[Paraview] Fwd: Not being able to connect to pvserver

Pradeep Jha pradeep at ccs.engg.nagoya-u.ac.jp
Wed Jan 30 20:27:35 EST 2013 

Thanks a lot for your detailed response Burlen.


2013/1/31 Burlen Loring <bloring at lbl.gov>

>
>  Presently, I have PV 3.98 installed from source with MPI support on my
> local Mac and a remote Linux machine. I ran the pvsc file that you sent
> from my local Mac but I was not sure what goes in the input for "MPI Root"
> and "ParaView Root". I left those two fields blank and tried to connect and
> gave me the following error:
>
> Sorry if that wasn't clear. for example if you have mpi installed in
> "/op/mpi/mpich/1.4.1" then you put that for "MPI Root". Likewise if you
> have your PV build at "/home/pradeep/ParaView/3.98.0" you put that.
>
>
> On 01/30/2013 01:40 AM, Pradeep Jha wrote:
>
> Hello Burlen,
>
>  thanks for the detailed response. I am still not able to get it work and
> somethings are still not clear to me. I want to ask some very fundamental
> questions as this is my first time trying to set up a something over the
> networks myself and the online instructions are a bit too technical for me.
>
>  Presently, I have PV 3.98 installed from source with MPI support on my
> local Mac and a remote Linux machine. I ran the pvsc file that you sent
> from my local Mac but I was not sure what goes in the input for "MPI Root"
> and "ParaView Root". I left those two fields blank and tried to connect and
> gave me the following error:
>
>  ------------------------------------------------------------------------
>  pradeep at laptop subset]$MPI_NP=4
> MPI_ROOT=
> PV_ROOT=
> PV_SERVER_PORT=11111
> REMOTE_USER=pradeep
> SERVER_HOST=83.shin.fluid.cse.nagoya-u.ac.jp
> SSH_PATH=/usr/bin/ssh
> XTERM_PATH=/usr/bin/xterm
> Accepting connection(s): laptop.local:11111
> Server launch command is : /usr/bin/xterm -T "ParaView Server
> pradeep at 83.shin.fluid.cse.nagoya-u.ac.jp:11111" -e /usr/bin/ssh -t -R
> 11111:localhost:11111 pradeep at 83.shin.fluid.cse.nagoya-u.ac.jp DISPLAY=:0
> xhost + ; LD_LIBRARY_PATH=/lib:/lib/paraview-3.98/:LD_LIBRARY_PATH
> DISPLAY=:0 /bin/mpirun -np 4 /bin/pvserver --reverse-connection
> --server-port=11111 --client-host=localhost
> The process failed to start. Either the invoked program is missing, or you
> may have insufficient permissions to invoke the program.
> Server launch timed out.
> ---------------------------------------------------------------------------
>
>  Here are my questions:
>
>    1. How do I get the above thing working?
>    2. What did you mean by "Production setting"?
>     3. I am right now testing PV on small test cases over machines (my
>    Mac and the remote Linux) which have both graphics hardware. For such a
>    case why do I need "reverse connection"? Should I always use "reverse
>    connection"?
>     4. I don't understand when I initiate a pvserver on the remote Linux
>    machine and try to connect it from local Mac, why doesn't it ask for a
>    password?
>     5. My understanding is that when I get this connection going, all my
>    data should be on the server. I simply use the local Mac GUI and I should
>    be able to visualize and browse through data at the remote end. Is that
>    correct?
>     6. When I am at lab, I have a static IP for my Mac and I can log into
>    it from other computers. But I cannot access my Mac from outside when I am
>    not in the lab. Does this mean I cannot use pvserver outside the lab? Or is this
>    link<https://hpcforge.org/plugins/mediawiki/wiki/pv-meshless/index.php/Launching_ParaView_on_HPC_Machines#Step_2>is talking about this problem?
>    7. Once I manage to understand and get it working, I want to use PV
>    using a supercomputing facility. On the supercomputing facility I can
>    install PV on my login node (which has 64 processors) but not on the
>    supercomputing cluster. If I want to use the cluster (which has around
>    50,000 processors) to visualize a big
>    data (around 800GB if possible), will installing Paraview with MPI
>    support on the login node, which is accesible by the cluster, be
>    sufficient?
>
>
> I guess these questions are extremely basic but I am responsible for
> figuring this whole thing out myself and with not much direct experience in
> networking. So it is troubling me a bit.
>
>  Hoping to hear from you,
> Pradeep
>
>
> 2013/1/30 Burlen Loring <bloring at lbl.gov>
>
>> Hi Pradeep,
>>
>>
>>  vtkClientSocket (0x7fc9ae108cb0): Socket error in call to connect.
>>> Permission denied.
>>>
>>
>>  Your connection is being blocked somewhere in between your compute node
>> and workstation. there are various configuration setting on either/both
>> client and server that could cause it. Fortunately we do not need to change
>> any of these settings , many of which require root access and potentially
>> open security vulnerabilities. Instead, you will use an ssh tunnel and a
>> server config (pvsc) tailored to your situation to automate the process.
>>
>> I'm attaching a minimal pvsc that illustrates how one might configure a
>> reverse connection to a server with graphics hardware.  This pvsc is for
>> illustration only, don't use in a production setting! There are number of
>> liberties I've taken, for example I assume that X11 is already running, and
>> I use "xhost +"(very very bad) to enable pvserver to access gpu's. Normally
>> I would put all of the server side stuff in a shell script. I didn't do
>> that here to keep things simple for you. I hope you can use this to
>> understand how PV works.
>>
>>
>>  1) I connect to the CentOS machine using "ssh -X machinename".
>>>
>>  Don't do that. With -X forwarding you won't be taking advantage of your
>> cluster's graphics hardware.
>>
>> Hope this helps
>> Burlen
>>
>>
>> On 01/29/2013 06:41 AM, Utkarsh Ayachit wrote:
>>
>>> Doesn't look like your client machine can connect to the server
>>> machine. From the client machine try:
>>>
>>>  ping 83.shin.fluid.cse.nagoya-u.ac.jp
>>>> telnet 83.shin.fluid.cse.nagoya-u.ac.jp 11111
>>>>
>>>
>>>
>>> On Tue, Jan 29, 2013 at 4:58 AM, Pradeep Jha
>>> <pradeep at ccs.engg.nagoya-u.ac.jp> wrote:
>>>
>>>> Hello,
>>>>
>>>> I have installed Paraview 3.98 on my Desktop (Mac OSX 10.8) and a remote
>>>> machine running CentOS 5.4. The CentOS machine has rendering hardware
>>>> so I
>>>> havent installed PV with OSMesa support.
>>>>
>>>> I can login to the CentOS from my Mac using SSH and vice versa.
>>>>
>>>> Here is how I am trying to connect:
>>>>
>>>> 1) I connect to the CentOS machine using "ssh -X machinename". When I
>>>> start
>>>> the "pvserver" on the CentOS the output is:
>>>> -------------------------------------------------------------------
>>>> [pradeep at 83 ~]$pvserver
>>>> Waiting for client...
>>>> Connection URL: cs://83.shin.fluid.cse.nagoya-u.ac.jp:11111
>>>> Accepting connection(s): 83.shin.fluid.cse.nagoya-u.ac.jp:11111
>>>> -------------------------------------------------------------------
>>>>
>>>> 2) Then I add this information in the paraview I am running on my Mac as
>>>> shown in the attached image file.
>>>>
>>>> 3) I click on connect.
>>>>
>>>> I get the following error:
>>>> ------------------------------------------------------------------------
>>>> ERROR: In
>>>> /Users/pradeep/softwares/ParaView/VTK/Common/System/vtkSocket.cxx,
>>>> line 481
>>>> vtkClientSocket (0x7fc9ae108cb0): Socket error in call to connect.
>>>> Permission denied.
>>>> -----------------------------------------------------------------------
>>>>
>>>> I dont have any expertise in networking and so I dont know much about
>>>> firewalls of my systems here nor do any my colleagues do.
>>>>
>>>> Thanks in advance,
>>>> Pradeep
>>>>
>>>>
>>>>
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>>
>>
>
>
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>
> Visit other Kitware open-source projects at
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>
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