错误sequenceiq / hadoop-docker写入文件
写入文件时出错
试图将文件写入sequenceiq / hadoop-docker我不这样做。
部署一个docker集装箱sequenceiq / hadoop-docker，一切都会升起。 但是当我尝试写入文件时会出现错误
只能复制到0节点而不是minReplication（= 1）。 此操作中有1个数据节点正在运行，1个节点不在此范围内。
跑
docker run -it --rm --name=hadoopserver -p 8030:8030 -p 8040:8040 -p 8042:8042 -p 8088:8088 -p 19888:19888 -p 49707:49707 -p 50010:50010 -p 50020:50020 -p 50070:50070 -p 50075:50075 -p 50090:50090 -p 9000:9000 sequenceiq/hadoop-docker:latest /etc/bootstrap.sh –d 应用
public static void main(String[] args) throws IOException { Configuration conf = new Configuration(); conf.set("fs.defaultFS", "hdfs://localhost:9000"); System.setProperty("HADOOP_USER_NAME", "root"); System.setProperty("hadoop.home.dir", "/"); FileSystem fileSystem = FileSystem.get(conf); try (FSDataOutputStream out = fileSystem.create(new Path("test.txt"), true)) { out.write("Test".getBytes()); } }
错误
org.apache.hadoop.ipc.RemoteException: File /user/root/test.txt could only be replicated to 0 nodes instead of minReplication (=1). There are 1 datanode(s) running and 1 node(s) are excluded in this operation. at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1547) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(FSNamesystem.java:3107) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3031) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:724) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492) at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043) at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1481) at org.apache.hadoop.ipc.Client.call(Client.java:1427) at org.apache.hadoop.ipc.Client.call(Client.java:1337) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:227) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116) at com.sun.proxy.$Proxy13.addBlock(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:440) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:398) at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:163) at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:155) at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:335) at com.sun.proxy.$Proxy14.addBlock(Unknown Source) at org.apache.hadoop.hdfs.DataStreamer.locateFollowingBlock(DataStreamer.java:1733) at org.apache.hadoop.hdfs.DataStreamer.nextBlockOutputStream(DataStreamer.java:1536) at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:658)
我究竟做错了什么？
也许这不会是你的问题的海峡答案，但很简单，好的hadoop集群docker运行（在Linux上）的解释和字数统计植入。 这帮助我了解了很多。