Java写文件至HDFS失败

Question

各位大牛：
本人在虚拟机上搭建了Hadoop环境，用的是伪cluster的模式搭建。通过Java调用Hadoop 的Api， 写文件至HDFS。
把写好的代码拿到部署Hadoop的虚拟机上能正常运行，成功写文件至HDFS，文件内容正常。但在我本地电脑，往虚拟机上的HDFS写文件时，文件创建成功，但往文件里写入内容一直失败，感觉是找不到可写的datanode, 不知道怎么配置，望各位大牛指点。错误代码如下：
org.apache.hadoop.ipc.RemoteException: File /canal/canal_1/canal_1-2020.3.25.txt could only be written to 0 of the 1 minReplication nodes. 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:2121)
at org.apache.hadoop.hdfs.server.namenode.FSDirWriteFileOp.chooseTargetForNewBlock(FSDirWriteFileOp.java:295)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:2702)
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:875)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:561)
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:523)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:991)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:872)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:818)
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:1729)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2678)

at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1511) ~[hadoop-common-3.1.2.jar:na]
at org.apache.hadoop.ipc.Client.call(Client.java:1457) ~[hadoop-common-3.1.2.jar:na]
at org.apache.hadoop.ipc.Client.call(Client.java:1367) ~[hadoop-common-3.1.2.jar:na]
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:228) ~[hadoop-common-3.1.2.jar:na]
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116) ~[hadoop-common-3.1.2.jar:na]
at com.sun.proxy.$Proxy123.addBlock(Unknown Source) ~[na:na]
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:510) ~[hadoop-hdfs-client-3.1.2.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_40]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_40]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_40]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_40]
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:422) ~[hadoop-common-3.1.2.jar:na]
at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:165) ~[hadoop-common-3.1.2.jar:na]
at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:157) ~[hadoop-common-3.1.2.jar:na]
at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95) ~[hadoop-common-3.1.2.jar:na]
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:359) ~[hadoop-common-3.1.2.jar:na]
at com.sun.proxy.$Proxy124.addBlock(Unknown Source) ~[na:na]
at org.apache.hadoop.hdfs.DFSOutputStream.addBlock(DFSOutputStream.java:1081) ~[hadoop-hdfs-client-3.1.2.jar:na]
at org.apache.hadoop.hdfs.DataStreamer.locateFollowingBlock(DataStreamer.java:1866) ~[hadoop-hdfs-client-3.1.2.jar:na]
at org.apache.hadoop.hdfs.DataStreamer.nextBlockOutputStream(DataStreamer.java:1668) ~[hadoop-hdfs-client-3.1.2.jar:na]
at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:716) ~[hadoop-hdfs-client-3.1.2.jar:na]

Answer 1

已解决，是replication 的配置问题。