java 操作上傳下載 HDFS:could only be replicated to 0 nodes instead of minReplication (=1). There are 1 da
阿新 • • 發佈:2019-01-07
環境
程式碼
//上傳檔案
public static void main(String[] args) throws Exception {
Configuration configuration = new Configuration();
//123.56.xxx.xxx 為阿里雲伺服器公網 IP
FileSystem fs = FileSystem.get(URI.create("hdfs://123.56.xxx.xxx:9000/text.txt"), configuration, "root");
InputStream in = new FileInputStream("D://hdfs_demo1/123.txt");
OutputStream outputStream = fs.create(new Path("hdfs://123.56.xxx.xxx:9000/text.txt"), new Progressable() {
public void progress() {
System.out.print(".");
}
});
IOUtils.copyBytes(in, outputStream, 4096 , true);
}
出現錯誤
Exception in thread "main" org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /text.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:1797)
at org.apache.hadoop.hdfs.server.namenode.FSDirWriteFileOp.chooseTargetForNewBlock(FSDirWriteFileOp.java:265)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:2559)
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:846)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:510)
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:503)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:989)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:868)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:814)
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:1886)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2603)
at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1493)
at org.apache.hadoop.ipc.Client.call(Client.java:1439)
at org.apache.hadoop.ipc.Client.call(Client.java:1349)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:227)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116)
at com.sun.proxy.$Proxy10.addBlock(Unknown Source)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:444)
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:497)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:422)
at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:165)
at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:157)
at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:359)
at com.sun.proxy.$Proxy11.addBlock(Unknown Source)
at org.apache.hadoop.hdfs.DataStreamer.locateFollowingBlock(DataStreamer.java:1845)
at org.apache.hadoop.hdfs.DataStreamer.nextBlockOutputStream(DataStreamer.java:1645)
at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:710)
解決方法
- 防火牆關閉(我沒有這個問題,但是很多人這個會影響)
- 新增
configuration.set("dfs.client.use.datanode.hostname", "true");
這句程式碼 - 如果下載也出現問題如
org.apache.hadoop.hdfs.BlockMissingException: Could not obtain block: BP-115793501-172.17.162.27-1512710701892:blk_1073741825_1001 file=/hdfs.xml
,確定排除網上其他什麼原因(datanode 沒有啟動之類的),也可以新增上面那行程式碼嘗試。