无法连接HBase

Question

在Cloudera-quickstart-VM上运行的Hbase也通过使用hbase shell验证了Zookeeper和Hbase是否正在运行，但是当我尝试使用java程序创建一个表时，我得到了下面的错误。

public static void main(String[] args) throws IOException {
    Configuration config=new HBaseConfiguration().create();
    config.set("hbase.zookeeper.quorum","sandbox.hortonworks.com");
    config.set("zookeeper.znode.parent", "/hbase-unsecure");
    //config.set("hbase.master", "hostname"+":16000");
    Connection conn=ConnectionFactory.createConnection(config);
    
    Admin admin=conn.getAdmin();
    HTableDescriptor tableName=new HTableDescriptor("notification");
    tableName.addFamily(new HColumnDescriptor("attribute"));
    tableName.addFamily(new HColumnDescriptor("metrics"));
    
    if(!admin.tableExists(tableName.getTableName())) {
        
        System.out.println("create table ...");
        admin.createTable(tableName);
        System.out.println("done");
    }
    
    
}

查找Cloudera Virtual Box配置

[maria_dev@sandbox ~]$ cat /etc/hosts
127.0.0.1       localhost
::1     localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.2      sandbox.hortonworks.com

找到window主机文件config：

127.0.0.1           localhost
#   ::1             localhost
172.17.0.2          sandbox.hortonworks.com

连接时出错

2020-07-04 19:09:02 INFO  ClientCnxn:975 - Opening socket connection to server sandbox.hortonworks.com/172.17.0.2:2181. Will not attempt to authenticate using SASL (unknown error)
2020-07-04 19:09:23 WARN  ClientCnxn:1102 - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection timed out: no further information
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
    at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)
2020-07-04 19:09:23 DEBUG ClientCnxnSocketNIO:192 - Ignoring exception during shutdown input
java.nio.channels.ClosedChannelException
    at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:780)
    at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:399)
    at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:189)
    at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1185)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1110)
2020-07-04 19:09:23 DEBUG ClientCnxnSocketNIO:199 - Ignoring exception during shutdown output
java.nio.channels.ClosedChannelException

Answer 1

我不知道它是否相关，但create是一个静态函数。它一定是

Configuration config=HBaseConfiguration.create();

不

new HBaseConfiguration().create();。

还要确保您的zookeeper端口是2181。如果不是，则为其提供"hbase.zookeeper.property.clientPort“属性。

Answer 2

虽然不可能准确地指出问题可能是在哪里造成的，但似乎您在服务器url中获得了太多内容：

sandbox.hortonworks.com/172.17.0.2:2181

假设域名或ip地址都可以，但两者合在一起是无效的。

此外，请记住，Hortonworks已经与Cloudera合并，并且HDP有一个后继者，称为Cloudera数据平台。对于所有新的群集设置，建议使用此选项。沙箱等效项可以通过here访问。

完全披露:我是Cloudera (前身为Hortonworks)的员工，HDP和CDP背后的公司