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Threading Issue with EDIBlackBox

Posted: 03/11/2013 18:00:09
by Sam Wilkinson (Basic support level)
Joined: 02/28/2013
Posts: 5

I am currently evaluating EDIBlackBox and have started testing multiple-threads and have found that it does not appear to support multiple threads when calling TElAS2Receipt.Load(..) even when a new TElAS2Receipt instance is created per thread (as per http://www.eldos.com/security/articles/3995.php?sphrase_id=426790).

I have attached a zip file (renamed as .txt) with a Visual Studio 2012 Console Application demonstrating the issue.

The sample application builds up a list of data to process (content & certificates).
Then it utilizes the Parallel.ForEach(...) method (.net feature) to run a method to parse the AS2Receipt contents.

Parallel.ForEach(data, (entry) =>
    ParseReceipt(entry.Item1, entry.Item2);

It is failing in this section of code.
    TElAS2Receipt receipt = new TElAS2Receipt();
    receipt.Signature.CertStorage = certificates;
    receipt.Load(content); // <-- this fails
catch (Exception ex)

It works fine loading each file without doing any threading, but fails doing multiple threads.

Can you please advise on how I should go about loading each AS2Receipt file contents from streams in separate threads.

If this is a bug, does the same bug exist in TElAS2Message.Load(..)

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Posted: 03/12/2013 00:52:21
by Eugene Mayevski (Team)

Sam Wilkinson wrote:
but fails doing multiple threads.

Please specify what exactly "fails" mean in your particular case.

Sincerely yours
Eugene Mayevski
Posted: 03/12/2013 01:08:41
by Sam Wilkinson (Basic support level)
Joined: 02/28/2013
Posts: 5

It throws an EElASMessageError exception on the line I indicated above with the message "No content type specified (error code is 10009)".

The AS2Receipt messages it is parsing are valid (because it can load them individually one at a time without any threading), but when threading is involved (as per the sample application) then it throws the exception.

Below is a copy of the exception detail from Visual Studio.
SBASCommon.EElASMessageError was caught
  Message=No content type specified (error code is 10009)
       at SBASCommon.TElASReceipt.ProcessError(Int32 Code, String Message, Boolean Critical)
       at SBASCommon.TElASReceipt.DisassembleHeader(TElMessageHeader Header, UInt16& Scopes)
       at SBAS2.TElAS2Receipt.DisassembleHeader(TElMessageHeader Header, UInt16& Scopes)
       at SBASCommon.TElASReceipt.Load(Stream Stream)
       at TestMulti.Program.ParseReceipt(MemoryStream content, TElMemoryCertStorage certificates) in c:\TestMulti\Program.cs:line 52
Posted: 03/12/2013 02:10:07
by Eugene Mayevski (Team)

Thank you. These details are very helpful. I have carried out a couple of tests and so far the problem doesn't seem to be in our code. It looks more like a compiler glitch. Unfortunately, due to complexity of the MIME parser, it will take some time to locate and fix the issue. Simple debugging doesn't work well with that code.

I am moving the topic to the helpdesk so that our developers could respond you when there are any news regarding the problem.

Sincerely yours
Eugene Mayevski



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