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Opening of rocksDB in datanode fails with "No locks available"
Signed-off-by: Nanda kumar <nanda@apache.org>
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128
...er-service/src/test/java/org/apache/hadoop/ozone/container/common/TestContainerCache.java
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/* | ||
* 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. | ||
*/ | ||
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package org.apache.hadoop.ozone.container.common; | ||
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import org.apache.hadoop.fs.FileSystemTestHelper; | ||
import org.apache.hadoop.hdds.conf.OzoneConfiguration; | ||
import org.apache.hadoop.ozone.OzoneConfigKeys; | ||
import org.apache.hadoop.ozone.container.common.utils.ContainerCache; | ||
import org.apache.hadoop.ozone.container.common.utils.ReferenceCountedDB; | ||
import org.apache.hadoop.utils.MetadataStore; | ||
import org.apache.hadoop.utils.MetadataStoreBuilder; | ||
import org.junit.Assert; | ||
import org.junit.Rule; | ||
import org.junit.Test; | ||
import org.junit.rules.ExpectedException; | ||
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import java.io.File; | ||
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/** | ||
* Test ContainerCache with evictions. | ||
*/ | ||
public class TestContainerCache { | ||
private static String testRoot = new FileSystemTestHelper().getTestRootDir(); | ||
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@Rule | ||
public ExpectedException thrown = ExpectedException.none(); | ||
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private void createContainerDB(OzoneConfiguration conf, File dbFile) | ||
throws Exception { | ||
MetadataStore store = MetadataStoreBuilder.newBuilder().setConf(conf) | ||
.setCreateIfMissing(true).setDbFile(dbFile).build(); | ||
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// we close since the SCM pre-creates containers. | ||
// we will open and put Db handle into a cache when keys are being created | ||
// in a container. | ||
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store.close(); | ||
} | ||
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@Test | ||
public void testContainerCacheEviction() throws Exception { | ||
File root = new File(testRoot); | ||
root.mkdirs(); | ||
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OzoneConfiguration conf = new OzoneConfiguration(); | ||
conf.setInt(OzoneConfigKeys.OZONE_CONTAINER_CACHE_SIZE, 2); | ||
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ContainerCache cache = ContainerCache.getInstance(conf); | ||
File containerDir1 = new File(root, "cont1"); | ||
File containerDir2 = new File(root, "cont2"); | ||
File containerDir3 = new File(root, "cont3"); | ||
File containerDir4 = new File(root, "cont4"); | ||
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createContainerDB(conf, containerDir1); | ||
createContainerDB(conf, containerDir2); | ||
createContainerDB(conf, containerDir3); | ||
createContainerDB(conf, containerDir4); | ||
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// Get 2 references out of the same db and verify the objects are same. | ||
ReferenceCountedDB db1 = cache.getDB(1, "RocksDB", | ||
containerDir1.getPath(), conf); | ||
Assert.assertEquals(1, db1.getReferenceCount()); | ||
ReferenceCountedDB db2 = cache.getDB(1, "RocksDB", | ||
containerDir1.getPath(), conf); | ||
Assert.assertEquals(2, db2.getReferenceCount()); | ||
Assert.assertEquals(2, db1.getReferenceCount()); | ||
Assert.assertEquals(db1, db2); | ||
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// add one more references to ContainerCache. | ||
ReferenceCountedDB db3 = cache.getDB(2, "RocksDB", | ||
containerDir2.getPath(), conf); | ||
Assert.assertEquals(1, db3.getReferenceCount()); | ||
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// and close the reference | ||
db3.close(); | ||
Assert.assertEquals(0, db3.getReferenceCount()); | ||
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Assert.assertTrue(cache.isFull()); | ||
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// add one more reference to ContainerCache and verify that it will not | ||
// evict the least recent entry as it has reference. | ||
ReferenceCountedDB db4 = cache.getDB(3, "RocksDB", | ||
containerDir3.getPath(), conf); | ||
Assert.assertEquals(1, db4.getReferenceCount()); | ||
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Assert.assertEquals(2, cache.size()); | ||
Assert.assertNotNull(cache.get(containerDir1.getPath())); | ||
Assert.assertNull(cache.get(containerDir2.getPath())); | ||
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// Now close both the references for container1 | ||
db1.close(); | ||
db2.close(); | ||
Assert.assertEquals(0, db1.getReferenceCount()); | ||
Assert.assertEquals(0, db2.getReferenceCount()); | ||
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// The reference count for container1 is 0 but it is not evicted. | ||
ReferenceCountedDB db5 = cache.getDB(1, "RocksDB", | ||
containerDir1.getPath(), conf); | ||
Assert.assertEquals(1, db5.getReferenceCount()); | ||
Assert.assertEquals(db1, db5); | ||
db5.close(); | ||
db4.close(); | ||
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// Decrementing reference count below zero should fail. | ||
thrown.expect(IllegalArgumentException.class); | ||
db5.close(); | ||
} | ||
} |