0.0.0.0 means that the call is going to all interfaces on the machine. (Shouldn't be an issue...)
IPv4 vs IPv6? Could be an issue, however OP says he can write data to DNs and they seem to communicate, therefore if its IPv6 related, wouldn't it impact all traffic and not just a specific port? I agree... shut down IPv6 if you can. I don't disagree with your assessment. I am just suggesting that before you do a really deep dive, you think about the more obvious stuff first. There are a couple of other things... like do all of the /etc/hosts files on all of the machines match? Is the OP using both /etc/hosts and DNS? If so, are they in sync? BTW, you said DNS in your response. if you're using DNS, then you don't really want to have much info in the /etc/hosts file except loopback and the server's IP address. Looking at the problem OP is indicating some traffic works, while other traffic doesn't. Most likely something is blocking the ports. Iptables is the first place to look. Just saying. ;-) On Aug 13, 2012, at 9:12 AM, Mohammad Tariq <[email protected]> wrote: > Hi Michael, > I asked for hosts file because there seems to be some loopback prob to > me. The log shows that call is going at 0.0.0.0. Apart from what you have > said, I think disabling IPv6 and making sure that there is no prob with the > DNS resolution is also necessary. Please correct me if I am wrong. Thank you. > > Regards, > Mohammad Tariq > > > > On Mon, Aug 13, 2012 at 7:06 PM, Michael Segel <[email protected]> > wrote: > Based on your /etc/hosts output, why aren't you using DNS? > > Outside of MapR, multihomed machines can be problematic. Hadoop doesn't > generally work well when you're not using the FQDN or its alias. > > The issue isn't the SSH, but if you go to the node which is having trouble > connecting to another node, then try to ping it, or some other general > communication, if it succeeds, your issue is that the port you're trying to > communicate with is blocked. Then its more than likely an ipconfig or > firewall issue. > > On Aug 13, 2012, at 8:17 AM, Björn-Elmar Macek <[email protected]> wrote: > >> Hi Michael, >> >> well i can ssh from any node to any other without being prompted. The reason >> for this is, that my home dir is mounted in every server in the cluster. >> >> If the machines are multihomed: i dont know. i could ask if this would be of >> importance. >> >> Shall i? >> >> Regards, >> Elmar >> >> Am 13.08.12 14:59, schrieb Michael Segel: >>> If the nodes can communicate and distribute data, then the odds are that >>> the issue isn't going to be in his /etc/hosts. >>> >>> A more relevant question is if he's running a firewall on each of these >>> machines? >>> >>> A simple test... ssh to one node, ping other nodes and the control nodes at >>> random to see if they can see one another. Then check to see if there is a >>> firewall running which would limit the types of traffic between nodes. >>> >>> One other side note... are these machines multi-homed? >>> >>> On Aug 13, 2012, at 7:51 AM, Mohammad Tariq <[email protected]> wrote: >>> >>>> Hello there, >>>> >>>> Could you please share your /etc/hosts file, if you don't mind. >>>> >>>> Regards, >>>> Mohammad Tariq >>>> >>>> >>>> >>>> On Mon, Aug 13, 2012 at 6:01 PM, Björn-Elmar Macek >>>> <[email protected]> wrote: >>>> Hi, >>>> >>>> i am currently trying to run my hadoop program on a cluster. Sadly though >>>> my datanodes and tasktrackers seem to have difficulties with their >>>> communication as their logs say: >>>> * Some datanodes and tasktrackers seem to have portproblems of some kind >>>> as it can be seen in the logs below. I wondered if this might be due to >>>> reasons correllated with the localhost entry in /etc/hosts as you can read >>>> in alot of posts with similar errors, but i checked the file neither >>>> localhost nor 127.0.0.1/127.0.1.1 is bound there. (although you can ping >>>> localhost... the technician of the cluster said he'd be looking for the >>>> mechanics resolving localhost) >>>> * The other nodes can not speak with the namenode and jobtracker >>>> (its-cs131). Although it is absolutely not clear, why this is happening: >>>> the "dfs -put" i do directly before the job is running fine, which seems >>>> to imply that communication between those servers is working flawlessly. >>>> >>>> Is there any reason why this might happen? >>>> >>>> >>>> Regards, >>>> Elmar >>>> >>>> LOGS BELOW: >>>> >>>> \____Datanodes >>>> >>>> After successfully putting the data to hdfs (at this point i thought >>>> namenode and datanodes have to communicate), i get the following errors >>>> when starting the job: >>>> >>>> There are 2 kinds of logs i found: the first one is big (about 12MB) and >>>> looks like this: >>>> ############################### LOG TYPE 1 >>>> ############################################################ >>>> 2012-08-13 08:23:27,331 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 0 time(s). >>>> 2012-08-13 08:23:28,332 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 1 time(s). >>>> 2012-08-13 08:23:29,332 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 2 time(s). >>>> 2012-08-13 08:23:30,332 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 3 time(s). >>>> 2012-08-13 08:23:31,333 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 4 time(s). >>>> 2012-08-13 08:23:32,333 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 5 time(s). >>>> 2012-08-13 08:23:33,334 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 6 time(s). >>>> 2012-08-13 08:23:34,334 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 7 time(s). >>>> 2012-08-13 08:23:35,334 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 8 time(s). >>>> 2012-08-13 08:23:36,335 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 9 time(s). >>>> 2012-08-13 08:23:36,335 WARN >>>> org.apache.hadoop.hdfs.server.datanode.DataNode: >>>> java.net.ConnectException: Call to its-cs131/141.51.205.41:35554 failed on >>>> connection exception: java.net.ConnectException: Connection refused >>>> at org.apache.hadoop.ipc.Client.wrapException(Client.java:1095) >>>> at org.apache.hadoop.ipc.Client.call(Client.java:1071) >>>> at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225) >>>> at $Proxy5.sendHeartbeat(Unknown Source) >>>> at >>>> org.apache.hadoop.hdfs.server.datanode.DataNode.offerService(DataNode.java:904) >>>> at >>>> org.apache.hadoop.hdfs.server.datanode.DataNode.run(DataNode.java:1458) >>>> at java.lang.Thread.run(Thread.java:619) >>>> Caused by: java.net.ConnectException: Connection refused >>>> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) >>>> at >>>> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574) >>>> at >>>> org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206) >>>> at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:489) >>>> at >>>> org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:434) >>>> at >>>> org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:560) >>>> at org.apache.hadoop.ipc.Client$Connection.access$2000(Client.java:184) >>>> at org.apache.hadoop.ipc.Client.getConnection(Client.java:1202) >>>> at org.apache.hadoop.ipc.Client.call(Client.java:1046) >>>> ... 5 more >>>> >>>> ... (this continues til the end of the log) >>>> >>>> The second is short kind: >>>> ########################### LOG TYPE 2 >>>> ############################################################ >>>> 2012-08-13 00:59:19,038 INFO >>>> org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG: >>>> /************************************************************ >>>> STARTUP_MSG: Starting DataNode >>>> STARTUP_MSG: host = its-cs133.its.uni-kassel.de/141.51.205.43 >>>> STARTUP_MSG: args = [] >>>> STARTUP_MSG: version = 1.0.2 >>>> STARTUP_MSG: build = >>>> https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.0.2 -r >>>> 1304954; compiled by 'hortonfo' on Sat Mar 24 23:58:21 UTC 2012 >>>> ************************************************************/ >>>> 2012-08-13 00:59:19,203 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from >>>> hadoop-metrics2.properties >>>> 2012-08-13 00:59:19,216 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source >>>> MetricsSystem,sub=Stats registered. >>>> 2012-08-13 00:59:19,217 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot >>>> period at 10 second(s). >>>> 2012-08-13 00:59:19,218 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system >>>> started >>>> 2012-08-13 00:59:19,306 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi >>>> registered. >>>> 2012-08-13 00:59:19,346 INFO org.apache.hadoop.util.NativeCodeLoader: >>>> Loaded the native-hadoop library >>>> 2012-08-13 00:59:20,482 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35554. Already tried 0 time(s). >>>> 2012-08-13 00:59:21,584 INFO org.apache.hadoop.hdfs.server.common.Storage: >>>> Storage directory /home/work/bmacek/hadoop/hdfs/slave is not formatted. >>>> 2012-08-13 00:59:21,584 INFO org.apache.hadoop.hdfs.server.common.Storage: >>>> Formatting ... >>>> 2012-08-13 00:59:21,787 INFO >>>> org.apache.hadoop.hdfs.server.datanode.DataNode: Registered >>>> FSDatasetStatusMBean >>>> 2012-08-13 00:59:21,897 INFO >>>> org.apache.hadoop.hdfs.server.datanode.FSDatasetAsyncDiskService: Shutting >>>> down all async disk service threads... >>>> 2012-08-13 00:59:21,897 INFO >>>> org.apache.hadoop.hdfs.server.datanode.FSDatasetAsyncDiskService: All >>>> async disk service threads have been shut down. >>>> 2012-08-13 00:59:21,898 ERROR >>>> org.apache.hadoop.hdfs.server.datanode.DataNode: java.net.BindException: >>>> Problem binding to /0.0.0.0:50010 : Address already in use >>>> at org.apache.hadoop.ipc.Server.bind(Server.java:227) >>>> at >>>> org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:404) >>>> at >>>> org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:299) >>>> at >>>> org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1582) >>>> at >>>> org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1521) >>>> at >>>> org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1539) >>>> at >>>> org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1665) >>>> at >>>> org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1682) >>>> Caused by: java.net.BindException: Address already in use >>>> at sun.nio.ch.Net.bind(Native Method) >>>> at >>>> sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119) >>>> at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59) >>>> at org.apache.hadoop.ipc.Server.bind(Server.java:225) >>>> ... 7 more >>>> >>>> 2012-08-13 00:59:21,899 INFO >>>> org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: >>>> /************************************************************ >>>> SHUTDOWN_MSG: Shutting down DataNode at >>>> its-cs133.its.uni-kassel.de/141.51.205.43 >>>> ************************************************************/ >>>> >>>> >>>> >>>> >>>> >>>> \_____TastTracker >>>> With TaskTrackers it is the same: there are 2 kinds. >>>> ############################### LOG TYPE 1 >>>> ############################################################ >>>> 2012-08-13 02:09:54,645 INFO org.apache.hadoop.mapred.TaskTracker: >>>> Resending 'status' to 'its-cs131' with reponseId '879 >>>> 2012-08-13 02:09:55,646 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 0 time(s). >>>> 2012-08-13 02:09:56,646 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 1 time(s). >>>> 2012-08-13 02:09:57,647 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 2 time(s). >>>> 2012-08-13 02:09:58,647 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 3 time(s). >>>> 2012-08-13 02:09:59,648 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 4 time(s). >>>> 2012-08-13 02:10:00,648 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 5 time(s). >>>> 2012-08-13 02:10:01,649 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 6 time(s). >>>> 2012-08-13 02:10:02,649 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 7 time(s). >>>> 2012-08-13 02:10:03,650 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 8 time(s). >>>> 2012-08-13 02:10:04,650 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 9 time(s). >>>> 2012-08-13 02:10:04,651 ERROR org.apache.hadoop.mapred.TaskTracker: Caught >>>> exception: java.net.ConnectException: Call to >>>> its-cs131/141.51.205.41:35555 failed on connection exception: >>>> java.net.ConnectException: Connection refused >>>> at org.apache.hadoop.ipc.Client.wrapException(Client.java:1095) >>>> at org.apache.hadoop.ipc.Client.call(Client.java:1071) >>>> at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225) >>>> at org.apache.hadoop.mapred.$Proxy5.heartbeat(Unknown Source) >>>> at >>>> org.apache.hadoop.mapred.TaskTracker.transmitHeartBeat(TaskTracker.java:1857) >>>> at >>>> org.apache.hadoop.mapred.TaskTracker.offerService(TaskTracker.java:1653) >>>> at org.apache.hadoop.mapred.TaskTracker.run(TaskTracker.java:2503) >>>> at org.apache.hadoop.mapred.TaskTracker.main(TaskTracker.java:3744) >>>> Caused by: java.net.ConnectException: Connection refused >>>> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) >>>> at >>>> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574) >>>> at >>>> org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206) >>>> at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:489) >>>> at >>>> org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:434) >>>> at >>>> org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:560) >>>> at org.apache.hadoop.ipc.Client$Connection.access$2000(Client.java:184) >>>> at org.apache.hadoop.ipc.Client.getConnection(Client.java:1202) >>>> at org.apache.hadoop.ipc.Client.call(Client.java:1046) >>>> ... 6 more >>>> >>>> >>>> ########################### LOG TYPE 2 >>>> ############################################################ >>>> 2012-08-13 00:59:24,376 INFO org.apache.hadoop.mapred.TaskTracker: >>>> STARTUP_MSG: >>>> /************************************************************ >>>> STARTUP_MSG: Starting TaskTracker >>>> STARTUP_MSG: host = its-cs133.its.uni-kassel.de/141.51.205.43 >>>> STARTUP_MSG: args = [] >>>> STARTUP_MSG: version = 1.0.2 >>>> STARTUP_MSG: build = >>>> https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.0.2 -r >>>> 1304954; compiled by 'hortonfo' on Sat Mar 24 23:58:21 UTC 2012 >>>> ************************************************************/ >>>> 2012-08-13 00:59:24,569 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from >>>> hadoop-metrics2.properties >>>> 2012-08-13 00:59:24,626 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source >>>> MetricsSystem,sub=Stats registered. >>>> 2012-08-13 00:59:24,627 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot >>>> period at 10 second(s). >>>> 2012-08-13 00:59:24,627 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: TaskTracker metrics >>>> system started >>>> 2012-08-13 00:59:24,950 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi >>>> registered. >>>> 2012-08-13 00:59:25,146 INFO org.mortbay.log: Logging to >>>> org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via >>>> org.mortbay.log.Slf4jLog >>>> 2012-08-13 00:59:25,206 INFO org.apache.hadoop.http.HttpServer: Added >>>> global filtersafety >>>> (class=org.apache.hadoop.http.HttpServer$QuotingInputFilter) >>>> 2012-08-13 00:59:25,232 INFO org.apache.hadoop.mapred.TaskLogsTruncater: >>>> Initializing logs' truncater with mapRetainSize=-1 and reduceRetainSize=-1 >>>> 2012-08-13 00:59:25,237 INFO org.apache.hadoop.mapred.TaskTracker: >>>> Starting tasktracker with owner as bmacek >>>> 2012-08-13 00:59:25,239 INFO org.apache.hadoop.mapred.TaskTracker: Good >>>> mapred local directories are: >>>> /home/work/bmacek/hadoop/hdfs/tmp/mapred/local >>>> 2012-08-13 00:59:25,244 INFO org.apache.hadoop.util.NativeCodeLoader: >>>> Loaded the native-hadoop library >>>> 2012-08-13 00:59:25,255 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source jvm >>>> registered. >>>> 2012-08-13 00:59:25,256 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source >>>> TaskTrackerMetrics registered. >>>> 2012-08-13 00:59:25,279 INFO org.apache.hadoop.ipc.Server: Starting >>>> SocketReader >>>> 2012-08-13 00:59:25,282 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source >>>> RpcDetailedActivityForPort54850 registered. >>>> 2012-08-13 00:59:25,282 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source >>>> RpcActivityForPort54850 registered. >>>> 2012-08-13 00:59:25,287 INFO org.apache.hadoop.ipc.Server: IPC Server >>>> Responder: starting >>>> 2012-08-13 00:59:25,288 INFO org.apache.hadoop.ipc.Server: IPC Server >>>> listener on 54850: starting >>>> 2012-08-13 00:59:25,288 INFO org.apache.hadoop.ipc.Server: IPC Server >>>> handler 0 on 54850: starting >>>> 2012-08-13 00:59:25,288 INFO org.apache.hadoop.ipc.Server: IPC Server >>>> handler 1 on 54850: starting >>>> 2012-08-13 00:59:25,289 INFO org.apache.hadoop.mapred.TaskTracker: >>>> TaskTracker up at: localhost/127.0.0.1:54850 >>>> 2012-08-13 00:59:25,289 INFO org.apache.hadoop.ipc.Server: IPC Server >>>> handler 3 on 54850: starting >>>> 2012-08-13 00:59:25,289 INFO org.apache.hadoop.ipc.Server: IPC Server >>>> handler 2 on 54850: starting >>>> 2012-08-13 00:59:25,289 INFO org.apache.hadoop.mapred.TaskTracker: >>>> Starting tracker >>>> tracker_its-cs133.its.uni-kassel.de:localhost/127.0.0.1:54850 >>>> 2012-08-13 00:59:26,321 INFO org.apache.hadoop.ipc.Client: Retrying >>>> connect to server: its-cs131/141.51.205.41:35555. Already tried 0 time(s). >>>> 2012-08-13 00:59:38,104 INFO org.apache.hadoop.mapred.TaskTracker: >>>> Starting thread: Map-events fetcher for all reduce tasks on >>>> tracker_its-cs133.its.uni-kassel.de:localhost/127.0.0.1:54850 >>>> 2012-08-13 00:59:38,120 INFO org.apache.hadoop.util.ProcessTree: setsid >>>> exited with exit code 0 >>>> 2012-08-13 00:59:38,134 INFO org.apache.hadoop.mapred.TaskTracker: Using >>>> ResourceCalculatorPlugin : >>>> org.apache.hadoop.util.LinuxResourceCalculatorPlugin@445e228 >>>> 2012-08-13 00:59:38,137 WARN org.apache.hadoop.mapred.TaskTracker: >>>> TaskTracker's totalMemoryAllottedForTasks is -1. TaskMemoryManager is >>>> disabled. >>>> 2012-08-13 00:59:38,145 INFO org.apache.hadoop.mapred.IndexCache: >>>> IndexCache created with max memory = 10485760 >>>> 2012-08-13 00:59:38,158 INFO >>>> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source >>>> ShuffleServerMetrics registered. >>>> 2012-08-13 00:59:38,161 INFO org.apache.hadoop.http.HttpServer: Port >>>> returned by webServer.getConnectors()[0].getLocalPort() before open() is >>>> -1. Opening the listener on 50060 >>>> 2012-08-13 00:59:38,161 ERROR org.apache.hadoop.mapred.TaskTracker: Can >>>> not start task tracker because java.net.BindException: Address already in >>>> use >>>> at sun.nio.ch.Net.bind(Native Method) >>>> at >>>> sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119) >>>> at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59) >>>> at >>>> org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:216) >>>> at org.apache.hadoop.http.HttpServer.start(HttpServer.java:581) >>>> at org.apache.hadoop.mapred.TaskTracker.<init>(TaskTracker.java:1502) >>>> at org.apache.hadoop.mapred.TaskTracker.main(TaskTracker.java:3742) >>>> >>>> 2012-08-13 00:59:38,163 INFO org.apache.hadoop.mapred.TaskTracker: >>>> SHUTDOWN_MSG: >>>> /************************************************************ >>>> SHUTDOWN_MSG: Shutting down TaskTracker at >>>> its-cs133.its.uni-kassel.de/141.51.205.43 >>>> ************************************************************/ >>>> >>> >> > >
