[Building Sakai] Portal Chat error message

[Matthew Jones]

This is a good tip Adrian. I had seen this occasionally too locally and
just ignored the error. It seems like in a typical Sakai production install
you can also just disable the IPv6 addresses completely on the internal
network, which seems like it should get a java app to work more reliably.
(There are lots of tips out there for this
http://superuser.com/a/693132/354846)

My ISP (like most? http://test-ipv6.com/faq_no_ipv6.html) isn't even
assigning my an IPv6 at all yet anyway.


On Wed, Sep 3, 2014 at 5:51 AM, Adrian Fish <adrian.r.fish at gmail.com> wrote:

> Hi Omer,
>
> I'm having similar problems here at Lancaster. I suspect it's something to
> do with multicast and am currently exploring some options which I'll report
> back on when I get somewhere. One thing that seems to get mentioned quite a
> lot on the web is the fact that Java comes with IPv6 and IPv4 stacks and
> that it may be worth trying adding "-Djava.net.preferIPv4Stack=true" to
> your JAVA_OPTS. I've not tried that yet.
>
> Cheers,
> Adrian.
>
>
> On 29 August 2014 18:09, Omer A Piperdi <omer at rice.edu> wrote:
>
>> We are seeing quite a few error message like below in catalina.out and
>> few of our users complain about pop-up message saying "Chat server
>> unavailable".
>> Any idea or suggestion on this message? This is on sakai-10.x.
>>
>> Thanks
>> Omer
>>
>> ------------------
>> 2014-08-28 12:08:32,643 ERROR http-bio-8443-exec-220
>>
>> org.sakaiproject.entitybroker.impl.external.SakaiExternalIntegrationProvider
>> - Direct request failure: RuntimeException:Fatal error trying to execute
>> custom action method: latestData:show:handleLatestData:Direct request
>> failure: RuntimeException:Fatal error trying to execute custom action
>> method: latestData:show:handleLatestData:
>>   Sakai version: 10-SNAPSHOT(TRUNK)
>>
>> Server: sakai.rice.edu(sakai-n3) [sakai-n3-1409135115519]
>>
>> Request URI:
>> /direct/portal-chat/xxxx-61c2-4012-b336-3f0570b50f26/latestData.json
>>   Path Info:
>> /portal-chat/xxxxx-61c2-4012-b336-3f0570b50f26/latestData.json
>>   Context path: /direct
>>   Method: GET
>>
>> Server: sakai-n3-1409135115519
>>   User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0)
>> Gecko/20100101 Firefox/31.0
>>   Browser ID: Win-Mozilla
>>   IP address: xxx.42.206.5
>>   User ID: xxxxxxxxx-61c2-4012-b336-3f0570b50f26
>>   User EID: xxxx
>>   User Display ID: xxxx
>>
>> Full stacktrace:
>> RuntimeException:Fatal error trying to execute custom action method:
>> latestData:show:handleLatestData:
>> java.lang.RuntimeException: Fatal error trying to execute custom action
>> method: latestData:show:handleLatestData
>>          at
>>
>> org.sakaiproject.entitybroker.rest.EntityActionsManager.handleCustomActionExecution(EntityActionsManager.java:231)
>>          at
>>
>> org.sakaiproject.entitybroker.rest.EntityActionsManager.handleCustomActionRequest(EntityActionsManager.java:96)
>>          at
>>
>> org.sakaiproject.entitybroker.rest.EntityHandlerImpl.handleEntityAccess(EntityHandlerImpl.java:403)
>>          at
>>
>> org.sakaiproject.entitybroker.util.servlet.DirectServlet.dispatch(DirectServlet.java:183)
>>          at
>>
>> org.sakaiproject.entitybroker.servlet.SakaiDirectServlet.dispatch(SakaiDirectServlet.java:146)
>>          at
>>
>> org.sakaiproject.entitybroker.util.servlet.DirectServlet.handleRequest(DirectServlet.java:154)
>>          at
>>
>> org.sakaiproject.entitybroker.util.servlet.DirectServlet.service(DirectServlet.java:132)
>>          at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
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