PHOENIX-3726 Addendum to use modifiable list
diff --git a/phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java b/phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java
index 1155f7b..3e4f3b9 100644
--- a/phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java
+++ b/phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java
@@ -3085,8 +3085,7 @@
         try (HBaseAdmin admin = getAdmin()) {
             ensureNamespaceCreated(QueryConstants.SYSTEM_SCHEMA_NAME);
             
-             List<TableName> tableNames = Arrays
-                    .asList(admin.listTableNames(QueryConstants.SYSTEM_SCHEMA_NAME + "\\..*"));
+            List<TableName> tableNames = Lists.newArrayList(admin.listTableNames(QueryConstants.SYSTEM_SCHEMA_NAME + "\\..*"));
             if (tableNames.size() == 0) { return; }
             if (tableNames.size() > 5) {
                 logger.warn("Expected 5 system tables but found " + tableNames.size() + ":" + tableNames);