本文整理汇总了Java中org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter.spyOnFsLock方法的典型用法代码示例。如果您正苦于以下问题：Java NameNodeAdapter.spyOnFsLock方法的具体用法？Java NameNodeAdapter.spyOnFsLock怎么用？Java NameNodeAdapter.spyOnFsLock使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter的用法示例。
在下文中一共展示了NameNodeAdapter.spyOnFsLock方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: testGetBlockLocationsOnlyUsesReadLock
import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter; //导入方法依赖的package包/类
/**
* Test that when access time updates are not needed, the FSNamesystem
* write lock is not taken by getBlockLocations.
* Regression test for HDFS-3981.
*/
@Test(timeout=60000)
public void testGetBlockLocationsOnlyUsesReadLock() throws IOException {
Configuration conf = new HdfsConfiguration();
conf.setInt(DFSConfigKeys.DFS_NAMENODE_ACCESSTIME_PRECISION_KEY, 100*1000);
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
.numDataNodes(0)
.build();
ReentrantReadWriteLock spyLock = NameNodeAdapter.spyOnFsLock(cluster.getNamesystem());
try {
// Create empty file in the FSN.
Path p = new Path("/empty-file");
DFSTestUtil.createFile(cluster.getFileSystem(), p, 0, (short)1, 0L);
// getBlockLocations() should not need the write lock, since we just created
// the file (and thus its access time is already within the 100-second
// accesstime precision configured above).
MockitoUtil.doThrowWhenCallStackMatches(
new AssertionError("Should not need write lock"),
".*getBlockLocations.*")
.when(spyLock).writeLock();
cluster.getFileSystem().getFileBlockLocations(p, 0, 100);
} finally {
cluster.shutdown();
}
}
示例2: testTransitionSynchronization
import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter; //导入方法依赖的package包/类
/**
* Regression test for HDFS-2693: when doing state transitions, we need to
* lock the FSNamesystem so that we don't end up doing any writes while it's
* "in between" states.
* This test case starts up several client threads which do mutation operations
* while flipping a NN back and forth from active to standby.
*/
@Test(timeout=120000)
public void testTransitionSynchronization() throws Exception {
Configuration conf = new Configuration();
final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
.nnTopology(MiniDFSNNTopology.simpleHATopology())
.numDataNodes(0)
.build();
try {
cluster.waitActive();
ReentrantReadWriteLock spyLock = NameNodeAdapter.spyOnFsLock(
cluster.getNameNode(0).getNamesystem());
Mockito.doAnswer(new GenericTestUtils.SleepAnswer(50))
.when(spyLock).writeLock();
final FileSystem fs = HATestUtil.configureFailoverFs(
cluster, conf);
TestContext ctx = new TestContext();
for (int i = 0; i < 50; i++) {
final int finalI = i;
ctx.addThread(new RepeatingTestThread(ctx) {
@Override
public void doAnAction() throws Exception {
Path p = new Path("/test-" + finalI);
fs.mkdirs(p);
fs.delete(p, true);
}
});
}
ctx.addThread(new RepeatingTestThread(ctx) {
@Override
public void doAnAction() throws Exception {
cluster.transitionToStandby(0);
Thread.sleep(50);
cluster.transitionToActive(0);
}
});
ctx.startThreads();
ctx.waitFor(20000);
ctx.stop();
} finally {
cluster.shutdown();
}
}