Server side error thrown if the profile trace gets over 4MB (2,097,152 characters)

[GoogleCodeExporter]

We have a few pages with complex SQL operations and lots of profiled steps, 
when we attempt to profile these pages we get an error:

[InvalidOperationException: Error during serialization or deserialization using 
the JSON JavaScriptSerializer. The length of the string exceeds the value set 
on the maxJsonLength property.]
   System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat) +924778
   MvcMiniProfiler.MiniProfiler.ToJson(MiniProfiler profiler) in C:\Users\sam\Desktop\mvc-mini-profiler\MvcMiniProfiler\MiniProfiler.cs:494
   MvcMiniProfiler.UI.MiniProfilerHandler.Results(HttpContext context) in C:\Users\sam\Desktop\mvc-mini-profiler\MvcMiniProfiler\UI\MiniProfilerHandler.cs:204
   MvcMiniProfiler.UI.MiniProfilerHandler.ProcessRequest(HttpContext context) in C:\Users\sam\Desktop\mvc-mini-profiler\MvcMiniProfiler\UI\MiniProfilerHandler.cs:133
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +625
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +270

We can get by this in our own code with a config setting (See more at 
http://msdn.microsoft.com/en-us/library/bb763183.aspx):
<configuration>
  <system.web.extensions>
    <scripting>
      <webServices>
        <jsonSerialization maxJsonLength="2147483647"/>
      </webServices>
    </scripting>
  </system.web.extensions>
</configuration>

However the mini profiler seems to ignore this, probably because it's using the 
Javascript serialiser directly.

I think the fix is to change line 394 of \MvcMiniProfiler\MiniProfiler.cs from

    var result = new JavaScriptSerializer().Serialize(profiler);

To

    var result = new JavaScriptSerializer{ MaxJsonLength = int.MaxValue }.Serialize(profiler);

I've applied this fix to a clone at 
http://code.google.com/r/keithhenry-bugfixes/source/detail?r=7fd4635ed41cd195ee1
9b924ee6c2cbf1799294f

Original issue reported on code.google.com by keithhe...@gmail.com on 2 Sep 2011 at 8:43

[GoogleCodeExporter]

Also as a patch: http://code.google.com/p/mvc-mini-profiler/issues/detail?id=106

Original comment by keithhe...@gmail.com on 5 Sep 2011 at 7:39

[GoogleCodeExporter]

I'm experiencing the same issue, do you know when the update will be available 
at NuGet

Original comment by marko.hu...@gmail.com on 20 Sep 2011 at 4:51

[GoogleCodeExporter]

When Sam updates it I guess, but you can download the patch to your own copy in 
the meantime.

Original comment by keithhe...@gmail.com on 20 Sep 2011 at 9:09

[GoogleCodeExporter]

fixed it now 

Original comment by sam.saff...@gmail.com on 14 Feb 2012 at 4:54

• Changed state: Fixed

[GoogleCodeExporter]

Is this really fixed? 
I just get the same exception with the current release.
From the elmah log:

System.InvalidOperationException: Error during serialization or deserialization 
using the JSON JavaScriptSerializer. The length of the string exceeds the value 
set on the maxJsonLength property.
   at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat)
   at StackExchange.Profiling.MiniProfiler.ToJson(MiniProfiler profiler) in C:\Users\sam\Desktop\MiniProfiler\StackExchange.Profiling\MiniProfiler.cs:line 374
   at StackExchange.Profiling.UI.MiniProfilerHandler.Results(HttpContext context) in C:\Users\sam\Desktop\MiniProfiler\StackExchange.Profiling\UI\MiniProfilerHandler.cs:line 302
   at StackExchange.Profiling.UI.MiniProfilerHandler.ProcessRequest(HttpContext context) in C:\Users\sam\Desktop\MiniProfiler\StackExchange.Profiling\UI\MiniProfilerHandler.cs:line 131
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Original comment by aprja...@gmail.com on 20 Dec 2012 at 9:33

[GoogleCodeExporter]

I can confirm it's not fixed in 2.0.4

Original comment by zombie.c...@gmail.com on 28 Dec 2012 at 8:26

[GoogleCodeExporter]

Same here. Getting the error in the MiniProfiler version that's currently on 
nuget (published June 2012). 

Original comment by gisc...@gmail.com on 5 Feb 2013 at 8:11

[GoogleCodeExporter]

The default is set to 2097152 characters in MiniProfiler.Settings.cs

But you can override this with something like:

MiniProfiler.Settings.MaxJsonResponseSize = 2147483647

Original comment by ianfrase...@gmail.com on 25 Feb 2013 at 3:50

[GoogleCodeExporter]

The issue is still persisting...
Error during serialization or deserialization using the JSON 
JavaScriptSerializer. The length of the string exceeds the value set on the 
maxJsonLength property

Original comment by sanjayma...@gmail.com on 17 Aug 2015 at 11:42