【HelloHBase】Hbase-2.1.0 首个操作程序及调试过程

1 源码

package lsq.HelloHBase;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;
import org.mortbay.log.Log;

 

public class Chapter4 {

    public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;
    public static void main(String[] args) throws IOException {
        createTable("student",new String[] {"score"});
        insertData("student","Jack","score","English","69");
        insertData("student","Jack","score","Math","86");
        insertData("student","Jack","score","Computer","77");

        getData("student","Jack","score","English");
        
    }
    @SuppressWarnings("deprecation")
    public static void init() {
        configuration = HBaseConfiguration.create();
        //configuration.setConfiguration("hbase.rootdir","hdfs://idx046:9000/hbase");
        try {
            //connection = ConnectionFactory.createConnection(configuration);
            connection = ConnectionFactory.createConnection();
            admin = connection.getAdmin();
        }catch(IOException e) {
            e.printStackTrace();
        }
    }
    public static void close() {
        try {
            if (admin!=null) {
                admin.close();
            }
            if (null != connection ) {
                connection.close();
            }
        }catch(IOException e) {
            e.printStackTrace();
        }
    }
    public static void createTable(String myTableName, String[] colFamily) throws IOException {
        init();
        TableName tableName = TableName.valueOf(myTableName);
        if ( admin.tableExists(tableName )) {
            System.out.println("table exists!");
        }else {
            @SuppressWarnings("deprecation")
            HTableDescriptor hTableDescriptor = new HTableDescriptor(tableName);
            for (String str: colFamily) {
                HColumnDescriptor hColumnDescriptor = new HColumnDescriptor(str);
                hTableDescriptor.addFamily(hColumnDescriptor);
            }
            admin.createTable(hTableDescriptor);
        }
        close();
    }
    public static void insertData(String tableName,String rowkey,String colFamily, String col, String value) throws IOException {
        init();
        Table table = connection.getTable(TableName.valueOf(tableName));
        Put put = new Put(Bytes.toBytes(rowkey));
        put.addColumn(Bytes.toBytes(colFamily), Bytes.toBytes(col),Bytes.toBytes(value));
        table.put(put);
        table.close();
        close();
    }
    public static void getData(String tableName,String rowkey,String colFamily, String col ) throws IOException {
        init();
        Table table = connection.getTable(TableName.valueOf(tableName));
        Get get = new Get(Bytes.toBytes(rowkey));
        get.addColumn(Bytes.toBytes(colFamily), Bytes.toBytes(col) );
        Result result = table.get(get);
        String msg = new String(result.getValue(colFamily.getBytes(),col==null?null:col.getBytes()));
        System.out.println(msg);
        Log.info(msg );
        table.close();
        close();
    }
}

2 调试过程

问题#1

/*
[lsq@idx046 ~/data]$ hadoop jar HelloHBase-0.0.1-SNAPSHOT.jar lsq.HelloHBase.Chapter4
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/client/TableDesc
riptor    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:214)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.client.TableDescriptor
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 4 more

原因： 缺少 org/apache/hadoop/hbase/client/ ??
 编辑 pom.xml  , 添加依赖包复制：
 
org.apache.maven.plugins
maven-dependency-plugin
3.1.0

   
        copy-dependencies
        prepare-package
       
            copy-dependencies
       
       
           
            ${project.build.directory}/classes/lib
   
            true
   
         true
      
 

OK

 */

问题#2

/*
[lsq@idx046 ~/data]$ hadoop jar HelloHBase-0.0.1-SNAPSHOT.jar lsq.HelloHBase.Chapter4
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hbase/thirdparty/com/google/c
ommon/cache/CacheLoader    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:202)    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:114)    at lsq.HelloHBase.Chapter4.init(Chapter4.java:31)
    at lsq.HelloHBase.Chapter4.createTable(Chapter4.java:50)
    at lsq.HelloHBase.Chapter4.main(Chapter4.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.ClassNotFoundException: org.apache.hbase.thirdparty.com.google.common.cache.Ca
cheLoader    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 11 more
    
    
错误： 缺少    org/apache/hbase/thirdparty/com/google/common/cache/ ？？
参考： 检查一下是否有guava.jar这个包？或者存在多个版本？     
查找：    --NOTICES.txt:
This product includes guava

Licensed under Apache License, Version 2.0, see LICENSE for details.

incorporated from com.google.guava:guava:jar:11.0.2

For source see 'http://code.google.com/p/guava-libraries/guava/guava'.
--
编辑 pom.xml, 添加依赖包 :
com.google.guava:guava:jar:11.0.2
OK ！

*/

问题#3

/*
[lsq@idx046 ~/data]$ hadoop jar HelloHBase-0.0.1-SNAPSHOT.jar lsq.HelloHBase.Chapter4
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hbase/thirdparty/com/google/c
ommon/util/concurrent/ListeningExecutorService    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:202)    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:114)    at lsq.HelloHBase.Chapter4.init(Chapter4.java:31)
    at lsq.HelloHBase.Chapter4.createTable(Chapter4.java:50)
    at lsq.HelloHBase.Chapter4.main(Chapter4.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.ClassNotFoundException: org.apache.hbase.thirdparty.com.google.common.util.con
current.ListeningExecutorService    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 11 more
    
    
    错误： 缺少 org/apache/hbase/thirdparty/ ???    
    查看 NOTICES.txt ， 编辑 pom.xml 添加依赖包：
     org.apache.hbase.thirdparty:hbase-shaded-miscellaneous:jar:2.1.0    
     org.apache.hbase.thirdparty:hbase-shaded-netty:jar:2.1.0
      org.apache.hbase.thirdparty:hbase-shaded-protobuf:jar:2.1.0      
      OK!
*/

问题#4

 

/*
[lsq@idx046 ~/data]$ hadoop jar HelloHBase-0.0.1-SNAPSHOT.jar lsq.HelloHBase.Chapter4
18/10/30 09:17:20 DEBUG util.NativeCodeLoader: Trying to load the custom-built native-hadoop librar
y...18/10/30 09:17:20 DEBUG util.NativeCodeLoader: Loaded the native-hadoop library
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/shaded/protobuf/
generated/MasterProtos$MasterService$BlockingInterface    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:210)    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:114)    at lsq.HelloHBase.Chapter4.init(Chapter4.java:31)
    at lsq.HelloHBase.Chapter4.createTable(Chapter4.java:50)
    at lsq.HelloHBase.Chapter4.main(Chapter4.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.shaded.protobuf.generated.Mast
erProtos$MasterService$BlockingInterface    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 24 more
[lsq@idx046 ~/data]$

错误： 缺少 org/apache/hadoop/hbase/shaded/protobuf/ ???
查看 NOTICES.txt 编辑 pom.xml 添加依赖包： org.apache.hbase:hbase-protocol-shaded:jar:2.1.0
OK !

*/

问题#5

 

/*
[lsq@idx046 ~/data]$ hadoop jar HelloHBase-0.0.1-SNAPSHOT.jar lsq.HelloHBase.Chapter4
18/10/30 09:22:22 DEBUG util.NativeCodeLoader: Trying to load the custom-built native-hadoop librar
y...18/10/30 09:22:22 DEBUG util.NativeCodeLoader: Loaded the native-hadoop library
java.io.IOException: java.lang.reflect.InvocationTargetException
    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:221)    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:114)    at lsq.HelloHBase.Chapter4.init(Chapter4.java:31)
    at lsq.HelloHBase.Chapter4.createTable(Chapter4.java:50)
    at lsq.HelloHBase.Chapter4.main(Chapter4.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java
:62)    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorI
mpl.java:45)    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:219)    ... 10 more
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/lang3/ArrayUtils
    at org.apache.hadoop.hbase.HConstants.(HConstants.java:1177)
    at org.apache.hadoop.hbase.client.ConnectionUtils.getPauseTime(ConnectionUtils.java:82)
    at org.apache.hadoop.hbase.client.AsyncProcess.(AsyncProcess.java:201)
    at org.apache.hadoop.hbase.client.ConnectionImplementation.(ConnectionImplementation.
java:265)    ... 15 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3.ArrayUtils
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 19 more
Exception in thread "main" java.lang.NullPointerException
    at lsq.HelloHBase.Chapter4.createTable(Chapter4.java:52)
    at lsq.HelloHBase.Chapter4.main(Chapter4.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
[lsq@idx046 ~/data]$

错误 ： Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3.ArrayUtils
 查看 NOTICES.txt 编辑 pom.xml 添加依赖包：org.apache.commons:commons-lang3:jar:3.6  
OK !
*/

问题#6

/*

18/10/30 10:24:01 INFO zookeeper.ZooKeeper: Client environment:java.library.path=/panks/data02/lsq/
idx030/app/hadoop-2.7.3/lib/native18/10/30 10:24:01 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/tmp
18/10/30 10:24:01 INFO zookeeper.ZooKeeper: Client environment:java.compiler=
18/10/30 10:24:01 INFO zookeeper.ZooKeeper: Client environment:os.name=Linux
18/10/30 10:24:01 INFO zookeeper.ZooKeeper: Client environment:os.arch=amd64
18/10/30 10:24:01 INFO zookeeper.ZooKeeper: Client environment:os.version=2.6.32-358.el6.x86_64
18/10/30 10:24:01 INFO zookeeper.ZooKeeper: Client environment:user.name=lsq
18/10/30 10:24:01 INFO zookeeper.ZooKeeper: Client environment:user.home=/u/lsq
18/10/30 10:24:01 INFO zookeeper.ZooKeeper: Client environment:user.dir=/panks/data02/lsq/idx030/da
ta18/10/30 10:24:01 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=idx046:2181
 sessionTimeout=90000 watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$12/259950055@4c285d8118/10/30 10:24:01 INFO zookeeper.ClientCnxn: Opening socket connection to server idx046.njcc.com/19
2.168.30.46:2181. Will not attempt to authenticate using SASL (unknown error)18/10/30 10:24:01 INFO zookeeper.ClientCnxn: Socket connection established to idx046.njcc.com/192.1
68.30.46:2181, initiating session18/10/30 10:24:01 INFO zookeeper.ClientCnxn: Session establishment complete on server idx046.njcc.c
om/192.168.30.46:2181, sessionid = 0x166bfdd54bf0006, negotiated timeout = 9000018/10/30 10:24:02 INFO zookeeper.ReadOnlyZKClient: Close zookeeper connection 0x36ebc363 to idx046:
2181java.io.IOException: java.lang.reflect.InvocationTargetException
    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:221)    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:87)    at lsq.HelloHBase.Chapter4.init(Chapter4.java:32)
    at lsq.HelloHBase.Chapter4.createTable(Chapter4.java:51)
    at lsq.HelloHBase.Chapter4.main(Chapter4.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java
:62)    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorI
mpl.java:45)    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java
:219)    ... 10 more
Caused by: java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/protobuf/generated/Authenticatio
nProtos$TokenIdentifier$Kind    at org.apache.hadoop.hbase.ipc.AbstractRpcClient.(AbstractRpcClient.java:110)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at org.apache.hadoop.hbase.util.ReflectionUtils.instantiateWithCustomCtor(ReflectionUtils.j
ava:43)    at org.apache.hadoop.hbase.ipc.RpcClientFactory.createClient(RpcClientFactory.java:88)
    at org.apache.hadoop.hbase.ipc.RpcClientFactory.createClient(RpcClientFactory.java:64)
    at org.apache.hadoop.hbase.client.ConnectionImplementation.(ConnectionImplementation.
java:289)    ... 15 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.protobuf.generated.Authenticat
ionProtos$TokenIdentifier$Kind    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 22 more
Exception in thread "main" java.lang.NullPointerException
    at lsq.HelloHBase.Chapter4.createTable(Chapter4.java:53)
    at lsq.HelloHBase.Chapter4.main(Chapter4.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
18/10/30 10:24:02 INFO zookeeper.ZooKeeper: Session: 0x166bfdd54bf0006 closed
18/10/30 10:24:02 INFO zookeeper.ClientCnxn: EventThread shut down
[lsq@idx046 ~/data]$

错误： Caused by: java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/protobuf/generated/Authenticatio
nProtos$TokenIdentifier$Kind ??

org.apache.hadoop:hadoop-annotations:jar:2.7.4 : no hbase ?
org.apache.hadoop:hadoop-auth:jar:2.7.4 : no
org.apache.hadoop:hadoop-common:jar:2.7.4 : no

org.apache.hbase:hbase-hadoop2-compat:jar:2.1.0: no protobuf ?
org.apache.hbase:hbase-hadoop-compat:jar:2.1.0

 编辑 pom.xml 添加依赖包：
     org.apache.hbase:hbase-protocol:jar:2.1.0
OK!

*/

问题#7

 

/*

Exception in thread "main" org.apache.hadoop.hbase.DoNotRetryIOException: java.lang.NoClassDefFound
Error: com/codahale/metrics/Metric    at org.apache.hadoop.hbase.client.RpcRetryingCallerImpl.translateException(RpcRetryingCalle
rImpl.java:220)    at org.apache.hadoop.hbase.client.RpcRetryingCallerImpl.callWithRetries(RpcRetryingCallerIm
pl.java:119)    at org.apache.hadoop.hbase.client.HTable.get(HTable.java:386)
    at org.apache.hadoop.hbase.client.HTable.get(HTable.java:360)
    at org.apache.hadoop.hbase.MetaTableAccessor.getTableState(MetaTableAccessor.java:1078)
    at org.apache.hadoop.hbase.MetaTableAccessor.tableExists(MetaTableAccessor.java:403)
    at org.apache.hadoop.hbase.client.HBaseAdmin$6.rpcCall(HBaseAdmin.java:445)
    at org.apache.hadoop.hbase.client.HBaseAdmin$6.rpcCall(HBaseAdmin.java:442)
    at org.apache.hadoop.hbase.client.RpcRetryingCallable.call(RpcRetryingCallable.java:58)
    at org.apache.hadoop.hbase.client.RpcRetryingCallerImpl.callWithRetries(RpcRetryingCallerIm
pl.java:107)    at org.apache.hadoop.hbase.client.HBaseAdmin.executeCallable(HBaseAdmin.java:3084)
    at org.apache.hadoop.hbase.client.HBaseAdmin.executeCallable(HBaseAdmin.java:3076)
    at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:442)
    at lsq.HelloHBase.Chapter4.createTable(Chapter4.java:53)
    at lsq.HelloHBase.Chapter4.main(Chapter4.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.NoClassDefFoundError: com/codahale/metrics/Metric
    at org.apache.hadoop.hbase.ipc.AbstractRpcClient.callMethod(AbstractRpcClient.java:402)
    at org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:
328)    at org.apache.hadoop.hbase.ipc.AbstractRpcClient.access$200(AbstractRpcClient.java:95)
    at org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlock
ingMethod(AbstractRpcClient.java:571)
    at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$BlockingStu
b.get(ClientProtos.java:42510)
    at org.apache.hadoop.hbase.client.ClientServiceCallable.doGet(ClientServiceCallable.java:50)
    at org.apache.hadoop.hbase.client.HTable$1.rpcCall(HTable.java:381)
    at org.apache.hadoop.hbase.client.HTable$1.rpcCall(HTable.java:376)
    at org.apache.hadoop.hbase.client.RegionServerCallable.call(RegionServerCallable.java:127)
    at org.apache.hadoop.hbase.client.RpcRetryingCallerImpl.callWithRetries(RpcRetryingCallerIm
pl.java:107)    ... 19 more
Caused by: java.lang.ClassNotFoundException: com.codahale.metrics.Metric
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 29 more
[lsq@idx046 ~/data]$

错误：Caused by: java.lang.NoClassDefFoundError: com/codahale/metrics/Metric ??
添加依赖包： io.dropwizard.metrics:metrics-core:jar:3.2.1
OK!

*/

 

问题#8:

/*

18/10/30 11:00:35 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=idx046:2181
sessionTimeout=90000 watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$12/259950055@4c285d81
18/10/30 11:00:35 INFO zookeeper.ClientCnxn: Opening socket connection to server idx046.njcc.com/192.168.30.46:2181.
Will not attempt to authenticate using SASL (unknown error)
18/10/30 11:00:35 INFO zookeeper.ClientCnxn: Socket connection established to idx046.njcc.com/192.168.30.46:2181, initiating session
18/10/30 11:00:35 INFO zookeeper.ClientCnxn: Session establishment complete on server idx046.njcc.com/192.168.30.46:2181,
 sessionid = 0x166bfdd54bf0009, negotiated timeout = 90000
18/10/30 11:00:40 INFO client.HBaseAdmin: Operation: CREATE, Table Name: default:student, procId: 5completed
18/10/30 11:00:40 INFO client.ConnectionImplementation: Closing master protocol: MasterService
18/10/30 11:00:40 INFO zookeeper.ReadOnlyZKClient: Close zookeeper connection 0x6a6cb05c to idx046:2181
18/10/30 11:00:40 INFO zookeeper.ZooKeeper: Session: 0x166bfdd54bf0009 closed
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: EventThread shut down
18/10/30 11:00:40 INFO zookeeper.ReadOnlyZKClient: Connect 0x3a393455 to idx046:2181
with session timeout=90000ms, retries 30, retry interval 1000ms, keepAlive=60000ms
18/10/30 11:00:40 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=idx046:2181
sessionTimeout=90000 watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$12/259950055@4c285d81
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Opening socket connection to server idx046.njcc.com/192.168.30.46:2181.
Will not attempt to authenticate using SASL (unknown error)
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Socket connection established to idx046.njcc.com/192.168.30.46:2181, initiating session
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Session establishment complete on server idx046.njcc.com/192.168.30.46:2181,
sessionid = 0x166bfdd54bf000a, negotiated timeout = 90000
18/10/30 11:00:40 INFO zookeeper.ReadOnlyZKClient: Close zookeeper connection 0x3a393455 to idx046:2181
18/10/30 11:00:40 INFO zookeeper.ZooKeeper: Session: 0x166bfdd54bf000a closed
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: EventThread shut down
18/10/30 11:00:40 INFO zookeeper.ReadOnlyZKClient: Connect 0x19553973 to idx046:2181 with session t
imeout=90000ms, retries 30, retry interval 1000ms, keepAlive=60000ms
18/10/30 11:00:40 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=idx046:2181
sessionTimeout=90000 watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$12/259950055@4c285d81
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Opening socket connection to server idx046.njcc.com/192.168.30.46:2181. Will not attempt to authenticate using SASL (unknown error)
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Socket connection established to idx046.njcc.com/192.168.30.46:2181, initiating session
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Session establishment complete on server idx046.njcc.com/192.168.30.46:2181, sessionid = 0x166bfdd54bf000b, negotiated timeout = 90000
18/10/30 11:00:40 INFO zookeeper.ReadOnlyZKClient: Close zookeeper connection 0x19553973 to idx046:2181
18/10/30 11:00:40 INFO zookeeper.ZooKeeper: Session: 0x166bfdd54bf000b closed
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: EventThread shut down
18/10/30 11:00:40 INFO zookeeper.ReadOnlyZKClient: Connect 0x312ab28e to idx046:2181 with session timeout=90000ms,
retries 30, retry interval 1000ms, keepAlive=60000ms
18/10/30 11:00:40 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=idx046:2181
sessionTimeout=90000 watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$12/259950055@4c285d81
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Opening socket connection to server idx046.njcc.com/192.168.30.46:2181.
Will not attempt to authenticate using SASL (unknown error)
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Socket connection established to idx046.njcc.com/192.168.30.46:2181, initiating session
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Session establishment complete on server idx046.njcc.com/192.168.30.46:2181,
sessionid = 0x166bfdd54bf000c, negotiated timeout = 90000
18/10/30 11:00:40 INFO zookeeper.ReadOnlyZKClient: Close zookeeper connection 0x312ab28e to idx046:2181
18/10/30 11:00:40 INFO zookeeper.ZooKeeper: Session: 0x166bfdd54bf000c closed
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: EventThread shut down
18/10/30 11:00:40 INFO zookeeper.ReadOnlyZKClient: Connect 0x03e10dc6 to idx046:2181 with session timeout=90000ms,
retries 30, retry interval 1000ms, keepAlive=60000ms
18/10/30 11:00:40 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=idx046:2181
sessionTimeout=90000 watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$12/259950055@4c285d81
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Opening socket connection to server idx046.njcc.com/192.168.30.46:2181.
Will not attempt to authenticate using SASL (unknown error)
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Socket connection established to idx046.njcc.com/192.168.30.46:2181, initiating session
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: Session establishment complete on server idx046.njcc.com/192.168.30.46:2181,
sessionid = 0x166bfdd54bf000d, negotiated timeout = 90000
69 ---这里！是输出！
18/10/30 11:00:40 INFO zookeeper.ReadOnlyZKClient: Close zookeeper connection 0x03e10dc6 to idx046:2181
18/10/30 11:00:40 INFO zookeeper.ZooKeeper: Session: 0x166bfdd54bf000d closed
18/10/30 11:00:40 INFO zookeeper.ClientCnxn: EventThread shut down
[lsq@idx046 ~/data]$

正常结束了，没有输出？

shell查看：

hbase(main):001:0> list
TABLE                                                                                                                                                                
member                                                                                                                                                               
student                                                                                                                                                              
2 row(s)
Took 2.0126 seconds                                                                                                                                                  
=> ["member", "student"]
 表创建成功！
 
hbase(main):005:0> descipter student
NameError: undefined local variable or method `student' for main:Object

hbase(main):006:0> scan 'student'
ROW                                        COLUMN+CELL                                                                                                               
 Jack                                      column=score:Computer, timestamp=1540868440851, value=77                                                                  
 Jack                                      column=score:English, timestamp=1540868440711, value=69                                                                   
 Jack                                      column=score:Math, timestamp=1540868440781, value=86                                                                      
1 row(s)
Took 0.8493 seconds           
表插入成功！
               
hbase(main):008:0> get 'student','Jack',{COLUMN=>'score:English'}
COLUMN                                     CELL                                                                                                                      
 score:English                             timestamp=1540868440711, value=69                                                                                         
1 row(s)
Took 0.0106 seconds    
读取正确！

疑问： 程序的输出语句怎么看不到输出信息？

增加输出语句：
        String msg = new String(result.getValue(colFamily.getBytes(),col==null?null:col.getBytes()));
        System.out.println(msg);
        Log.info(msg ); -- 新增！
*/

/*
18/10/30 11:24:52 INFO zookeeper.ClientCnxn: Session establishment complete on server idx046.njcc.com/192.168.30.46:2181, sessionid = 0x166bfdd54bf0014, negotiated t
imeout = 90000
69 --啊，这里是输出！
18/10/30 11:24:52 INFO mortbay.log: Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog
18/10/30 11:24:52 INFO mortbay.log: 69  -- 新增！
18/10/30 11:24:52 INFO zookeeper.ReadOnlyZKClient: Close zookeeper connection 0x101639ae to idx046:2181
18/10/30 11:24:52 INFO zookeeper.ZooKeeper: Session: 0x166bfdd54bf0014 closed
18/10/30 11:24:52 INFO zookeeper.ClientCnxn: EventThread shut down

*/