Bug 426096

Comment 1 Samy Abou-Shama 2014-01-20 05:58:43 EST

We have a RAP Application based on RAP 1.5. 

We have received complaints from our customers, that they are getting the attached http 500 error (see screenshot). 

It only happens with IE browsers (probably only IE 8).
Some Customers are using Firefox as workarround. 

It seems like the error occurs without any user intercation (background calls). It can be however, that due to the timeout, the user only thinks that there was no interaction.

Debugging is not that easy since we do not have a Testenvironment where we can reproduce this error!

Comment 2 Samy Abou-Shama 2014-01-20 06:00:45 EST

Created attachment 239131 [details]
Screenshot of the Stacktrace

Comment 3 Samy Abou-Shama 2014-01-20 06:03:48 EST

Please note:
In the original 1.5 RAP Version, the IllegalStateException thrown does not include the root cause. We had to create a pathed RAP Version to get to the SocketTimeoutException 
From the log of the patched version we also found, that the read json string is still '' when Exception occurs

Comment 4 Ralf Sternberg 2014-01-20 10:31:07 EST

It seems that other frameworks have similar issues [2, 3] and tracked it down to be caused by IE bug KB895954 [3]. This problem affects IE 6 .. IE 8. A hotfix is included in IE7 and IE8, but it has to be explicitly enabled as explained in section "How to enable this hotfix" [3].

[4] suggests that changing tomcat to use the NIO connector instead of APR could work around the problem.

[1] http://dojo-toolkit.33424.n3.nabble.com/Infrequent-ajax-errors-with-IE-td3991257.html
[2] http://dev.vaadin.com/ticket/8001
[3] http://support.microsoft.com/kb/895954
[4] http://tomcat.10.x6.nabble.com/Chasing-a-SocketTimeoutException-with-APR-td4667588.html

Comment 5 Samy Abou-Shama 2014-01-27 04:43:46 EST

Thank you Ralf, 

I have tested the NIO Connector on one of the buggy Tomat-Installations. First Tests have shown, that this solutions works :-)

We will test on other machines.

Samy

Comment 6 Samy Abou-Shama 2014-01-29 06:23:11 EST

An other customer has succesfully tested the official MS BugFix activation in the registry [1]. 

We will now ask all our customers with this issue to do the same. 
The NIO Connector on Tomcat is a nice alternative, but we prefer to fix the MS bug the MS way :-)

Thank you for your efforts. From my point of view, this fixes this bug report.

[1] http://support.microsoft.com/kb/895954

Comment 7 Ivan Furnadjiev 2014-01-29 06:33:11 EST

Close as NOT_ECLIPSE.