本文整理汇总了Java中org.apache.hadoop.hdfs.server.namenode.NameNode.getState方法的典型用法代码示例。如果您正苦于以下问题：Java NameNode.getState方法的具体用法？Java NameNode.getState怎么用？Java NameNode.getState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.NameNode的用法示例。
在下文中一共展示了NameNode.getState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: testTransitionToActiveWhenOtherNamenodeisActive
import org.apache.hadoop.hdfs.server.namenode.NameNode; //导入方法依赖的package包/类
/**
* Test case to check whether both the name node is active or not
* @throws Exception
*/
@Test
public void testTransitionToActiveWhenOtherNamenodeisActive()
throws Exception {
NameNode nn1 = cluster.getNameNode(0);
NameNode nn2 = cluster.getNameNode(1);
if(nn1.getState() != null && !nn1.getState().
equals(HAServiceState.STANDBY.name()) ) {
cluster.transitionToStandby(0);
}
if(nn2.getState() != null && !nn2.getState().
equals(HAServiceState.STANDBY.name()) ) {
cluster.transitionToStandby(1);
}
//Making sure both the namenode are in standby state
assertTrue(nn1.isStandbyState());
assertTrue(nn2.isStandbyState());
// Triggering the transition for both namenode to Active
runTool("-transitionToActive", "nn1");
runTool("-transitionToActive", "nn2");
assertFalse("Both namenodes cannot be active", nn1.isActiveState()
&& nn2.isActiveState());
/* In this test case, we have deliberately shut down nn1 and this will
cause HAAAdmin#isOtherTargetNodeActive to throw an Exception
and transitionToActive for nn2 with forceActive switch will succeed
even with Exception */
cluster.shutdownNameNode(0);
if(nn2.getState() != null && !nn2.getState().
equals(HAServiceState.STANDBY.name()) ) {
cluster.transitionToStandby(1);
}
//Making sure both the namenode (nn2) is in standby state
assertTrue(nn2.isStandbyState());
assertFalse(cluster.isNameNodeUp(0));
runTool("-transitionToActive", "nn2", "--forceactive");
assertTrue("Namenode nn2 should be active", nn2.isActiveState());
}