Hi Andy,
I just tried my example on arch linux and it works as expected.
(ParaView 5.4.0-RC1)
Somehow I got the feeling it is an issue related to Windows. Just to be
sure, which OS did you choose to test the example code?
Thank you very much for your time and support,
Simon
Am 2017-07-11 17:02, schrieb Andy Bauer:
Hi Simon,
I tried with PV master (84f6e514) and couldn't replicate the crash. I
was able to get the connection between the GUI and the CatalystTest
executable though since I saw the PVTrivialProducer come up in the
GUI.
Maybe you could try PV master and see if it works for you. Beyond that
I think figuring out your issue would take a non-trivial amount of
effort to figure out.
Cheers,
Andy
On Tue, Jul 11, 2017 at 8:04 AM, Simon Klarmann
<[email protected]> wrote:
Hi Andy,
I want to be able to close the connection from both sides. Closing
the connection from the Insitu side works by calling
vtkLiveInsituLink::DropLiveInsituConnection().
Closing the connection from the Live side, e.g. by closing the GUI,
causes my application to hang in the vtkSocket::Receive() method.
After enabling the Debug mode I get the following Error on the
Insitu side:
“ERROR: In
D:\build\ParaView-v5.4.0\VTK\Common\System\vtkSocket.cxx, line 572
vtkClientSocket (0000000008BFFC00): Socket error in call to send.
Eine bestehende Verbindung wurde softwaregesteuert durch den
Hostcomputer abgebrochen.”
„Eine bestehende Verbindung wurde softwaregesteuert durch den
Hostcomputer abgebrochen“
This seems to be a windows specific message notifying about a
software controlled termination of the connection. So the
information of the termination of the connection is somewhere
available. The method throwing this error is the vtkSocket::Send()
method.
This error shows up as soon as I close the connection from the Live
side (GUI) and then perform an InsituUpdate on the Insitu side.
Still after this message, my Insitu side runs into
vtkSocket::Receive() and get stuck there, trying to receive data.
Additional Info:
Performing the live visualization with the vtkCPPythonAdapter leads
to the same error message and a crash of the Insitu application.
Attached is a minimalistic working example. In both cases the error
happens.
Steps to reproduce:
1. Start Paraview ->Catalyst->Connect
2. Start the application, choose either 0 for python or 1 for
cpp, then the PVTrivialproducer should show up in Paraview
3. Close Paraview
4. Continue the application ->crash
I hope this helps a little bit to get an insight on what I did.
Thanks,
Simon
VON: Andy Bauer [mailto:[email protected] [1]]
GESENDET: Montag, 10. Juli 2017 22:21
AN: Simon Klarmann
CC: [email protected]
BETREFF: Re: [Paraview] C++ Catalyst vtkSocket::Receive stuck in
loop on Windows
Hi,
Are you trying to close the connection from the in situ side? The
design was for the connection to be close through the GUI.
It's difficult to say what exactly is going on here without getting
fairly deep into the problem. Theoretically though it should be
possible to do the Live link in C++ as most of the Python routines
call wrapped C++ routines.
There should be some way to figure out the status of the connection
on the PV server (the builtin server if you're not connected to a
separate pvserver process) either the NotifyClientDisconnected()
method, or vtkLiveInsituLink::OnConnectionClosedEvent() or
vtkLiveInsituLink::DropLiveInsituConnection() member functions.
Cheers,
Andy
On Mon, Jul 10, 2017 at 10:34 AM, Simon Klarmann
<[email protected]> wrote:
Sorry I think I have chosen the wrong reply method.
Hi Andy,
I already got rid of Python on both sides. CoProcessing with Live
connection is working by directly using the vtkLiveInsituLink (pure
C++ implementation).
Working with both Paraview 5.2 and 5.4.
My problem is closing the connection on the Live side (e.g. closing
Paraview). Doing so, my Insitu side hangs (when trying again to send
data, m_link->InsituUpdate, see below) in the receive method of the
vtkSocket class until at some point an integer underflow happens.
Closing the connection from the Insitu side everything works as
expected.
Are there any methods to directly check if the connection is still
alive?
Or is it a Windows specific problem?
Additionally the steps for the live connection in C++, for sure
there may be more elegant ways:
// Initialization
vtkCPProcessor *m_proc = vtkCPProcessor::New();
m_proc->Initialize();
vtkLiveInsituLink *m_link =
vtkLiveInsituLink::New();
m_link->SetInsituPort(22222);
m_link->SetHostname("localhost");
m_link->SetProcessType(vtkLiveInsituLink::INSITU);
vtkSMProxyManager *m_spxm =
vtkSMProxyManager::GetProxyManager()->GetActiveSessionProxyManager();
vtkSMProxy *m_px = m_spxm->NewProxy("sources",
"PVTrivialProducer");
vtkSMSourceProxy *m_spx =
vtkSMSourceProxy::SafeDownCast(m_px);
m_spxm->RegisterProxy("sources", m_spx);
vtkObjectBase *obase = m_spx->GetClientSideObject();
vtkPVTrivialProducer *prod =
vtkPVTrivialProducer::SafeDownCast(obase);
prod->SetOutput(m_toplot, m_time); // m_toplot is
a vtkMultiBlockDataSet
m_link->Initialize(m_spxm);
//Update the live side
m_link->InsituUpdate(m_time, m_tstep);
m_spx->UpdatePipeline(m_time);
m_link->InsituPostProcess(m_time,m_tstep);
Thanks,
Simon
VON: Andy Bauer [mailto:[email protected]]
GESENDET: Donnerstag, 6. Juli 2017 17:14
AN: Simon Klarmann
CC: [email protected]
BETREFF: Re: [Paraview] C++ Catalyst vtkSocket::Receive stuck in
loop on Windows
Hi Simon,
Is the Python dependency that you're trying to get rid of on the
Catalyst side or on the pvserver/GUI side? If I remember correctly
on the Catalyst side Python was required for the Live connection.
Cheers,
Andy
On Wed, Jul 5, 2017 at 10:11 AM, Simon Klarmann
<[email protected]> wrote:
Dear Members,
I wanted to get rid of the dependency on Python. The connection by
pure C++ works just fine.
The problem occurs when establishing the live connection to
Paraview, closing Paraview and then try to send some data again.
I tracked it down to the vtkSocket class inside the method Receive.
After the connection is terminated on the Paraview side, e.g. by
closing Paraview, the call of vtkLiveInsituLink::InsituUpdate gets
stuck in the vtkSocket::Receive method. Even though I get a message
that the connection was terminated.
A temporary fix for my case was to replace in Line 609 of the
vtkSocket.cxx if (nRecvd == 0) with if (nRecvd <= 0), because on
disconnection the return value of nRecvd is -1. Then everything
works well.
I only used the following methods in the given order to transfer the
data:
vtkLiveInsituLink::InsituUpdate
vtkSMSourceProxy::UpdatePipeline
vtkLiveInsituLink::InsituPostProcess
Are there further steps to perform or is there a way to check if the
connection is still alive?
Operating System: Windows 7, Visual Studio 2017
Thanks,
Simon
Dipl.-Ing. Simon Klarmann
BAU- UND UMWELTINGENIEURWISSENSCHAFTEN
Technische Universität Darmstadt
Fachgebiet Festkörpermechanik
Tel.: +49 6151 16 – 22642 [2]
Mail: [email protected]
Franziska-Braun-Straße 7
Gebäude L5|01, Raum 542
64287 Darmstadt
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