Java api检查hbase是否已启动并正在运行

我正在尝试连接到HBase时处理故障情况.目前,我检查HBase是否与HBaseAdmin.checkHBaseAvailable(conf);一起运行.但是这个api只会在大约40秒之后抛出MasterNotRunning或ZookeeperConnectionException的异常.所以,我尝试设置以下重试,hbase.client.retries.number = 1和zookeeper.recovery.retry = 1.这让我在6-7秒内处理异常.但是,我需要一种更快速的方法来了解HBase集群是否正在运行,因为我正在我的应用程序中的同步调用中登录到HBase.

解决方法:

以这种方式检查连接怎么样：

import java.net.InetSocketAddress;
import org.apache.hadoop.hbase.ipc.HBaseRPC;
import org.apache.hadoop.hbase.ipc.HMasterInterface;
import org.apache.hadoop.hbase.ipc.RpcEngine;
...

public static boolean isRunning() {
    boolean result = false;
    Configuration conf = HBaseConfiguration.create();
    conf.clear();
    conf.set("hbase.zookeeper.quorum", "myhost");
    conf.set("hbase.zookeeper.property.clientPort", "2181");
    conf.set("hbase.master", "myhost:60000");

    RpcEngine rpcEngine = null;
    try {

        InetSocketAddress isa = new InetSocketAddress("myhost", 60000);
        rpcEngine = HBaseRPC.getProtocolEngine(conf);
        HMasterInterface master = rpcEngine.getProxy(HMasterInterface.class,
                HMasterInterface.VERSION, isa, conf, 1000);
        result = master.isMasterRunning();
    }
    catch (Exception e) {
        // ...
    }
    finally {
        if (rpcEngine != null) {
            rpcEngine.close();
        }
    }
    return result;
}

注意：我在这里假设版本> = 0.94.5