diff --git a/contrib/dataimporthandler/src/main/java/org/apache/solr/handler/dataimport/DataImporter.java b/contrib/dataimporthandler/src/main/java/org/apache/solr/handler/dataimport/DataImporter.java
index 7ab64b2efe8..549d940f3b1 100644
--- a/contrib/dataimporthandler/src/main/java/org/apache/solr/handler/dataimport/DataImporter.java
+++ b/contrib/dataimporthandler/src/main/java/org/apache/solr/handler/dataimport/DataImporter.java
@@ -385,7 +385,7 @@ public class DataImporter {
   }
 
   void runCmd(RequestParams reqParams, SolrWriter sw, Map<String, String> variables) {
-    if (importLock.tryLock())
+    if (!importLock.tryLock())
       return;
     try {
       String command = reqParams.command;