Hi, which one is the slave configuration file? You mean /etc/hadoop/conf/slaves? This one contains the hostnames. I also checked the configuration option you pointed to in your previous emails links. Everything is set there accordingly.
Ingo Von: Arpit Agarwal [mailto:[email protected]] Gesendet: Mittwoch, 21. Januar 2015 05:22 An: [email protected] Betreff: Re: multihoming cluster Also the log message you pointed out is somewhat misleading. The actual connection attempt will respect dfs.client.use.datanode.hostname. In createSocketForPipeline: static Socket createSocketForPipeline(final DatanodeInfo first, final int length, final DFSClient client) throws IOException { final String dnAddr = first.getXferAddr( client.getConf().connectToDnViaHostname); if (DFSClient.LOG.isDebugEnabled()) { DFSClient.LOG.debug("Connecting to datanode " + dnAddr); } final InetSocketAddress isa = NetUtils.createSocketAddr(dnAddr); The useful log message is this one: 15/01/19 13:51:11 DEBUG hdfs.DFSClient: Connecting to datanode 10.x.x.13:50010 A quick guess is that the slaves configuration file on your NN has 10.x IP addresses instead of hostnames. On Tue, Jan 20, 2015 at 7:49 PM, Arpit Agarwal <[email protected]<mailto:[email protected]>> wrote: Hi Ingo, HDFS requires some extra configuration for multihoming. These settings are documented at: https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/HdfsMultihoming.html I am not sure all these settings were supported prior to Apache Hadoop 2.4. I recommend using 2.6 if you can. Arpit On Mon, Jan 19, 2015 at 11:56 PM, Thon, Ingo <[email protected]<mailto:[email protected]>> wrote: Dear List, I’m using Hadoop in a Multi-homed environment. Basically the Namenode, and Datanodes are connected via a special network for datatransfer 10.xxx.xxx.xxx. I installed the Hadoop tool on a computer which can access the nodes in the hadoop cluster via a second network 192.168.xxx.xxx . I want to use this computer to copy data into HDFS. However, all operations which try to copy data directly onto the datanodes are failing. Basically I can do ls, mkdir and even copy empty files, however, commands like: hadoop fs -put d:/temp/* hdfs://192.168.<namenode>/user/<me>/to_load/ are failing. As you can see in the hadoop tool output below the client is trying to access the datanodes via the IP addresses from the datatransfer network and not via the public second network. The strange thing in the configuration files on the namenode the parameter dfs.client.use.datanode.hostname is set to true. From my untestanding I, therefore, shouldn’t see the logline 15/01/19 13:51:11 DEBUG hdfs.DFSClient: pipeline = 10.x.x.13:50010 At all thanks in advance, Ingo Thon Output from hadoop command 15/01/19 13:51:11 DEBUG ipc.Client: IPC Client (7749777) connection to /192.168.xxx.xxx:8020 from me sending #12 15/01/19 13:51:11 DEBUG ipc.Client: IPC Client (7749777) connection to /192.168.xxx.xxx:8020 from thon_i got value #12 15/01/19 13:51:11 DEBUG ipc.ProtobufRpcEngine: Call: addBlock took 0ms 15/01/19 13:51:11 DEBUG hdfs.DFSClient: pipeline = 10.x.x.13:50010 15/01/19 13:51:11 DEBUG hdfs.DFSClient: Connecting to datanode 10.x.x.13:50010 15/01/19 13:51:21 DEBUG ipc.Client: IPC Client (7749777) connection to /192.168.xxx.xxx:8020 from thon_i: closed 15/01/19 13:51:21 DEBUG ipc.Client: IPC Client (7749777) connection to /192.168.xxx.xxx:8020 from thon_i: stopped, remaining connections 0 15/01/19 13:51:32 INFO hdfs.DFSClient: Exception in createBlockOutputStream java.net.ConnectException: Connection timed out: no further information at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source) at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206) at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:529) at org.apache.hadoop.hdfs.DFSOutputStream.createSocketForPipeline(DFSOutputStream.java:1526) at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1328) at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1281) at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:526) 15/01/19 13:51:32 INFO hdfs.DFSClient: Abandoning BP-20yyyyyyy26-10.x.x.x-1415yyyyy790:blk_1074387723_646941 15/01/19 13:51:32 DEBUG ipc.Client: The ping interval is 60000 ms. CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
