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Date: 4 Mar 2009 06:06:31 -0000
Message-ID: <20090304060631.20655.qmail@f5mail-237-204.rediffmail.com>
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From: "shefali pawar" <shefali_p@rediffmail.com>
Reply-To: "shefali pawar" <shefali_p@rediffmail.com>
To: core-user@hadoop.apache.org
Subject: Re: Re: Re: Re: Re: Re: Re: Regarding "Hadoop multi cluster" set-up
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=0AWe set-up a dedicated LAN consisting of the 2 computers using a switch. =
I think that made a difference and the 2 node cluster is working fine now. =
Also now we are working on Ubuntu and not Fedora.=0A=0AThanks for all the h=
elp.=0A=0AShefali=0A=0A=0AOn Thu, 12 Feb 2009 shefali pawar wrote :=0A>I ch=
anged the value... It is still not working!=0A>=0A>Shefali=0A>=0A>On Tue, 1=
0 Feb 2009 22:23:10 +0530  wrote=0A> >in hadoop-site.xml=0A> >change master=
:54311=0A> >=0A> >to hdfs://master:54311=0A> >=0A> >=0A> >--nitesh=0A> >=0A=
> >On Tue, Feb 10, 2009 at 9:50 PM, shefali pawar wrote:=0A> >=0A> >> I tri=
ed that, but it is not working either!=0A> >>=0A> >> Shefali=0A> >>=0A> >> =
On Sun, 08 Feb 2009 05:27:54 +0530 =A0wrote=0A> >> >I ran into this trouble=
 again. This time, formatting the namenode didnt=0A> >> >help. So, I change=
d the directories where the metadata and the data was=0A> >> >being stored.=
 That made it work.=0A> >> >=0A> >> >You might want to check this up at you=
r end too.=0A> >> >=0A> >> >Amandeep=0A> >> >=0A> >> >PS: I dont have an ex=
planation for how and why this made it work.=0A> >> >=0A> >> >=0A> >> >Aman=
deep Khurana=0A> >> >Computer Science Graduate Student=0A> >> >University o=
f California, Santa Cruz=0A> >> >=0A> >> >=0A> >> >On Sat, Feb 7, 2009 at 9=
:06 AM, jason hadoop =A0wrote:=0A> >> >=0A> >> >> On your master machine, u=
se the netstat command to determine what ports=0A> >> and=0A> >> >> address=
es the namenode process is listening on.=0A> >> >>=0A> >> >> On the datanod=
e machines, examine the log files,, to verify that the=0A> >> >> datanode h=
as attempted to connect to the namenode ip address on one of=0A> >> >> thos=
e=0A> >> >> ports, and was successfull.=0A> >> >>=0A> >> >> The common port=
s used for datanode -> namenode rondevu are 50010, 54320=0A> >> and=0A> >> =
>> 8020, depending on your hadoop version=0A> >> >>=0A> >> >> If the datano=
des have been started, and the connection to the namenode=0A> >> >> failed,=
 there will be a log message with a socket error, indicating what=0A> >> >>=
 host and port the datanode used to attempt to communicate with the=0A> >> =
>> namenode.=0A> >> >> Verify that that ip address is correct for your name=
node, and reachable=0A> >> >> from=0A> >> >> the datanode host (for multi h=
omed machines this can be an issue), and=0A> >> that=0A> >> >> the port lis=
ted is one of the tcp ports that the namenode process is=0A> >> >> listing=
=0A> >> >> on.=0A> >> >>=0A> >> >> For linux, you can use command=0A> >> >>=
 *netstat -a -t -n -p | grep java | grep LISTEN*=0A> >> >> to determine the=
 ip addresses and ports and pids of the java processes=0A> >> that=0A> >> >=
> are listening for tcp socket connections=0A> >> >>=0A> >> >> and the jps =
command from the bin directory of your java installation to=0A> >> >> deter=
mine the pid of the namenode.=0A> >> >>=0A> >> >> On Sat, Feb 7, 2009 at 6:=
27 AM, shefali pawar > >wrote:=0A> >> >>=0A> >> >> > Hi,=0A> >> >> >=0A> >>=
 >> > No, not yet. We are still struggling! If you find the solution please=
=0A> >> let=0A> >> >> > me know.=0A> >> >> >=0A> >> >> > Shefali=0A> >> >> =
>=0A> >> >> > On Sat, 07 Feb 2009 02:56:15 +0530 =A0wrote=0A> >> >> > >I ha=
d to change the master on my running cluster and ended up with=0A> >> the=
=0A> >> >> > same=0A> >> >> > >problem. Were you able to fix it at your end=
?=0A> >> >> > >=0A> >> >> > >Amandeep=0A> >> >> > >=0A> >> >> > >=0A> >> >>=
 > >Amandeep Khurana=0A> >> >> > >Computer Science Graduate Student=0A> >> =
>> > >University of California, Santa Cruz=0A> >> >> > >=0A> >> >> > >=0A> =
>> >> > >On Thu, Feb 5, 2009 at 8:46 AM, shefali pawar wrote:=0A> >> >> > >=
=0A> >> >> > >> Hi,=0A> >> >> > >>=0A> >> >> > >> I do not think that the f=
irewall is blocking the port because it=0A> >> has=0A> >> >> > been=0A> >> =
>> > >> turned off on both the computers! And also since it is a random=0A>=
 >> port=0A> >> >> > number=0A> >> >> > >> I do not think it should create =
a problem.=0A> >> >> > >>=0A> >> >> > >> I do not understand what is going =
wrong!=0A> >> >> > >>=0A> >> >> > >> Shefali=0A> >> >> > >>=0A> >> >> > >> =
On Wed, 04 Feb 2009 23:23:04 +0530 =A0wrote=0A> >> >> > >> >I'm not certain=
 that the firewall is your problem but if that port=0A> >> is=0A> >> >> > >=
> >blocked on your master you should open it to let communication=0A> >> >>=
 through.=0A> >> >> > >> Here=0A> >> >> > >> >is one website that might be =
relevant:=0A> >> >> > >> >=0A> >> >> > >> >=0A> >> >> > >>=0A> >> >> >=0A> =
>> >>=0A> >> http://stackoverflow.com/questions/255077/open-ports-under-fed=
ora-core-8-for-vmware-server=0A> >> >> > >> >=0A> >> >> > >> >but again, th=
is may not be your problem.=0A> >> >> > >> >=0A> >> >> > >> >John=0A> >> >>=
 > >> >=0A> >> >> > >> >On Wed, Feb 4, 2009 at 12:46 PM, shefali pawar wrot=
e:=0A> >> >> > >> >=0A> >> >> > >> >> Hi,=0A> >> >> > >> >>=0A> >> >> > >> =
>> I will have to check. I can do that tomorrow in college. But if=0A> >> >=
> that=0A> >> >> > is=0A> >> >> > >> the=0A> >> >> > >> >> case what should=
 i do?=0A> >> >> > >> >>=0A> >> >> > >> >> Should i change the port number =
and try again?=0A> >> >> > >> >>=0A> >> >> > >> >> Shefali=0A> >> >> > >> >=
>=0A> >> >> > >> >> On Wed, 04 Feb 2009 S D wrote :=0A> >> >> > >> >>=0A> >=
> >> > >> >> >Shefali,=0A> >> >> > >> >> >=0A> >> >> > >> >> >Is your firew=
all blocking port 54310 on the master?=0A> >> >> > >> >> >=0A> >> >> > >> >=
> >John=0A> >> >> > >> >> >=0A> >> >> > >> >> >On Wed, Feb 4, 2009 at 12:34=
 PM, shefali pawar > >wrote:=0A> >> >> > >> >> >=0A> >> >> > >> >> > > Hi,=
=0A> >> >> > >> >> > >=0A> >> >> > >> >> > > I am trying to set-up a two no=
de cluster using Hadoop0.19.0,=0A> >> >> with=0A> >> >> > 1=0A> >> >> > >> =
>> > > master(which should also work as a slave) and 1 slave node.=0A> >> >=
> > >> >> > >=0A> >> >> > >> >> > > But while running bin/start-dfs.sh the =
datanode is not=0A> >> starting=0A> >> >> > on=0A> >> >> > >> the=0A> >> >>=
 > >> >> > > slave. I had read the previous mails on the list, but=0A> >> n=
othing=0A> >> >> > seems=0A> >> >> > >> to=0A> >> >> > >> >> be=0A> >> >> >=
 >> >> > > working in this case. I am getting the following error in=0A> >>=
 the=0A> >> >> > >> >> > > hadoop-root-datanode-slave log file while runnin=
g the=0A> >> command=0A> >> >> > >> >> > > bin/start-dfs.sh =3D>=0A> >> >> =
> >> >> > >=0A> >> >> > >> >> > > 2009-02-03 13:00:27,516 INFO=0A> >> >> > =
>> >> > > org.apache.hadoop.hdfs.server.datanode.DataNode:=0A> >> STARTUP_M=
SG:=0A> >> >> > >> >> > >=0A> >> /*****************************************=
*******************=0A> >> >> > >> >> > > STARTUP_MSG: Starting DataNode=0A=
> >> >> > >> >> > > STARTUP_MSG: =A0host =3D slave/172.16.0.32=0A> >> >> > =
>> >> > > STARTUP_MSG: =A0args =3D []=0A> >> >> > >> >> > > STARTUP_MSG: =
=A0version =3D 0.19.0=0A> >> >> > >> >> > > STARTUP_MSG: =A0build =3D=0A> >=
> >> > >> >> > >=0A> >> >> > https://svn.apache.org/repos/asf/hadoop/core/b=
ranches/branch-0.19-r=0A> >> >> > >> >> > > 713890; compiled by 'ndaley' on=
 Fri Nov 14 03:12:29 UTC 2008=0A> >> >> > >> >> > >=0A> >> ****************=
********************************************/=0A> >> >> > >> >> > > 2009-02=
-03 13:00:28,725 INFO org.apache.hadoop.ipc.Client:=0A> >> >> > Retrying=0A=
> >> >> > >> >> connect=0A> >> >> > >> >> > > to server: master/172.16.0.46=
:54310. Already tried 0=0A> >> time(s).=0A> >> >> > >> >> > > 2009-02-03 13=
:00:29,726 INFO org.apache.hadoop.ipc.Client:=0A> >> >> > Retrying=0A> >> >=
> > >> >> connect=0A> >> >> > >> >> > > to server: master/172.16.0.46:54310=
. Already tried 1=0A> >> time(s).=0A> >> >> > >> >> > > 2009-02-03 13:00:30=
,727 INFO org.apache.hadoop.ipc.Client:=0A> >> >> > Retrying=0A> >> >> > >>=
 >> connect=0A> >> >> > >> >> > > to server: master/172.16.0.46:54310. Alre=
ady tried 2=0A> >> time(s).=0A> >> >> > >> >> > > 2009-02-03 13:00:31,728 I=
NFO org.apache.hadoop.ipc.Client:=0A> >> >> > Retrying=0A> >> >> > >> >> co=
nnect=0A> >> >> > >> >> > > to server: master/172.16.0.46:54310. Already tr=
ied 3=0A> >> time(s).=0A> >> >> > >> >> > > 2009-02-03 13:00:32,729 INFO or=
g.apache.hadoop.ipc.Client:=0A> >> >> > Retrying=0A> >> >> > >> >> connect=
=0A> >> >> > >> >> > > to server: master/172.16.0.46:54310. Already tried 4=
=0A> >> time(s).=0A> >> >> > >> >> > > 2009-02-03 13:00:33,730 INFO org.apa=
che.hadoop.ipc.Client:=0A> >> >> > Retrying=0A> >> >> > >> >> connect=0A> >=
> >> > >> >> > > to server: master/172.16.0.46:54310. Already tried 5=0A> >=
> time(s).=0A> >> >> > >> >> > > 2009-02-03 13:00:34,731 INFO org.apache.ha=
doop.ipc.Client:=0A> >> >> > Retrying=0A> >> >> > >> >> connect=0A> >> >> >=
 >> >> > > to server: master/172.16.0.46:54310. Already tried 6=0A> >> time=
(s).=0A> >> >> > >> >> > > 2009-02-03 13:00:35,732 INFO org.apache.hadoop.i=
pc.Client:=0A> >> >> > Retrying=0A> >> >> > >> >> connect=0A> >> >> > >> >>=
 > > to server: master/172.16.0.46:54310. Already tried 7=0A> >> time(s).=
=0A> >> >> > >> >> > > 2009-02-03 13:00:36,733 INFO org.apache.hadoop.ipc.C=
lient:=0A> >> >> > Retrying=0A> >> >> > >> >> connect=0A> >> >> > >> >> > >=
 to server: master/172.16.0.46:54310. Already tried 8=0A> >> time(s).=0A> >=
> >> > >> >> > > 2009-02-03 13:00:37,734 INFO org.apache.hadoop.ipc.Client:=
=0A> >> >> > Retrying=0A> >> >> > >> >> connect=0A> >> >> > >> >> > > to se=
rver: master/172.16.0.46:54310. Already tried 9=0A> >> time(s).=0A> >> >> >=
 >> >> > > 2009-02-03 13:00:37,738 ERROR=0A> >> >> > >> >> > > org.apache.h=
adoop.hdfs.server.datanode.DataNode:=0A> >> >> > >> java.io.IOException:=0A=
> >> >> > >> >> Call=0A> >> >> > >> >> > > to master/172.16.0.46:54310 fail=
ed on local exception: No=0A> >> >> route=0A> >> >> > to=0A> >> >> > >> >> =
host=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at org.apache.hadoop.ipc.Client.c=
all(Client.java:699)=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at=0A> >> >> org.=
apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)=0A> >> >> > >> >> > > =
=A0 =A0 =A0 =A0at $Proxy4.getProtocolVersion(Unknown Source)=0A> >> >> > >>=
 >> > > =A0 =A0 =A0 =A0at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:319)=
=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at org.apache.hadoop.ipc.RPC.getProxy=
(RPC.java:306)=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at org.apache.hadoop.ip=
c.RPC.getProxy(RPC.java:343)=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at=0A> >>=
 org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:288)=0A> >> >> > >> >> > >=
 =A0 =A0 =A0 =A0at=0A> >> >> > >> >> > >=0A> >> >> > >> >>=0A> >> >> > >>=
=0A> >> >> >=0A> >> >>=0A> >> org.apache.hadoop.hdfs.server.datanode.DataNo=
de.startDataNode(DataNode.java:258)=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at=
=0A> >> >> > >> >> > >=0A> >> >> > >> >>=0A> >> org.apache.hadoop.hdfs.serv=
er.datanode.DataNode.(DataNode.java:205)=0A> >> >> > >> >> > > =A0 =A0 =A0 =
=A0at=0A> >> >> > >> >> > >=0A> >> >> > >> >>=0A> >> >> > >>=0A> >> >> >=0A=
> >> >>=0A> >> org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance=
(DataNode.java:1199)=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at=0A> >> >> > >>=
 >> > >=0A> >> >> > >> >>=0A> >> >> > >>=0A> >> >> >=0A> >> >>=0A> >> org.a=
pache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.jav=
a:1154)=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at=0A> >> >> > >> >> > >=0A> >=
> >> > >> >>=0A> >> >> > >>=0A> >> >> >=0A> >> >>=0A> >> org.apache.hadoop.=
hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1162)=0A> >> >> =
> >> >> > > =A0 =A0 =A0 =A0at=0A> >> >> > >> >> > >=0A> >> >> > >> >>=0A> >=
> >> >=0A> >> org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode=
.java:1284)=0A> >> >> > >> >> > > Caused by: java.net.NoRouteToHostExceptio=
n: No route to host=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at sun.nio.ch.Sock=
etChannelImpl.checkConnect(Native=0A> >> >> > Method)=0A> >> >> > >> >> > >=
 =A0 =A0 =A0 =A0at=0A> >> >> > >> >> > >=0A> >> >> > >>=0A> >> sun.nio.ch.S=
ocketChannelImpl.finishConnect(SocketChannelImpl.java:574)=0A> >> >> > >> >=
> > > =A0 =A0 =A0 =A0at=0A> >> >> > sun.nio.ch.SocketAdaptor.connect(Socket=
Adaptor.java:100)=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at=0A> >> >> > >> >>=
 > >=0A> >> >> > >>=0A> >> >> org.apache.hadoop.ipc.Client$Connection.setup=
IOstreams(Client.java:299)=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at=0A> >> >=
> > >> >> > >=0A> >> >> > org.apache.hadoop.ipc.Client$Connection.access$17=
00(Client.java:176)=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0at=0A> >> >> > >> =
org.apache.hadoop.ipc.Client.getConnection(Client.java:772)=0A> >> >> > >> =
>> > > =A0 =A0 =A0 =A0at org.apache.hadoop.ipc.Client.call(Client.java:685)=
=0A> >> >> > >> >> > > =A0 =A0 =A0 =A0... 12 more=0A> >> >> > >> >> > >=0A>=
 >> >> > >> >> > > 2009-02-03 13:00:37,739 INFO=0A> >> >> > >> >> > > org.a=
pache.hadoop.hdfs.server.datanode.DataNode:=0A> >> SHUTDOWN_MSG:=0A> >> >> =
> >> >> > >=0A> >> /*******************************************************=
*****=0A> >> >> > >> >> > > SHUTDOWN_MSG: Shutting down DataNode at slave/1=
72.16.0.32=0A> >> >> > >> >> > >=0A> >> ***********************************=
*************************/=0A> >> >> > >> >> > >=0A> >> >> > >> >> > >=0A> =
>> >> > >> >> > > Also, the Pseudo distributed operation is working on both=
=0A> >> the=0A> >> >> > >> machines.=0A> >> >> > >> >> And=0A> >> >> > >> >=
> > > i am able to ssh from 'master to master' and 'master to=0A> >> slave'=
=0A> >> >> > via a=0A> >> >> > >> >> > > password-less ssh login. I do not =
think there is any problem=0A> >> >> with=0A> >> >> > >> the=0A> >> >> > >>=
 >> > > network because cross pinging is working fine.=0A> >> >> > >> >> > =
>=0A> >> >> > >> >> > > I am working on Linux (Fedora 8)=0A> >> >> > >> >> =
> >=0A> >> >> > >> >> > > The following is the configuration which i am usi=
ng=0A> >> >> > >> >> > >=0A> >> >> > >> >> > > On master and slave, /conf/m=
asters looks like this:=0A> >> >> > >> >> > >=0A> >> >> > >> >> > > =A0mast=
er=0A> >> >> > >> >> > >=0A> >> >> > >> >> > > On master and slave, /conf/s=
laves looks like this:=0A> >> >> > >> >> > >=0A> >> >> > >> >> > > =A0maste=
r=0A> >> >> > >> >> > > =A0slave=0A> >> >> > >> >> > >=0A> >> >> > >> >> > =
> On both the machines conf/hadoop-site.xml looks like this=0A> >> >> > >> =
>> > >=0A> >> >> > >> >> > >=0A> >> >> > >> >> > > =A0fs.default.name=0A> >=
> >> > >> >> > > =A0hdfs://master:54310=0A> >> >> > >> >> > > =A0The name o=
f the default file system. =A0A URI whose=0A> >> >> > >> >> > > =A0scheme a=
nd authority determine the FileSystem=0A> >> implementation.=0A> >> >> > =
=A0The=0A> >> >> > >> >> > > =A0uri's scheme determines the config property=
=0A> >> (fs.SCHEME.impl)=0A> >> >> > naming=0A> >> >> > >> >> > > =A0the Fi=
leSystem implementation class. =A0The uri's authority=0A> >> is=0A> >> >> >=
 used=0A> >> >> > >> to=0A> >> >> > >> >> > > =A0determine the host, port, =
etc. for a filesystem.=0A> >> >> > >> >> > >=0A> >> >> > >> >> > >=0A> >> >=
> > >> >> > > =A0mapred.job.tracker=0A> >> >> > >> >> > > =A0master:54311=
=0A> >> >> > >> >> > > =A0The host and port that the MapReduce job tracker =
runs=0A> >> >> > >> >> > > =A0at. =A0If "local", then jobs are run in-proce=
ss as a single=0A> >> map=0A> >> >> > >> >> > > =A0and reduce task.=0A> >> =
>> > >> >> > >=0A> >> >> > >> >> > >=0A> >> >> > >> >> > >=0A> >> >> > >> >=
> > > =A0dfs.replication=0A> >> >> > >> >> > > =A02=0A> >> >> > >> >> > > =
=A0Default block replication.=0A> >> >> > >> >> > > =A0The actual number of=
 replications can be specified when the=0A> >> >> file=0A> >> >> > is=0A> >=
> >> > >> >> > > created.=0A> >> >> > >> >> > > =A0The default is used if r=
eplication is not specified in=0A> >> create=0A> >> >> > time.=0A> >> >> > =
>> >> > >=0A> >> >> > >> >> > >=0A> >> >> > >> >> > >=0A> >> >> > >> >> > >=
 namenode is formatted succesfully by running=0A> >> >> > >> >> > >=0A> >> =
>> > >> >> > > "bin/hadoop namenode -format"=0A> >> >> > >> >> > >=0A> >> >=
> > >> >> > > on the master node.=0A> >> >> > >> >> > >=0A> >> >> > >> >> >=
 > I am new to Hadoop and I do not know what is going wrong.=0A> >> >> > >>=
 >> > >=0A> >> >> > >> >> > > Any help will be appreciated.=0A> >> >> > >> =
>> > >=0A> >> >> > >> >> > > Thanking you in advance=0A> >> >> > >> >> > >=
=0A> >> >> > >> >> > > Shefali Pawar=0A> >> >> > >> >> > > Pune, India=0A> =
>> >> > >> >> > >=0A> >> >> > >> >>=0A> >> >> > >> >>=0A> >> >> > >> >>=0A>=
 >> >> > >> >=0A> >> >> > >>=0A> >> >> > >=0A> >> >> >=0A> >> >>=0A> >> >=
=0A> >>=0A> >=0A> >=0A> >=0A> >--=0A> >Nitesh Bhatia=0A> >Dhirubhai Ambani =
Institute of Information & Communication Technology=0A> >Gandhinagar=0A> >G=
ujarat=0A> >=0A> >"Life is never perfect. It just depends where you draw th=
e line."=0A> >=0A> >visit:=0A> >http://www.awaaaz.com - connecting through =
music=0A> >http://www.volstreet.com - lets volunteer for better tomorrow=0A=
> >http://www.instibuzz.com - Voice opinions, Transact easily, Have fun=0A>=
 >=0A
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