1 files changed, 4 insertions, 0 deletions
diff --git a/src/io/StreamImpl.java b/src/io/StreamImpl.java
index 27b07c2..3e432bf 100644
--- a/src/io/StreamImpl.java
+++ b/src/io/StreamImpl.java
@@ -119,6 +119,10 @@ public class StreamImpl implements Stream {
                 && workerContainer.getWorker().getKeywords().equals(keywordsStr)) {
             return;
         }
+        // a query is required.
+        if (keywords.isEmpty()) {
+            return;
+        }
         /* connect (or reconnect) after setting new keywords */
         disconnect();
         Worker worker = new Worker(keywordsStr);