本文整理汇总了Java中org.apache.hadoop.hdfs.DistributedFileSystem.isInSafeMode方法的典型用法代码示例。如果您正苦于以下问题：Java DistributedFileSystem.isInSafeMode方法的具体用法？Java DistributedFileSystem.isInSafeMode怎么用？Java DistributedFileSystem.isInSafeMode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.DistributedFileSystem的用法示例。
在下文中一共展示了DistributedFileSystem.isInSafeMode方法的1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: testIsInSafemode
import org.apache.hadoop.hdfs.DistributedFileSystem; //导入方法依赖的package包/类
/**
* DFS#isInSafeMode should check the ActiveNNs safemode in HA enabled cluster. HDFS-3507
*
* @throws Exception
*/
@Test
public void testIsInSafemode() throws Exception {
// Check for the standby nn without client failover.
NameNode nn2 = cluster.getNameNode(1);
assertTrue("nn2 should be in standby state", nn2.isStandbyState());
InetSocketAddress nameNodeAddress = nn2.getNameNodeAddress();
Configuration conf = new Configuration();
DistributedFileSystem dfs = new DistributedFileSystem();
try {
dfs.initialize(
URI.create("hdfs://" + nameNodeAddress.getHostName() + ":"
+ nameNodeAddress.getPort()), conf);
dfs.isInSafeMode();
fail("StandBy should throw exception for isInSafeMode");
} catch (IOException e) {
if (e instanceof RemoteException) {
IOException sbExcpetion = ((RemoteException) e).unwrapRemoteException();
assertTrue("StandBy nn should not support isInSafeMode",
sbExcpetion instanceof StandbyException);
} else {
throw e;
}
} finally {
if (null != dfs) {
dfs.close();
}
}
// Check with Client FailOver
cluster.transitionToStandby(0);
cluster.transitionToActive(1);
cluster.getNameNodeRpc(1).setSafeMode(SafeModeAction.SAFEMODE_ENTER, false);
DistributedFileSystem dfsWithFailOver = (DistributedFileSystem) fs;
assertTrue("ANN should be in SafeMode", dfsWithFailOver.isInSafeMode());
cluster.getNameNodeRpc(1).setSafeMode(SafeModeAction.SAFEMODE_LEAVE, false);
assertFalse("ANN should be out of SafeMode", dfsWithFailOver.isInSafeMode());
}