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From Shuja Rehman <shujamug...@gmail.com>
Subject Re: Cannot connect to HBase from a remote machine
Date Mon, 07 Feb 2011 09:27:57 GMT
check the version of jars files on client and server machine. both should
have same version. i had the similar problem in past and i found that i was
using the old jars on client where server had the latest jars.



On Mon, Feb 7, 2011 at 10:33 AM, Mark Kerzner <markkerzner@gmail.com> wrote:

> My friendly network administrators have found out that the ports were
> blocked, and they have disabled port blocking, so now the nc works right,
> but the program still hangs:
>
> nc myip 2181
> ruok*
> imok
>
> java -jar dist/HBaseMailboxIdCounter.jar
> 11/02/06 20:24:54 INFO zookeeper.ZooKeeperWrapper: Reconnecting to
> zookeeper
> 11/02/06 20:24:54 INFO zookeeper.ZooKeeper: Client
> environment:zookeeper.version=3.3.1-942149, built on 05/07/2010 17:14 GMT
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client environment:host.name
> =myhost
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
> environment:java.version=1.6.0_22
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
> environment:java.vendor=Sun Microsystems Inc.
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
> environment:java.home=/usr/java/jdk1.6.0_22/jre
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
> environment:java.class.path=dist/HBaseMailboxIdCounter.jar
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
>
> environment:java.library.path=/usr/java/jdk1.6.0_22/jre/lib/amd64/server:/usr/java/jdk1.6.0_22/jre/lib/amd64:/usr/java/jdk1.6.0_22/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
> environment:java.io.tmpdir=/tmp
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
> environment:java.compiler=<NA>
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client environment:os.name
> =Linux
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
> environment:os.arch=amd64
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
> environment:os.version=2.6.18-194.el5
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client environment:user.name
> =markk
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
> environment:user.home=/home/markk
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Client
> environment:user.dir=/home/markk
> 11/02/06 20:24:55 INFO zookeeper.ZooKeeper: Initiating client connection,
> connectString=myip:2181 sessionTimeout=60000
> watcher=org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper@2d04faf8
> 11/02/06 20:24:55 INFO zookeeper.ClientCnxn: Opening socket connection to
> server /myip:2181
> 11/02/06 20:24:55 INFO zookeeper.ClientCnxn: Socket connection established
> to 184-106-69-238.static.cloud-ips.com/myip:2181, initiating session
> 11/02/06 20:24:55 INFO zookeeper.ClientCnxn: Session establishment complete
> on server 184-106-69-238.static.cloud-ips.com/myip:2181, sessionid =
> 0x12dfe59049a0003, negotiated timeout = 40000
>
> (hangs here)
>
> On Sun, Feb 6, 2011 at 9:40 PM, Ted Dunning <tdunning@maprtech.com> wrote:
>
> > Yes.  No route to host is a little odd if ping works, but it looks like
> you
> > have network problems.
> >
> > On Sun, Feb 6, 2011 at 7:34 PM, Mark Kerzner <markkerzner@gmail.com>
> > wrote:
> >
> > > This probably diagnoses the problem:
> > >
> > > If I do nc on the HBase computer, it works, like this -
> > >
> > > nc myip 2181
> > > ruok*
> > > imok
> > >
> > > but if I do it on the remote one, it comes back right away, no error,
> but
> > > no
> > > work either -
> > >
> > > $ nc myip 2181
> > > $
> > >
> > > Also telnet tells the same story:
> > >
> > > telnet myip 2181
> > > Trying myip...
> > > telnet: connect to address myip: No route to host
> > > telnet: Unable to connect to remote host: No route to host
> > >
> > > I can ping it OK though.
> > >
> > > Thank you,
> > > Mark
> > >
> > > On Sun, Feb 6, 2011 at 8:28 PM, Ted Dunning <tdunning@maprtech.com>
> > wrote:
> > >
> > > > What happens when you try to connect to myip:2181 directly?
> > > >
> > > > You can use nc (network cat) for this:
> > > >
> > > >   $ *nc myip 2181*
> > > > *   ruok*
> > > >   imok
> > > >   $
> > > >
> > > > You type the part in bold italics (nc and ruok) and the response from
> > the
> > > > system is (should be) "imok".
> > > >
> > > > There are a number of such "four letter words" that Zookeeper
> supports,
> > > but
> > > > the key here is to verify that Zookeeper is up and running and
> > > accessible.
> > > >
> > > > On Sun, Feb 6, 2011 at 5:25 PM, Mark Kerzner <markkerzner@gmail.com>
> > > > wrote:
> > > >
> > > > > Then I get this error:
> > > > >
> > > > > 11/02/06 17:16:09 INFO zookeeper.ZooKeeper: Initiating client
> > > connection,
> > > > > connectString=myip:2181 sessionTimeout=60000
> > > > > watcher=org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper@21f8c6df
> > > > > 11/02/06 17:16:09 INFO zookeeper.ClientCnxn: Opening socket
> > connection
> > > to
> > > > > server /myip:2181
> > > > > 11/02/06 17:16:09 WARN zookeeper.ClientCnxn: Session 0x0 for server
> > > null,
> > > > > unexpected error, closing socket connection and attempting
> reconnect
> > > > > java.net.NoRouteToHostException: No route to host
> > > > > at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> > > > > at
> > > sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)
> > > > > at
> > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1078)
> > > > >
> > > > > (of course, myip is the real ip with digits, I just replaced it for
> > > this
> > > > > email, and I verified that the ip is correct, and that HBase runs
> at
> > > this
> > > > > ip)
> > > > >
> > > > > Thank you again,
> > > > > Mark
> > > > >
> > > > > On Sun, Feb 6, 2011 at 5:34 PM, Tost <ncanis@gmail.com> wrote:
> > > > >
> > > > > > Try this.
> > > > > > config.set("hbase.zookeeper.quorum", "myip");
> > > > > >
> > > > > > 2011/2/6 Mark Kerzner <markkerzner@gmail.com>
> > > > > >
> > > > > > > Hi, guys,
> > > > > > >
> > > > > > > I have these lines trying to connect to the HBase, and
it works
> > > > > perfectly
> > > > > > > well when I am connecting on that machine that runs HBase,
but
> > not
> > > > when
> > > > > I
> > > > > > > am
> > > > > > > connecting from the outside. What ports or other conditions
> > should
> > > I
> > > > > > check?
> > > > > > >
> > > > > > >        Configuration config = HBaseConfiguration.create();
> > > > > > >        config.set("hbase.zookeeper.quorum", "myip:60010");
> > > > > > >        config.set("hbase.zookeeper.property.clientPort",
> "2181");
> > > > > > >
> > > > > > >        HTable table = new HTable(config, "myTable");
> > > > > > >
> > > > > > > Thank you!
> > > > > > >
> > > > > > > Mark
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>



-- 
Regards
Shuja-ur-Rehman Baig
<http://pk.linkedin.com/in/shujamughal>

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