[Paraview] WebSocket Connection lost in ParaviewWeb

Sebastien Jourdain sebastien.jourdain at kitware.com
Thu Jan 23 09:01:56 EST 2014 

Does the apache "user" can read that file?
Are all the directories above that file "executable" for that user?

Try by switching to that user and check if you can "cat"  that file.

Seb


On Thu, Jan 23, 2014 at 4:36 AM, Arya Mazaheri <aryanet at gmail.com> wrote:

> 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> 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> 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> 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> 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> 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.paraview
> 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
> (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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