diff --git a/colormipsearch-persist/src/main/java/org/janelia/colormipsearch/dao/DaosProvider.java b/colormipsearch-persist/src/main/java/org/janelia/colormipsearch/dao/DaosProvider.java
index 2dd55e39..f794748f 100644
--- a/colormipsearch-persist/src/main/java/org/janelia/colormipsearch/dao/DaosProvider.java
+++ b/colormipsearch-persist/src/main/java/org/janelia/colormipsearch/dao/DaosProvider.java
@@ -30,12 +30,11 @@ public static synchronized DaosProvider getInstance(Config config) {
         return instance;
     }
 
-    private final MongoClient mongoClient;
     private final MongoDatabase mongoDatabase;
     private final IdGenerator idGenerator;
 
     private DaosProvider(Config config) {
-        mongoClient = MongoDBHelper.createMongoClient(config.getStringPropertyValue("MongoDB.ConnectionURL"),
+        MongoClient mongoClient = MongoDBHelper.createMongoClient(config.getStringPropertyValue("MongoDB.ConnectionURL"),
                 config.getStringPropertyValue("MongoDB.Server"),
                 config.getStringPropertyValue("MongoDB.AuthDatabase"),
                 config.getStringPropertyValue("MongoDB.Username"),