylog/plugins/views/search/engine/QueryEngine.java
+++ b/graylog2-server/src/main/java/org/graylog/plugins/views/search/engine/QueryEngine.java
@@ -102,7 +102,7 @@ public class QueryEngine {
                                 } else {
                                     error = new QueryError(query, cause);
                                 }
-                                LOG.error("Running query {} failed: {}", query.id(), cause);
+                                LOG.debug("Running query {} failed: {}", query.id(), cause);
                                 searchJob.addError(error);
                                 return QueryResult.failedQueryWithError(query, error);
                             }
Degrading query errors to `debug` instead of `error`.

These can be related to invalid queries posted against the API, so they
are not a general indicator of server malfunctioning.