Hi,

We have been using your EO.Pdf.dll - version 3.0.104.2 - date 24/4/2012 15:54.

On our website running on IIS 6 on Windows Server 2003, everytime someone places an order, we generate a PDF document with a barcode in it (by using <img src=''> to the bar code image).

The problem we have is about 1 in every 100 orders causes the following error to occur:
Convertion failed. Failed to initialize conversion.

We have tried everything but it is very hard to reproduce. Can you help us please?
Below is the event viewer details:


Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 7/27/2012 3:42:30 PM
Event time (UTC): 7/27/2012 2:42:30 PM
Event ID: 64070d2733cd45cc84c243f939e229ee
Event sequence: 50071
Event occurrence: 22
Event detail code: 0

Application information:
Application domain: /LM/W3SVC/89/ROOT-1-129878437041465000
Trust level: Full
Application Virtual Path: /

Process information:
Process ID: 10752
Process name: w3wp.exe
Account name: NT AUTHORITY\SYSTEM

Exception information:
Exception type: HtmlToPdfException
Exception message: Convertion failed. Failed to initialize conversion.

Request information:
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\SYSTEM

Thread information:
Thread ID: 14
Thread account name: NT AUTHORITY\SYSTEM
Is impersonating: False
Stack trace: at EO.Pdf.HtmlToPdfException.b(Exception A_0)
at EO.Pdf.Internal.kq.a()
at EO.Pdf.Internal.kq.b()
at EO.Pdf.HtmlToPdf.a(kq A_0)
at EO.Pdf.HtmlToPdf.ConvertHtml(String html, PdfDocument doc)
at Magico.MagiBiz3.Document.ConvertHTMLToPDF(String HTMLToConvert) in C:\SVN\Libraries\Version03.01.01\Trunk\MagiBiz3\Modules\Document.cs:line 1170
at Magico.MagiBiz3.Document.ConvertHTMLToPDF_IntoFile(String HTMLToConvert, String FilePath) in C:\SVN\Libraries\Version03.01.01\Trunk\MagiBiz3\Modules\Document.cs:line 1161
at Magico.MagiBIZGoTemplate.WebsiteCommonCode.Doc_SaveDocumentToFile(MagiBizDocument_Doc CurrentDoc, Guid ReferenceID) in C:\SVN\Websites\MagiBIZTemplate\Trunk\go\_privateAppCode\MagiBizDocument.cs:line 254
at Magico.MagiBIZGoTemplate.MagiShopOrder.CheckForAutoCreateDocuments(Guid CurrentOrderID) in C:\SVN\Websites\MagiBIZTemplate\Trunk\go\_privateAppCode\MagiShopOrder.cs:line 2311
at Magico.MagiBIZGoTemplate.ShopCheckout.OnTabPostValidation(Object o, DetailViewEventArgs e) in C:\SVN\Websites\MagiBIZTemplate\Trunk\Shop_Checkout.aspx.cs:line 2115
at Magico.MagiBIZGoTemplate.MagiBizControl_Tabs.RaiseTabPostValidationEvent(MagiBizTab CurrentTab) in C:\SVN\Websites\MagiBIZTemplate\Trunk\Controls\MagiBizControl_Tabs.ascx.cs:line 762
at Magico.MagiBIZGoTemplate.MagiBizControl_Tabs.DisplayTabs() in C:\SVN\Websites\MagiBIZTemplate\Trunk\Controls\MagiBizControl_Tabs.ascx.cs:line 396
at Magico.MagiBIZGoTemplate.MagiBizControl_Tabs.OnPreRender(EventArgs e) in C:\SVN\Websites\MagiBIZTemplate\Trunk\Controls\MagiBizControl_Tabs.ascx.cs:line 130
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Thank you for your fast response.
Each time this error happens, there is not a second event entry in the event viewer - is there something we need to do to turn this on?

I downloaded the latest version (seems to have been just released in the last 2 days).

However, we have set up a simple stress test environment to try and reproduce this issue where we spin off 10 threads and each thread creates 10 PDF documents one at a time - and these are very large PDF documents with 88 pages in each one. With the new version, there were delays of about 4 minutes to create the first 10 documents across the 10 threads and then the next 10 minutes werent generated for another 2 minutes. And so on.

When I switched back in the 2011.2 version of EO.PDF, it worked fine with each document taking about 5 seconds to generate.

So I think there may be a bug in the new release unfortunately or the HTML that we are using does not seem to work well with the new features in it. So I wont be able to try out the new version to see if that fixes the error.

I have done some more analysis on our issue by looking at the 3 orders where the error was generated over the last week (there were about 100 orders in total so 97 orders worked fine). The error seems to happen approximately 40 seconds after trying to generate the PDF document. But in our stress testing environment, the error has never occurred even once after generating hundreds of documents. Is there anything in a web server environment that would make the dll time raise a "Convertion failed. Failed to initialize conversion" error after approximately 40 seconds?

Hi,

I have more information about this error - I ran a test last night to generate 5,000 very large PDF documents across 10 threads and it fell over with the error after 1,157 documents were created. The error message says:
"Convertion failed: Operation times out"

I looked at our logs and the time taken for each document to be created was 16-42 seconds - I have a suspicion that if it takes more than 45 seconds (or something like that), your component will automatically time out and throw an error.

Is this correct? And if so, is there a setting which makes this longer?

Thanks, Paul