hbase连接测试时的常见错误

环境：CDH 5.8；HBase 1.2.0 ; Eclipse Mars

测试背景：在eclipse打jar包后，上传到集群服务器，以hadoop jar方式执行，报错如下：

1. NoSuchMethodError: org.apache.hadoop.hbase.HTableDescriptor.addFamily

Exception in thread "main" java.lang.NoSuchMethodError: org.apache.hadoop.hbase.HTableDescriptor.addFamily(Lorg/apache/hadoop/hbase/HColumnDescriptor;)Lorg/apache/hadoop/hbase/HTableDescriptor;
        at demo.myconnection.createTable(myconnection.java:61)
        at demo.myconnection.main(myconnection.java:44)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

2. Caused by: java.io.IOException: com.google.protobuf.ServiceException: java.lang.NoClassDefFoundError: com/yammer/metrics/core/Gauge

Exception in thread "main" org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed after attempts=36, exceptions:
Thu Jan 12 23:13:03 CST 2017, null, java.net.SocketTimeoutException: callTimeout=60000, callDuration=68266: row 'test1,,' on table 'hbase:meta' at region=hbase:meta,,1.1588230740, hostname=slave03,60020,1484120818621, seqNum=0
        at org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas.throwEnrichedException(RpcRetryingCallerWithReadReplicas.java:276)
        at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:207)
        at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:60)
        at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:200)
        at org.apache.hadoop.hbase.client.ClientScanner.call(ClientScanner.java:320)
        at org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:295)
        at org.apache.hadoop.hbase.client.ClientScanner.initializeScannerInConstruction(ClientScanner.java:160)
        at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:155)
        at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:867)
        at org.apache.hadoop.hbase.MetaTableAccessor.fullScan(MetaTableAccessor.java:602)
        at org.apache.hadoop.hbase.MetaTableAccessor.tableExists(MetaTableAccessor.java:366)
        at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:410)
        at demo.myconnection.createTable(myconnection.java:63)
        at demo.myconnection.main(myconnection.java:44)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.net.SocketTimeoutException: callTimeout=60000, callDuration=68266: row 'table1,' on table 'hbase:meta' at region=hbase:meta,,1.1588230740, hostname=slave03,60020,1484120818621, seqNum=0
        at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:159)
        at org.apache.hadoop.hbase.client.ResultBoundedCompletionService$QueueingFuture.run(ResultBoundedCompletionService.java:65)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: com.google.protobuf.ServiceException: java.lang.NoClassDefFoundError: com/yammer/metrics/core/Gauge
        at org.apache.hadoop.hbase.protobuf.ProtobufUtil.getRemoteException(ProtobufUtil.java:329)
        at org.apache.hadoop.hbase.client.ScannerCallable.openScanner(ScannerCallable.java:402)
        at org.apache.hadoop.hbase.client.ScannerCallable.call(ScannerCallable.java:203)
        at org.apache.hadoop.hbase.client.ScannerCallable.call(ScannerCallable.java:64)
        at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:200)
        at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas$RetryingRPC.call(ScannerCallableWithReplicas.java:360)
        at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas$RetryingRPC.call(ScannerCallableWithReplicas.java:334)
        at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:126)
        ... 4 more
Caused by: com.google.protobuf.ServiceException: java.lang.NoClassDefFoundError: com/yammer/metrics/core/Gauge
        at org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:239)
        at org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:331)
        at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$BlockingStub.scan(ClientProtos.java:34094)
        at org.apache.hadoop.hbase.client.ScannerCallable.openScanner(ScannerCallable.java:394)
        ... 10 more
Caused by: java.lang.NoClassDefFoundError: com/yammer/metrics/core/Gauge
        at org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:224)
        ... 13 more
Caused by: java.lang.ClassNotFoundException: com.yammer.metrics.core.Gauge
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        ... 14 more

3.Caused by: java.lang.NoClassDefFoundError: org/apache/htrace/Trace

Exception in thread "main" java.io.IOException: java.lang.reflect.InvocationTargetException
        at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:240)
        at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:218)
        at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:119)
        at demo.myconnection.main(myconnection.java:41)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        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:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:238)
        ... 9 more
Caused by: java.lang.NoClassDefFoundError: org/apache/htrace/Trace
        at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:217)
        at org.apache.hadoop.hbase.zookeeper.ZKUtil.checkExists(ZKUtil.java:419)
        at org.apache.hadoop.hbase.zookeeper.ZKClusterId.readClusterIdZNode(ZKClusterId.java:65)
        at org.apache.hadoop.hbase.client.ZooKeeperRegistry.getClusterId(ZooKeeperRegistry.java:105)
        at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.retrieveClusterId(ConnectionManager.java:919)
        at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.<init>(ConnectionManager.java:657)
        ... 14 more
Caused by: java.lang.ClassNotFoundException: org.apache.htrace.Trace

从根源来说，以上故障都是因为执行时找不到对应的hbase jar包引起的。

那么jar包在哪里呢？ 在hbase的classpath里面。（如：/usr/local/cdh/cloudera/parcels/CDH-5.8.0-1.cdh5.8.0.p0.42/lib/hbase/lib/*.jar）

那么解决思路有两条：

1. 手动copy缺失的jar包

         拷贝./hbase/lib/目录下的jar包，到./hadoop/lib/目录

         包括hbase*.jar,metrics*.jar.htrace*.jar

2. 设置classpath环境变量

执行

export HBASE_CLASSPATH=`hbase classpath`

export HADOOP_CLASSPATH=`hadoop classpath`

exportHADOOP_CLASSPATH=$HADOOP_CLASSPATH:$HBASE_CLASSPATH

推荐后者。

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