执行插入

put 'mytable','first','cf:message','hello'

意外报错，

2017-04-14 06:36:36,102 WARN  [main] net.DNS: Unable to determine address of the host-falling back to "localhost" address
java.net.UnknownHostException: bogon: bogon: Temporary failure in name resolution
    at java.net.InetAddress.getLocalHost(InetAddress.java:1475)
    at org.apache.hadoop.net.DNS.resolveLocalHostIPAddress(DNS.java:287)
    at org.apache.hadoop.net.DNS.<clinit>(DNS.java:58)
    at org.apache.hadoop.hbase.client.ScannerCallable.<clinit>(ScannerCallable.java:90)
    at org.apache.hadoop.hbase.client.ClientSmallScanner$SmallScannerCallableFactory.getCallable(ClientSmallScanner.java:305)
    at org.apache.hadoop.hbase.client.ClientSmallReversedScanner.nextScanner(ClientSmallReversedScanner.java:167)
    at org.apache.hadoop.hbase.client.ClientSmallReversedScanner.loadCache(ClientSmallReversedScanner.java:205)
    at org.apache.hadoop.hbase.client.ClientSmallReversedScanner.next(ClientSmallReversedScanner.java:185)
    at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.locateRegionInMeta(ConnectionManager.java:1249)
    at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.locateRegion(ConnectionManager.java:1155)
    at org.apache.hadoop.hbase.client.AsyncProcess.submit(AsyncProcess.java:370)
    at org.apache.hadoop.hbase.client.AsyncProcess.submit(AsyncProcess.java:321)
    at org.apache.hadoop.hbase.client.BufferedMutatorImpl.backgroundFlushCommits(BufferedMutatorImpl.java:206)
    at org.apache.hadoop.hbase.client.BufferedMutatorImpl.flush(BufferedMutatorImpl.java:183)
    at org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:1425)
    at org.apache.hadoop.hbase.client.HTable.put(HTable.java:1018)
    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.jruby.javasupport.JavaMethod.invokeDirectWithExceptionHandling(JavaMethod.java:450)
    at org.jruby.javasupport.JavaMethod.invokeDirect(JavaMethod.java:311)
    at org.jruby.java.invokers.InstanceMethodInvoker.call(InstanceMethodInvoker.java:59)
    at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:312)
    at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:169)
    at org.jruby.ast.CallOneArgNode.interpret(CallOneArgNode.java:57)
    at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
    at org.jruby.ast.BlockNode.interpret(BlockNode.java:71)
    at org.jruby.evaluator.ASTInterpreter.INTERPRET_METHOD(ASTInterpreter.java:74)
    at org.jruby.internal.runtime.methods.InterpretedMethod.call(InterpretedMethod.java:120)
    at org.jruby.internal.runtime.methods.InterpretedMethod.call(InterpretedMethod.java:134)
    at org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:174)
    at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:282)
    at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:71)
    at org.jruby.ast.CallManyArgsNode.interpret(CallManyArgsNode.java:59)
    at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
    at org.jruby.evaluator.ASTInterpreter.INTERPRET_BLOCK(ASTInterpreter.java:111)
    at org.jruby.runtime.InterpretedBlock.evalBlockBody(InterpretedBlock.java:374)
    at org.jruby.runtime.InterpretedBlock.yield(InterpretedBlock.java:295)
    at org.jruby.runtime.InterpretedBlock.yieldSpecific(InterpretedBlock.java:229)
    at org.jruby.runtime.Block.yieldSpecific(Block.java:99)
    at org.jruby.ast.ZYieldNode.interpret(ZYieldNode.java:25)
    at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
    at org.jruby.ast.BlockNode.interpret(BlockNode.java:71)
    at org.jruby.evaluator.ASTInterpreter.INTERPRET_METHOD(ASTInterpreter.java:74)

猜想识别不了localhost

于是编辑 /etc/resolv.conf
添加了一行DNS的配置

localhost 127.0.0.1

ok 搞定