Tried this one "https://stackoverflow.com/questions/36015864/hadoop-be-replicated-to-0-nodes-instead-of-minreplication-1-there-are-1/36310025?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa";
I only have 1 data node since is just for remote testing connection only. [https://cdn.sstatic.net/Sites/stackoverflow/img/[email protected]?v=73d79a89bded]<https://stackoverflow.com/questions/36015864/hadoop-be-replicated-to-0-nodes-instead-of-minreplication-1-there-are-1/36310025?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa> Hadoop: ...be replicated to 0 nodes instead of minReplication (=1). There are 1 datanode(s) running and no node(s) are excluded in this operation<https://stackoverflow.com/questions/36015864/hadoop-be-replicated-to-0-nodes-instead-of-minreplication-1-there-are-1/36310025?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa> stackoverflow.com I'm getting the following error when attempting to write to HDFS as part of my multi-threaded application could only be replicated to 0 nodes instead of minReplication (=1). There are 1 datanode(s) ________________________________ From: David Quiroga <[email protected]> Sent: Tuesday, May 1, 2018 3:35:47 AM To: Fadzly Zahari Cc: [email protected] Subject: Re: Premature EOF and RemoteException Which suggestion from stackoverflow was that? The warning states there aren't enough data nodes "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." How many data nodes should there be on the target? I have heard docker handles networking... in a interesting way... it might not register multiple data node addresses. minReplication = 1 would require at least two data nodes, one for primary and one for replica. On Thu, Apr 26, 2018 at 12:29 AM, Fadzly Zahari <[email protected]<mailto:[email protected]>> wrote: Hi, I created simple app to write parquet file into Hadoop. I am using hadoop lib version 2.6.0-cdh5.9.2 and Hadoop is hosted in a docker in my pc. Docker Hadoop: Version: 2.6.0-cdh5.7.0, rc00978c67b0d3fe9f3b896b5030741bd40bf541a I am able to run the application successfully when it is connected to localhost docker. But it throws exception when I tried to connect it to docker hosted in other pc. Details are as below: Apr 26 11:03:35: [INFO] DFSClient - Exception in createBlockOutputStream <java.io.EOFException: Premature EOF: no length prefix available>java.io<http://java.io>.EOFException: Premature EOF: no length prefix available Apr 26 11:03:35: at org.apache.hadoop.hdfs.protocolPB.PBHelper.vintPrefixed(PBHelper.java:2254) Apr 26 11:03:35: at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1700) Apr 26 11:03:35: at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1619) Apr 26 11:03:35: at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:771) Apr 26 11:03:35: Apr 26 11:03:35: [WARN] DFSClient - Abandoning BP-1388946040-10.0.0.8-1508802350597:blk_1073742841_2027 Apr 26 11:03:35: [WARN] DFSClient - Excluding datanode DatanodeInfoWithStorage[172.17.0.2:50010<http://172.17.0.2:50010>,DS-cbee6448-2551-4251-b79b-2980ec42eb6d,DISK] Apr 26 11:03:35: [WARN] DFSClient - DataStreamer Exception <org.apache.hadoop.ipc.RemoteException(java.io<http://java.io>.IOException): File /tmp/yay_avroToParquet/1524711795673_simple_udr_useAvroSchema_SNAPPY.parquet could only be replicated to 0 nodes instead of minReplication (=1). There are 1 datanode(s) running and 1 node(s) are excluded in this operation. Apr 26 11:03:35: at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1720) Apr 26 11:03:35: at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3440) Apr 26 11:03:35: at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:686) Apr 26 11:03:35: at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.addBlock(AuthorizationProviderProxyClientProtocol.java:217) Apr 26 11:03:35: at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:506) Apr 26 11:03:35: at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java) Apr 26 11:03:35: at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617) Apr 26 11:03:35: at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073) Apr 26 11:03:35: at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2226) Apr 26 11:03:35: at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2222) Apr 26 11:03:35: at java.security.AccessController.doPrivileged(Native Method) Apr 26 11:03:35: at javax.security.auth.Subject.doAs(Subject.java:415) Apr 26 11:03:35: at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1917) Apr 26 11:03:35: at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2220) Apr 26 11:03:35: >org.apache.hadoop.ipc.RemoteException(java.io<http://java.io>.IOException): File /tmp/yay_avroToParquet/1524711795673_simple_udr_useAvroSchema_SNAPPY.parquet could only be replicated to 0 nodes instead of minRe plication (=1). There are 1 datanode(s) running and 1 node(s) are excluded in this operation. Apr 26 11:03:35: at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1720) Apr 26 11:03:35: at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3440) Apr 26 11:03:35: at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:686) Apr 26 11:03:35: at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.addBlock(AuthorizationProviderProxyClientProtocol.java:217) Apr 26 11:03:35: at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:506) Apr 26 11:03:35: at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java) Apr 26 11:03:35: at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617) Apr 26 11:03:35: at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073) Apr 26 11:03:35: at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2226) Apr 26 11:03:35: at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2222) Apr 26 11:03:35: at java.security.AccessController.doPrivileged(Native Method) Apr 26 11:03:35: at javax.security.auth.Subject.doAs(Subject.java:415) Apr 26 11:03:35: at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1917) Apr 26 11:03:35: at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2220) Apr 26 11:03:35: Apr 26 11:03:35: at org.apache.hadoop.ipc.Client.call(Client.java:1472) Apr 26 11:03:35: at org.apache.hadoop.ipc.Client.call(Client.java:1409) Apr 26 11:03:35: at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:230) Apr 26 11:03:35: at com.sun.proxy.$Proxy61.addBlock(Unknown Source) Apr 26 11:03:35: at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:413) Apr 26 11:03:35: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) Apr 26 11:03:35: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) Apr 26 11:03:35: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) Apr 26 11:03:35: at java.lang.reflect.Method.invoke(Method.java:498) Apr 26 11:03:35: at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:256) Apr 26 11:03:35: at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:104) Apr 26 11:03:35: at com.sun.proxy.$Proxy62.addBlock(Unknown Source) Apr 26 11:03:35: at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1811) Apr 26 11:03:35: at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1607) Apr 26 11:03:35: at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:771) Apr 26 11:03:35: Does anyone know how to resolve it since I tried suggestion from stackoverflow as well and still have this error. Thanks Fadzly
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