Hello,
I've just installed a minimal fully distributed hadoop pool with two
servers: a master (democrito) and a slave (pascal). The master runs on
port 24000. All firewalls are down, ssh passphraseless is ok, nothing in
the hosts.allow/hosts.deny. Configuration files are the following (resp.
on the master and on the slave):
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>fs.default.name</name>
<value>democrito:24000</value>
</property>
<property>
<name>mapred.job.tracker</name>
<value>democrito:24001</value>
</property>
<property>
<name>dfs.replication</name>
<value>2</value>
</property>
</configuration>
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://democrito:24000</value>
</property>
<property>
<name>mapred.job.tracker</name>
<value>democrito:24001</value>
</property>
<property>
<name>dfs.replication</name>
<value>2</value>
</property>
</configuration>
I've got "connection refused " problems when the slave tries to connect
to the master in the bootstrap phase:
2008-10-28 16:18:35,228 INFO org.apache.hadoop.ipc.Client: Retrying
connect to server: democrito/10.2.6.187:24000. Already tried 0 time(s).
2008-10-28 16:18:36,231 INFO org.apache.hadoop.ipc.Client: Retrying
connect to server: democrito/10.2.6.187:24000. Already tried 1 time(s).
2008-10-28 16:18:37,233 INFO org.apache.hadoop.ipc.Client: Retrying
connect to server: democrito/10.2.6.187:24000. Already tried 2 time(s).
2008-10-28 16:18:38,235 INFO org.apache.hadoop.ipc.Client: Retrying
connect to server: democrito/10.2.6.187:24000. Already tried 3 time(s).
2008-10-28 16:18:39,238 INFO org.apache.hadoop.ipc.Client: Retrying
connect to server: democrito/10.2.6.187:24000. Already tried 4 time(s).
2008-10-28 16:18:40,241 INFO org.apache.hadoop.ipc.Client: Retrying
connect to server: democrito/10.2.6.187:24000. Already tried 5 time(s).
2008-10-28 16:18:41,244 INFO org.apache.hadoop.ipc.Client: Retrying
connect to server: democrito/10.2.6.187:24000. Already tried 6 time(s).
2008-10-28 16:18:42,246 INFO org.apache.hadoop.ipc.Client: Retrying
connect to server: democrito/10.2.6.187:24000. Already tried 7 time(s).
2008-10-28 16:18:43,248 INFO org.apache.hadoop.ipc.Client: Retrying
connect to server: democrito/10.2.6.187:24000. Already tried 8 time(s).
2008-10-28 16:18:44,250 INFO org.apache.hadoop.ipc.Client: Retrying
connect to server: democrito/10.2.6.187:24000. Already tried 9 time(s).
2008-10-28 16:18:44,254 ERROR org.apache.hadoop.dfs.DataNode:
java.io.IOException: Call failed on local exception
at org.apache.hadoop.ipc.Client.call(Client.java:718)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)
at org.apache.hadoop.dfs.$Proxy4.getProtocolVersion(Unknown
Source)
at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:319)
at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:306)
at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:343)
at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:288)
at
org.apache.hadoop.dfs.DataNode.startDataNode(DataNode.java:244)
at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:190)
at
org.apache.hadoop.dfs.DataNode.makeInstance(DataNode.java:2987)
at
org.apache.hadoop.dfs.DataNode.instantiateDataNode(DataNode.java:2942)
at
org.apache.hadoop.dfs.DataNode.createDataNode(DataNode.java:2950)
at org.apache.hadoop.dfs.DataNode.main(DataNode.java:3072)
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 sun.nio.ch.SocketAdaptor.connect(SocketAdaptor.java:100)
at
org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:300)
at
org.apache.hadoop.ipc.Client$Connection.access$1700(Client.java:177)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:789)
at org.apache.hadoop.ipc.Client.call(Client.java:704)
... 12 more
Can anyone help please?
Thank you
Alberto
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