| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.hadoop.hbase.oss; |
| |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.oss.sync.ZKTreeLockManager; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class TestRecursiveDelete extends HBaseObjectStoreSemanticsTest { |
| public static final Logger LOG = |
| LoggerFactory.getLogger(TestRecursiveDelete.class); |
| |
| @Test |
| public void testCreationAfterDeletion() throws Exception { |
| // This was an observed failure condition where creating a |
| // directory that we had just removed would be deadlocked |
| // because the thread that issued the original deletion still |
| // held the lock on the directory it deleted. |
| ExecutorService svc = Executors.newSingleThreadExecutor(); |
| Path tmp = testPath(".tmp"); |
| Path lock = testPath(".tmp/hbase-hbck.lock"); |
| |
| try { |
| hboss.mkdirs(tmp); |
| hboss.delete(tmp, true); |
| LOG.info("After mkdir and delete in test thread"); |
| summarizeZKLocks(); |
| |
| Future<?> fut = svc.submit(new Runnable() { |
| public void run() { |
| try { |
| hboss.mkdirs(tmp); |
| LOG.info("After mkdir in separate thread"); |
| summarizeZKLocks(); |
| try (FSDataOutputStream out = hboss.create(lock)) { |
| out.write(Bytes.toBytes("localhost")); |
| out.flush(); |
| } |
| } catch (Exception e) { |
| LOG.error("Caught exception", e); |
| Assert.fail("Failed to create file"); |
| } |
| } |
| }); |
| Assert.assertNull(fut.get(15, TimeUnit.SECONDS)); |
| } finally { |
| hboss.delete(tmp, true); |
| } |
| } |
| |
| void summarizeZKLocks() { |
| if (sync instanceof ZKTreeLockManager) { |
| LOG.info(((ZKTreeLockManager) sync).summarizeLocks()); |
| } |
| } |
| } |