> 2008-09-05 10:11:20,106 ERROR org.apache.hadoop.dfs.DataNode: > java.net.BindException: Problem binding to /0.0.0.0:50010
Should you check if something is listening on 50010? I strongly encourage users to go through these logs when something does not work. Regd running multiple datanodes : Along with config directory, you should change the following env variables : HADOOP_LOG_DIR and HADOOP_PID_DIR (I set both to the same value). The following variables should be different in hadoop-site.xml : 1. dfs.data.dir or hadoop.tmp.dir 2. dfs.datanode.address 3. dfs.datanode.http.address 4. dfs.datanode.ipc.address Raghu. 叶双明 wrote: > In addition, I can't start datanode in another computer use command: > bin/hadoop-daemons.sh --config conf start datanode, by the default config, > log message is: > > 2008-09-05 10:11:19,208 INFO org.apache.hadoop.dfs.DataNode: STARTUP_MSG: > /************************************************************ > STARTUP_MSG: Starting DataNode > STARTUP_MSG: host = testcenter/192.168.100.120 > STARTUP_MSG: args = [] > STARTUP_MSG: version = 0.17.1 > STARTUP_MSG: build = > http://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.17 -r 669344; > compiled by 'hadoopqa' on Thu Jun 19 01:18:25 UTC 2008 > ************************************************************/ > 2008-09-05 10:11:20,097 INFO org.apache.hadoop.dfs.DataNode: Registered > FSDatasetStatusMBean > 2008-09-05 10:11:20,106 ERROR org.apache.hadoop.dfs.DataNode: > java.net.BindException: Problem binding to /0.0.0.0:50010 > at org.apache.hadoop.ipc.Server.bind(Server.java:175) > at org.apache.hadoop.dfs.DataNode.startDataNode(DataNode.java:264) > at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:171) > at org.apache.hadoop.dfs.DataNode.makeInstance(DataNode.java:2765) > at > org.apache.hadoop.dfs.DataNode.instantiateDataNode(DataNode.java:2720) > at org.apache.hadoop.dfs.DataNode.createDataNode(DataNode.java:2728) > at org.apache.hadoop.dfs.DataNode.main(DataNode.java:2850) > > 2008-09-05 10:11:20,107 INFO org.apache.hadoop.dfs.DataNode: SHUTDOWN_MSG: > /************************************************************ > SHUTDOWN_MSG: Shutting down DataNode at testcenter/192.168.100.120 > ************************************************************/ > > Maybe there is some wrong network config??? > > 2008/9/5 叶双明 <[EMAIL PROTECTED]> > >> I can start first datanode by >> bin/hadoop-daemons.sh --config conf1 start datanode >> >> and copy conf1 to conf2, and modify the value for follwing properties, port >> = port +1 >> >> <property> >> <name>dfs.datanode.address</name> >> <value>0.0.0.0:50011</value> >> <description> >> The address where the datanode server will listen to. >> If the port is 0 then the server will start on a free port. >> </description> >> </property> >> >> <property> >> <name>dfs.datanode.http.address</name> >> <value>0.0.0.0:50076</value> >> <description> >> The datanode http server address and port. >> If the port is 0 then the server will start on a free port. >> </description> >> </property> >> >> <property> >> <name>dfs.http.address</name> >> <value>0.0.0.0:50071</value> >> <description> >> The address and the base port where the dfs namenode web ui will listen >> on. >> If the port is 0 then the server will start on a free port. >> </description> >> </property> >> >> <property> >> <name>dfs.datanode.https.address</name> >> <value>0.0.0.0:50476</value> >> </property> >> >> And run bin/hadoop-daemons.sh --config conf2 start datanode >> but get message: datanode running as process 4137. Stop it first. >> >> what other properties could I modify between the two config file. >> >> Thanks. >> >> 2008/9/5 lohit <[EMAIL PROTECTED]> >> >> Good way is to have different 'conf' dirs >>> So, you would end up with dir conf1 and conf2 >>> and startup of datanode would be >>> ./bin/hadoop-daemons.sh --config conf1 start datanode >>> ./bin/hadoop-daemons.sh --config conf2 start datanode >>> >>> >>> make sure you have different hadoop-site.xml in conf1 and conf2 dirs. >>> >>> -Lohit >>> >>> ----- Original Message ---- >>> From: 叶双明 <[EMAIL PROTECTED]> >>> To: core-user@hadoop.apache.org >>> Sent: Thursday, September 4, 2008 12:01:48 AM >>> Subject: Re: can i run multiple datanode in one pc? >>> >>> Thanks lohit. >>> >>> I run start datanod by comman: bin/hadoop datanode -conf >>> conf/hadoop-site.xml, it can't work, but command: bin/hadoop datanode can >>> work. >>> >>> Something wrong have I done? >>> >>> >>> >>> bin/hadoop datanode -conf conf/hadoop-site.xml >>> >>> >>> 2008/9/4 lohit <[EMAIL PROTECTED]> >>> >>>> Yes, each datanode should point to different config. >>>> So, if you have conf/hadoop-site.xml make another conf2/hadoop-site.xml >>>> with ports for datanode specific stuff and you should be able to start >>>> multiple datanodes on same node. >>>> -Lohit >>>> >>>> >>>> >>>> ----- Original Message ---- >>>> From: 叶双明 <[EMAIL PROTECTED]> >>>> To: core-user@hadoop.apache.org >>>> Sent: Wednesday, September 3, 2008 8:19:59 PM >>>> Subject: can i run multiple datanode in one pc? >>>> >>>> i know it is running one datanode in one computer normally。 >>>> i wondering can i run multiple datanode in one pc? >>>> >>>> >>>
