| // 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.impala; |
| |
| import org.apache.hadoop.hive.ql.exec.UDF; |
| import org.apache.hadoop.io.IntWritable; |
| |
| import java.lang.System; |
| |
| public class JavaGcUdfTest extends UDF { |
| public JavaGcUdfTest() {} |
| |
| public IntWritable evaluate(IntWritable a) { |
| if (a == null) return null; |
| gc(); |
| return new IntWritable(a.get()); |
| } |
| |
| private void gc() { |
| for (int i = 0; i < 100; i++) { |
| int[] gc_array = new int[100]; |
| } |
| System.gc(); |
| } |
| } |