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java.net.ConnectException: Call From slaver1/192.168.19.128 to slaver1:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org

1：练习spark的时候，操作大概如我读取hdfs上面的文件，然后spark懒加载以后，我读取详细信息出现如下所示的错误，错误虽然不大，我感觉有必要记录一下，因为错误的起因是对命令的不熟悉造成的，错误如下所示：

复制代码
  1 scala> text.collect
  2 java.net.ConnectException: Call From slaver1/192.168.19.128 to slaver1:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused
  3     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  4     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
  5     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  6     at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
  7     at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791)
  8     at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:731)
  9     at org.apache.hadoop.ipc.Client.call(Client.java:1472)
 10     at org.apache.hadoop.ipc.Client.call(Client.java:1399)
 11     at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)
 12     at com.sun.proxy.$Proxy36.getFileInfo(Unknown Source)
 13     at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:752)
 14     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 15     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 16     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 17     at java.lang.reflect.Method.invoke(Method.java:606)
 18     at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)
 19     at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
 20     at com.sun.proxy.$Proxy37.getFileInfo(Unknown Source)
 21     at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1988)
 22     at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1118)
 23     at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1114)
 24     at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
 25     at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1114)
 26     at org.apache.hadoop.fs.Globber.getFileStatus(Globber.java:57)
 27     at org.apache.hadoop.fs.Globber.glob(Globber.java:252)
 28     at org.apache.hadoop.fs.FileSystem.globStatus(FileSystem.java:1644)
 29     at org.apache.hadoop.mapred.FileInputFormat.singleThreadedListStatus(FileInputFormat.java:257)
 30     at org.apache.hadoop.mapred.FileInputFormat.listStatus(FileInputFormat.java:228)
 31     at org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:313)
 32     at org.apache.spark.rdd.HadoopRDD.getPartitions(HadoopRDD.scala:199)
 33     at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:239)
 34     at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:237)
 35     at scala.Option.getOrElse(Option.scala:120)
 36     at org.apache.spark.rdd.RDD.partitions(RDD.scala:237)
 37     at org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:35)
 38     at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:239)
 39     at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:237)
 40     at scala.Option.getOrElse(Option.scala:120)
 41     at org.apache.spark.rdd.RDD.partitions(RDD.scala:237)
 42     at org.apache.spark.SparkContext.runJob(SparkContext.scala:1929)
 43     at org.apache.spark.rdd.RDD$$anonfun$collect$1.apply(RDD.scala:927)
 44     at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:150)
 45     at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:111)
 46     at org.apache.spark.rdd.RDD.withScope(RDD.scala:316)
 47     at org.apache.spark.rdd.RDD.collect(RDD.scala:926)
 48     at $iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:30)
 49     at $iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:35)
 50     at $iwC$$iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:37)
 51     at $iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:39)
 52     at $iwC$$iwC$$iwC$$iwC.<init>(<console>:41)
 53     at $iwC$$iwC$$iwC.<init>(<console>:43)
 54     at $iwC$$iwC.<init>(<console>:45)
 55     at $iwC.<init>(<console>:47)
 56     at <init>(<console>:49)
 57     at .<init>(<console>:53)
 58     at .<clinit>(<console>)
 59     at .<init>(<console>:7)
 60     at .<clinit>(<console>)
 61     at $print(<console>)
 62     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 63     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 64     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 65     at java.lang.reflect.Method.invoke(Method.java:606)
 66     at org.apache.spark.repl.SparkIMain$ReadEvalPrint.call(SparkIMain.scala:1065)
 67     at org.apache.spark.repl.SparkIMain$Request.loadAndRun(SparkIMain.scala:1346)
 68     at org.apache.spark.repl.SparkIMain.loadAndRunReq$1(SparkIMain.scala:840)
 69     at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:871)
 70     at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:819)
 71     at org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:857)
 72     at org.apache.spark.repl.SparkILoop.interpretStartingWith(SparkILoop.scala:902)
 73     at org.apache.spark.repl.SparkILoop.command(SparkILoop.scala:814)
 74     at org.apache.spark.repl.SparkILoop.processLine$1(SparkILoop.scala:657)
 75     at org.apache.spark.repl.SparkILoop.innerLoop$1(SparkILoop.scala:665)
 76     at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$loop(SparkILoop.scala:670)
 77     at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$process$1.apply$mcZ$sp(SparkILoop.scala:997)
 78     at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$process$1.apply(SparkILoop.scala:945)
 79     at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$process$1.apply(SparkILoop.scala:945)
 80     at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:135)
 81     at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$process(SparkILoop.scala:945)
 82     at org.apache.spark.repl.SparkILoop.process(SparkILoop.scala:1059)
 83     at org.apache.spark.repl.Main$.main(Main.scala:31)
 84     at org.apache.spark.repl.Main.main(Main.scala)
 85     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 86     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 87     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 88     at java.lang.reflect.Method.invoke(Method.java:606)
 89     at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:731)
 90     at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:181)
 91     at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:206)
 92     at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:121)
 93     at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
 94 Caused by: java.net.ConnectException: Connection refused
 95     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
 96     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)
 97     at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
 98     at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:530)
 99     at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:494)
100     at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:607)
101     at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:705)
102     at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:368)
103     at org.apache.hadoop.ipc.Client.getConnection(Client.java:1521)
104     at org.apache.hadoop.ipc.Client.call(Client.java:1438)
105     ... 84 more
复制代码

 2：错误原因如下所示：

我使用了如下所示命令来读取hdfs上面的文件，scala> var text = sc.textFile("hdfs://slaver1:/input.txt");，然后使用text.collect命令来查看详细信息，就是查看详细信息的时候报的上面的错误，错误原因是因为我读取hdfs文件的时候少了端口号，造成的错误；

修改为如下所示即可：

scala> var text = sc.textFile("hdfs://slaver1:9000/input.txt");
scala> text.collect

 

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