[Paraview] WebSocket Connection lost in ParaviewWeb

Arya Mazaheri aryanet at gmail.com
Wed Jan 22 03:36:50 EST 2014 

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.paraviewweb.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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>>>
>>
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