In almost all hadoop configurations, all host names can be specified as IP address. So, in your hadoop-site.xml, please specify the IP address of the namenode (instead of its hostname).
-dhruba 2008/8/8 Lucas Nazário dos Santos <[EMAIL PROTECTED]>: > Thanks Andreas. I'll try it. > > > On Fri, Aug 8, 2008 at 5:47 PM, Andreas Kostyrka <[EMAIL PROTECTED]>wrote: > >> On Friday 08 August 2008 15:43:46 Lucas Nazário dos Santos wrote: >> > You are completely right. It's not safe at all. But this is what I have >> for >> > now: >> > two computers distributed across the Internet. I would really appreciate >> if >> > anyone could give me spark on how to configure the namenode's IP in a >> > datanode. As I could identify in log files, the datanode keeps trying to >> > connect >> > to the IP 10.1.1.5, which is the internal IP of the namenode. I just >> need a >> > way >> > to say to the datanode "Hey, could you instead connect to the IP >> 172.1.23.2 >> > "? >> >> Your only bet is to set it up in a VPNed environment. That would make it >> securitywise okay too. >> >> Andreas >> >> > >> > Lucas >> > >> > On Fri, Aug 8, 2008 at 10:25 AM, Lukáš Vlček <[EMAIL PROTECTED]> >> wrote: >> > > HI, >> > > >> > > I am not an expert on Hadoop configuration but is this safe? As far as >> I >> > > understand the IP address is public and connection to the datanode port >> > > is not secured. Am I correct? >> > > >> > > Lukas >> > > >> > > On Fri, Aug 8, 2008 at 8:35 AM, Lucas Nazário dos Santos < >> > > >> > > [EMAIL PROTECTED]> wrote: >> > > > Hello again, >> > > > >> > > > In fact I can get the cluster up and running with two nodes in >> > > > different LANs. The problem appears when executing a job. >> > > > >> > > > As you can see in the piece of log bellow, the datanode tries to >> > > >> > > comunicate >> > > >> > > > with the namenode using the IP 10.1.1.5. The issue is that the >> datanode >> > > > should be using a valid IP, and not 10.1.1.5. >> > > > >> > > > Is there a way of manually configuring the datanode with the >> namenode's >> > > >> > > IP, >> > > >> > > > so I can change from 10.1.1.5 to, say 189.11.131.172? >> > > > >> > > > Thanks, >> > > > Lucas >> > > > >> > > > >> > > > 2008-08-08 02:34:23,335 INFO org.apache.hadoop.mapred.TaskTracker: >> > > > TaskTracker up at: localhost/127.0.0.1:60394 >> > > > 2008-08-08 02:34:23,335 INFO org.apache.hadoop.mapred.TaskTracker: >> > > >> > > Starting >> > > >> > > > tracker tracker_localhost:localhost/127.0.0.1:60394 >> > > > 2008-08-08 02:34:23,589 INFO org.apache.hadoop.mapred.TaskTracker: >> > > >> > > Starting >> > > >> > > > thread: Map-events fetcher for all reduce tasks on >> > > > tracker_localhost:localhost/127.0.0.1:60394 >> > > > 2008-08-08 03:06:43,239 INFO org.apache.hadoop.mapred.TaskTracker: >> > > > LaunchTaskAction: task_200808080234_0001_m_000000_0 >> > > > 2008-08-08 03:07:43,989 INFO org.apache.hadoop.ipc.Client: Retrying >> > > >> > > connect >> > > >> > > > to server: /10.1.1.5:9000. Already tried 1 time(s). >> > > > 2008-08-08 03:08:44,999 INFO org.apache.hadoop.ipc.Client: Retrying >> > > >> > > connect >> > > >> > > > to server: /10.1.1.5:9000. Already tried 2 time(s). >> > > > 2008-08-08 03:09:45,999 INFO org.apache.hadoop.ipc.Client: Retrying >> > > >> > > connect >> > > >> > > > to server: /10.1.1.5:9000. Already tried 3 time(s). >> > > > 2008-08-08 03:10:47,009 INFO org.apache.hadoop.ipc.Client: Retrying >> > > >> > > connect >> > > >> > > > to server: /10.1.1.5:9000. Already tried 4 time(s). >> > > > 2008-08-08 03:11:48,009 INFO org.apache.hadoop.ipc.Client: Retrying >> > > >> > > connect >> > > >> > > > to server: /10.1.1.5:9000. Already tried 5 time(s). >> > > > 2008-08-08 03:12:49,026 INFO org.apache.hadoop.ipc.Client: Retrying >> > > >> > > connect >> > > >> > > > to server: /10.1.1.5:9000. Already tried 6 time(s). >> > > > 2008-08-08 03:13:50,036 INFO org.apache.hadoop.ipc.Client: Retrying >> > > >> > > connect >> > > >> > > > to server: /10.1.1.5:9000. Already tried 7 time(s). >> > > > 2008-08-08 03:14:51,046 INFO org.apache.hadoop.ipc.Client: Retrying >> > > >> > > connect >> > > >> > > > to server: /10.1.1.5:9000. Already tried 8 time(s). >> > > > 2008-08-08 03:15:52,056 INFO org.apache.hadoop.ipc.Client: Retrying >> > > >> > > connect >> > > >> > > > to server: /10.1.1.5:9000. Already tried 9 time(s). >> > > > 2008-08-08 03:16:53,066 INFO org.apache.hadoop.ipc.Client: Retrying >> > > >> > > connect >> > > >> > > > to server: /10.1.1.5:9000. Already tried 10 time(s). >> > > > 2008-08-08 03:17:54,077 WARN org.apache.hadoop.mapred.TaskTracker: >> > > > Error initializing task_200808080234_0001_m_000000_0: >> > > > java.net.SocketTimeoutException >> > > > at sun.nio.ch.SocketAdaptor.connect(SocketAdaptor.java:109) >> > > > at >> > > > >> org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:174) >> > > > at org.apache.hadoop.ipc.Client.getConnection(Client.java:623) >> > > > at org.apache.hadoop.ipc.Client.call(Client.java:546) >> > > > at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:212) >> > > > at org.apache.hadoop.dfs.$Proxy5.getProtocolVersion(Unknown >> Source) >> > > > at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:313) >> > > > at >> > > >> > > org.apache.hadoop.dfs.DFSClient.createRPCNamenode(DFSClient.java:102) >> > > >> > > > at org.apache.hadoop.dfs.DFSClient.<init>(DFSClient.java:178) >> > > > at >> > > >> > > >> org.apache.hadoop.dfs.DistributedFileSystem.initialize(DistributedFileSys >> > >tem.java:68) >> > > >> > > > at >> > > > >> org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1280) >> > > > at org.apache.hadoop.fs.FileSystem.access$300(FileSystem.java:56) >> > > > at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1291) >> > > > at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:203) >> > > > at org.apache.hadoop.fs.FileSystem.getNamed(FileSystem.java:152) >> > > > at >> > > > >> org.apache.hadoop.mapred.TaskTracker.localizeJob(TaskTracker.java:670) >> > > > at >> > > > >> org.apache.hadoop.mapred.TaskTracker.startNewTask(TaskTracker.java:1274 >> > > >) at >> > > > >> org.apache.hadoop.mapred.TaskTracker.offerService(TaskTracker.java:915) >> > > > at org.apache.hadoop.mapred.TaskTracker.run(TaskTracker.java:1310) >> > > > at >> org.apache.hadoop.mapred.TaskTracker.main(TaskTracker.java:2251) >> > > > >> > > > >> > > > >> > > > On Fri, Aug 8, 2008 at 12:16 AM, Lucas Nazário dos Santos < >> > > > >> > > > [EMAIL PROTECTED]> wrote: >> > > > > Hello, >> > > > > >> > > > > Can someone point me out what are the extra tasks that need to be >> > > > >> > > > performed >> > > > >> > > > > in order to set up a cluster where nodes are spread over the >> > > > > Internet, >> > > >> > > in >> > > >> > > > > different LANs? >> > > > > >> > > > > Do I need to free any datanode/namenode ports? How do I get the >> > > >> > > datanodes >> > > >> > > > > to know the valid namenode IP, and not something like 10.1.1.1? >> > > > > >> > > > > Any help is appreciate. >> > > > > >> > > > > Lucas >> > > >> > > -- >> > > http://blog.lukas-vlcek.com/ >> >> >> >
