[Paraview] WebSocket Connection lost in ParaviewWeb

Arya Mazaheri aryanet at gmail.com
Thu Jan 23 06:36:49 EST 2014 

Yes, I checked that. There are some entries with the following pattern:  
97b94394-7edb-4b9b-b26a-4d76aee49925 pvwserver:9099

Just to let you know, I didn’t create the special group like mentioned in Amazon EC2 tutorial. I made this file’s permission to 777. I hope this wouldn’t be the cause of the problem.


On Wednesday ۲ November ۱۳۹۲ BC at ۷:۱۶ بعدازظهر, Sebastien Jourdain wrote:

> That patch was integrated into the master branch of Apache a while ago, but I was not aware that it made it to the 2.4.7 release.
> So, if you have Apache 2.4.7, you SHOULD NOT patch it.
>  
> The version that you had was correct and should have worked.
> The remaining question is regarding the file: /opt/apache-2.4.7/pv-mapping-file/mapping.txt
>  
> Is that file properly created? Does the content reflect the session id, host and port as expected?  
>  
> Seb
>  
>  
> On Wed, Jan 22, 2014 at 1:36 AM, Arya Mazaheri <aryanet at gmail.com (mailto:aryanet at gmail.com)> wrote:
> > Thanks for mentioning that. I've got stuck in running PW, trying every solution and wondering why it doesn't work!!
> >  
> > Anyway, since I didn't have any other choice I decided to patch my Apache 2.4.7 source and then recompile it. Now, when I try to run the 'make' it throws the following error:
> > mod_rewrite.c: In function ‘is_absolute_uri’:
> > mod_rewrite.c:600: error: duplicate case value
> > mod_rewrite.c:589: error: previously used here
> > mod_rewrite.c:601: error: duplicate case value
> > mod_rewrite.c:590: error: previously used here
> > make[4]: *** [mod_rewrite.slo] Error 1
> > make[4]: Leaving directory `/root/apacheInstall/apache-src/httpd-2.4.7/modules/mappers'
> > make[3]: *** [shared-build-recursive] Error 1
> > make[3]: Leaving directory `/root/apacheInstall/apache-src/httpd-2.4.7/modules/mappers'
> > make[2]: *** [shared-build-recursive] Error 1
> > make[2]: Leaving directory `/root/apacheInstall/apache-src/httpd-2.4.7/modules'
> > make[1]: *** [shared-build-recursive] Error 1
> > make[1]: Leaving directory `/root/apacheInstall/apache-src/httpd-2.4.7'
> > make: *** [all-recursive] Error 1
> >  
> >  
> > Shouldn't I patch my source??
> >  
> >  
> > On Tue, Jan 21, 2014 at 8:12 PM, Scott Wittenburg <scott.wittenburg at kitware.com (mailto:scott.wittenburg at kitware.com)> wrote:
> > > Just wanted to jump in here.  The patch instructions are, strangely, missing from that Amazon EC2 setup documentation.  That's my fault, since I wrote it.  I'll update the documenation with the steps below, which should have been in there all along.  However, I just checked, and the version you're using (2.4.7) already has the patch included, so these steps really only apply to versions 2.4.6 and earlier.  Sorry for the oversight.
> > >  
> > > 1)  Download the patch:
> > >  
> > > wget -O patch.txt https://issues.apache.org/bugzilla/attachment.cgi?id=30886&action=diff&context=patch&collapsed=&headers=1&format=raw
> > >  
> > > 2) Change to the root of the httpd source tree and patch the source:
> > >  
> > > patch -u -p1 < path-to-patch/patch.txt
> > >  
> > >  
> > >  
> > >  
> > > On Tue, Jan 21, 2014 at 4:24 AM, Arya Mazaheri <aryanet at gmail.com (mailto:aryanet at gmail.com)> wrote:
> > > > Thanks for your reply.  
> > > > Previously, I was following the old model approach using apache 2.2. Now, I upgraded to Apache 2.4.7. And followed the Amazon EC2 tutorial. However, now I get the following message in the firebug which the rickshaw.min.js file generated that:
> > > > Firefox can't establish a connection to the server at ws://pvwserver/proxy?sessionId=9521c7c5-d2c6-4e9d-980e-5c7ea9f7dfd4.
> > > >  
> > > > Is it related to the rewriting module? Maybe it's not working! Any idea?
> > > > I've attached my 'pw-config.properties' and 'httpd-vhosts.conf' files to this thread.
> > > >  
> > > > Regards,
> > > >  
> > > >  
> > > > On Mon, Jan 20, 2014 at 10:26 PM, Sebastien Jourdain <sebastien.jourdain at kitware.com (mailto:sebastien.jourdain at kitware.com)> wrote:
> > > > > The web socket forwarding should be handle by Apache at that point and it seems to be done by Jetty?
> > > > > In your jetty configuration, the session URL might not be valid when using Apache as a front-end.
> > > > >  
> > > > > Moreover, which Apache setup did you used? 2.4+ like for the EC2 Amazon documentation or the old one with the Python module?
> > > > >  
> > > > > Seb  
> > > > >  
> > > > >  
> > > > > On Mon, Jan 20, 2014 at 9:24 AM, Arya Mazaheri <aryanet at gmail.com (mailto:aryanet at gmail.com)> wrote:
> > > > > > Hi there,
> > > > > > I've installed ParaviewWeb from source and configured apache to work with jetty. I think I've done every configuration according to the tutorials. But everytime I try to open DataProber application I face with the following error in Jetty console output:
> > > > > >  
> > > > > > > Jan 20, 2014 7:50:18 PM com.kitware.paraviewweb.websocket.WebSocketForwarder (http://web.websocket.WebSocketForwarder) onOpen
> > > > > > > INFO: null
> > > > > > > java.util.concurrent.ExecutionException: java.net.ConnectException: Connection refused
> > > > > > >     at org.eclipse.jetty.websocket.WebSocketClient$WebSocketFuture.get(WebSocketClient.java:569)
> > > > > > >     at org.eclipse.jetty.websocket.WebSocketClient$WebSocketFuture.get(WebSocketClient.java:372)
> > > > > > >     at com.kitware.paraviewweb.websocket.WebSocketForwarder.onOpen (http://web.websocket.WebSocketForwarder.onOpen)(WebSocketForwarder.java:54)
> > > > > > >     at org.eclipse.jetty.websocket.WebSocketConnectionRFC6455.onWebSocketOpen(WebSocketConnectionRFC6455.java:425)
> > > > > > >     at org.eclipse.jetty.websocket.WebSocketServletConnectionRFC6455.handshake(WebSocketServletConnectionRFC6455.java:60)
> > > > > > >     at org.eclipse.jetty.websocket.WebSocketFactory.upgrade(WebSocketFactory.java:309)
> > > > > > >     at org.eclipse.jetty.websocket.WebSocketFactory.acceptWebSocket(WebSocketFactory.java:382)
> > > > > > >     at org.eclipse.jetty.websocket.WebSocketHandler.handle(WebSocketHandler.java:43)
> > > > > > >     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
> > > > > > >     at org.eclipse.jetty.server.Server.handle(Server.java:365)
> > > > > > >     at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:485)
> > > > > > >     at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926)
> > > > > > >     at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988)
> > > > > > >     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:635)
> > > > > > >     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
> > > > > > >     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
> > > > > > >     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628)
> > > > > > >     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
> > > > > > >     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
> > > > > > >     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
> > > > > > >     at java.lang.Thread.run(Thread.java:701)
> > > > > > > Caused by: java.net.ConnectException: Connection refused
> > > > > > >     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> > > > > > >     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:597)
> > > > > > >     at org.eclipse.jetty.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:628)
> > > > > > >     at org.eclipse.jetty.io.nio.SelectorManager$1.run(SelectorManager.java:290)
> > > > > > >     ... 3 more
> > > > > >  
> > > > > > In the firebug, I see the following error:
> > > > > > Connection lost - retrying (1) ..
> > > > > >  
> > > > > > Any ideas?
> > > > > >  
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