Question

我写了一个很短的程序来连接Hbase。

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.ClusterStatus;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.HBaseAdmin;
public class HbaseMonitor {
        public static void main(String args[]){
                Configuration conf = new Configuration();
                try{
                        HBaseAdmin hbaseAdmin = new HBaseAdmin(conf);
                        ClusterStatus clusterStatus = hbaseAdmin.getClusterStatus();
                        System.out.println("Has regions: "+clusterStatus.getRegionsCount());
                }
                catch(Exception ex){
                        ex.printStackTrace();
                }
        }
}

使用hbase的lib目录中提供的相同jar进行编译，如下所示：

javac -cp /usr/lib/hbase/hbase-0.94.1-Intel.jar:/usr/lib/hadoop/hadoop-core-1.0.3-Intel.jar:/usr/lib/hbase/lib/commons-logging-1.1.1.jar:/usr/lib/hbase/lib/zookeeper.jar:/usr/lib/hbase/lib/commons-configuration-1.6.jar:/usr/lib/hbase/lib/commons-lang-2.5.jar:/usr/lib/hbase/lib/slf4j-api-1.4.3.jar:/usr/lib/hbase/lib/slf4j-log4j12-1.4.3.jar:/usr/lib/hbase/lib/log4j-1.2.16.jar:/usr/lib/hbase/lib/guava-11.0.2.jar:/usr/lib/hbase/lib/protobuf-java-2.4.0a.jar:. HbaseMonitor.java

当我运行它时，我得到以下例外：

15/03/19 17:47:07 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:2181 sessionTimeout=180000 watcher=hconnection
15/03/19 17:47:07 INFO zookeeper.RecoverableZooKeeper: The identifier of this process is 17277@ostrich-node1
15/03/19 17:47:07 INFO zookeeper.ClientCnxn: Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181. Will not attempt to authenticate using SASL (Unable to locate a login configuration)
15/03/19 17:47:07 INFO zookeeper.ClientCnxn: Socket connection established to localhost/0:0:0:0:0:0:0:1:2181, initiating session
15/03/19 17:47:07 INFO zookeeper.ClientCnxn: Session establishment complete on server localhost/0:0:0:0:0:0:0:1:2181, sessionid = 0x4c31791de7041e, negotiated timeout = 180000
15/03/19 17:47:07 INFO client.HConnectionManager$HConnectionImplementation: getMaster attempt 0 of 10 failed; retrying after sleep of 1006
java.io.IOException: Call to ostrich-node1/192.168.151.50:60000 failed on local exception: java.io.EOFException
    at org.apache.hadoop.hbase.ipc.HBaseClient.wrapException(HBaseClient.java:1110)
    at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:1079)
    at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:150)
    at com.sun.proxy.$Proxy5.getProtocolVersion(Unknown Source)
    at org.apache.hadoop.hbase.ipc.WritableRpcEngine.getProxy(WritableRpcEngine.java:183)
    at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:335)
    at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:312)
    at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:364)
    at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getMaster(HConnectionManager.java:710)
    at org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:141)
    at HbaseMonitor.main(HbaseMonitor.java:17)
Caused by: java.io.EOFException
    at java.io.DataInputStream.readInt(DataInputStream.java:375)
    at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.receiveResponse(HBaseClient.java:605)
    at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.run(HBaseClient.java:538)

telnet到hbase-master工作正常：

[root@ostrich-node1 test]# telnet ostrich-node1 60000
Trying 192.168.151.50...
Connected to ostrich-node1.
Escape character is '^]'.

localhost的telnet清楚地显示客户端可以连接到hbase：

[root@ostrich-node1 test]# telnet localhost 2181
Trying ::1...
Connected to localhost.
Escape character is '^]'.
^CConnection closed by foreign host.

主记录（hbase-hbase-master-ostrich-node1.log）显示以下异常警告：

2015-03-19 17:47:07,711 WARN org.apache.hadoop.ipc.SecureServer: Incorrect header or version mismatch from 192.168.151.50:57502 got version 3 expected version 4

根据上述警告，可以说我hadoop-core.jar使用的hbase与hadoop使用的[root@ostrich-node1 logs]# hbase version 15/03/19 17:59:17 INFO util.VersionInfo: HBase 0.94.1-Intel不同。是的。所以，我更换了罐子但遗憾的是错误并没有消失。

请注意，我已经在安装了hbase的同一台机器上执行了我的程序。

Hbase版本：

[root@ostrich-node1 logs]# hadoop version
Hadoop 1.0.3-Intel

Hadoop版本：

[root@ostrich-node1 logs]# hbase shell
HBase Shell; enter 'help<RETURN>' for list of supported commands.
Type "exit<RETURN>" to leave the HBase Shell
Version 0.94.1-Intel, r17177, Wed Sep 18 14:52:53 CST 2013

hbase(main):001:0> list
TABLE                                                                                                                                                                                                      
ATTR                                                                                                                                                                                                       
RECO                                                                                                                                                                                                       
SUBSCRIBER                                                                                                                                                                                                 
SUBSCRIBER2                                                                                                                                                                                                
TPETEST                                                                                                                                                                                                    
test                                                                                                                                                                                                       
6 row(s) in 1.0700 seconds

Hbase shell工作：

{{1}}

那么，问题可能是什么？请帮忙。

Answer 1

通过做以下事情，这对我有用：

在HBASE_CONF的结束中添加classpath的路径，如下所示（右键点击图片并在新标签中打开，如果它们也是小理解）：

enter image description here

注意：在我的hbase主节点中，HBASE_CONF = / usr / lib / hbase / conf。

不幸的是，但是在稍加修改的程序中使用了depreacted方法：

enter image description here

注意：HBaseConfiguration()已弃用，但适用于hbase-0.94.1（英特尔）。

输出如下所示：

enter image description here

抱歉，代码突出显示器无法处理大型代码。所以，我使用图像正确显示它们。

Java：连接到Hbase 0.94.1时出现异常

1 个答案: