Hi Daniel,
The RM will list only NodeManagers and not the datanodes. You can view the
datanodes on the NameNode page (eg. 192.168.51.4:50070).
The one node you see on the RM page 'Nodes' list is from this:
hadoop@hadoop-master:~$ jps24641 SecondaryNameNode24435 DataNode24261
NameNode24791 ResourceManager25483 Jps24940 NodeManager <<<<<<<<<<
You might want NodeManagers and dataNodes to run on the same physical hosts in
most of the cases, AFAIK.
Hope this helps.Regards,Kuhu
On Wednesday, September 23, 2015 3:31 PM, Daniel Watrous
<dwmaill...@gmail.com> wrote:
I was able to get the jobs submitting to the cluster by adding the following
property to mapred-site.xml
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
I also had to add the following properties to yarn-site.xml
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<property>
<name>yarn.nodemanager.aux-services.mapreduce_shuffle.class</name>
<value>org.apache.hadoop.mapred.ShuffleHandler</value>
</property>
I'm still not sure why the datanodes don't show up in the nodes view. Is the
idea that a data node is only used for HDFS and yarn doesn't schedule jobs
there? If so, how can I add additional compute hosts? What are those called?
On Wed, Sep 23, 2015 at 3:08 PM, Daniel Watrous <dwmaill...@gmail.com> wrote:
I'm not sure if this is related, but I'm seeing some errors in
hadoop-hadoop-namenode-hadoop-master.log
2015-09-23 19:56:27,798 WARN
org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager: Unresolved
datanode registration: hostname cannot be resolved (ip=192.168.51.1,
hostname=192.168.51.1)
2015-09-23 19:56:27,800 INFO org.apache.hadoop.ipc.Server: IPC Server handler 6
on 54310, call
org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.registerDatanode from
192.168.51.1:54554 Call#373 Retry#0
org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException: Datanode
denied communication with namenode because hostname cannot be resolved
(ip=192.168.51.1, hostname=192.168.51.1): DatanodeRegistration(0.0.0.0:50010,
datanodeUuid=8a5d90c8-b909-46d3-80ec-2a3a8f1fe904, infoPort=50075,
infoSecurePort=0, ipcPort=50020,
storageInfo=lv=-56;cid=CID-bc60d031-11b0-4eb5-8f9b-da0f8a069ea6;nsid=1223814533;c=0)
at
org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager.registerDatanode(DatanodeManager.java:863)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.registerDatanode(FSNamesystem.java:4529)
at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.registerDatanode(NameNodeRpcServer.java:1279)
at
org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.registerDatanode(DatanodeProtocolServerSideTranslatorPB.java:95)
at
org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:28539)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)
I don't have a server with the IP 192.168.51.1 and I don't think I'm
referencing that anywhere. Is there some reason that it's trying to add that
host as a namenode?
On Wed, Sep 23, 2015 at 1:58 PM, Daniel Watrous <dwmaill...@gmail.com> wrote:
Hi,
I have deployed a multi-node cluster with one master and two data nodes. Here's
what jps shows:
hadoop@hadoop-master:~$ jps24641 SecondaryNameNode24435 DataNode24261
NameNode24791 ResourceManager25483 Jps24940 NodeManager
hadoop@hadoop-data1:~$ jps15556 DataNode16198 NodeManager16399 Jps
hadoop@hadoop-data2:~$ jps16418 Jps15575 DataNode16216 NodeManager
When I open the web console, I only see one node running:
http://screencast.com/t/E6yehRvUbt
Where are the other two nodes? Why don't they show up?
Next I run one of the example scripts
hadoop@hadoop-master:~$ hadoop jar
/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.1.jar pi
10 30Number of Maps = 10Samples per Map = 30Wrote input for Map #0
Wrote input for Map #1...Job Finished in 2.956 secondsEstimated value of Pi is
3.14146666666666666667
I can't see this anywhere in the web interface. I thought it might show in the
Applications sub-menu. Should I be able to see this? It appears to run
successfully.
Daniel
