[LICENCE] add missing licence
Signed-off-by: bertty <bertty@apache.org>
diff --git a/wayang-benchmark/code/main/java/org/apache/wayang/apps/grep/Grep.java b/wayang-benchmark/code/main/java/org/apache/wayang/apps/grep/Grep.java
index 6781b08..35d483c 100644
--- a/wayang-benchmark/code/main/java/org/apache/wayang/apps/grep/Grep.java
+++ b/wayang-benchmark/code/main/java/org/apache/wayang/apps/grep/Grep.java
@@ -1,9 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
package org.apache.wayang.apps.grep;
import java.io.IOException;
import java.io.Serializable;
import java.nio.file.Files;
-import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Iterator;
import org.apache.flink.api.java.ExecutionEnvironment;
diff --git a/wayang-platforms/wayang-spark/code/main/resources/wayang-spark-defaults.properties b/wayang-platforms/wayang-spark/code/main/resources/wayang-spark-defaults.properties
index 262fcbe..7b4feb3 100644
--- a/wayang-platforms/wayang-spark/code/main/resources/wayang-spark-defaults.properties
+++ b/wayang-platforms/wayang-spark/code/main/resources/wayang-spark-defaults.properties
@@ -15,7 +15,7 @@
# limitations under the License.
#
-spark.master = local[*]
+spark.master = local[1]
spark.app.name = Wayang App
spark.ui.showConsoleProgress = false
spark.driver.allowMultipleContexts=true
