Problems with concurrency tests using Crystal Reports for VS 2005

Question

Post Author: condeagustin
CA Forum: General Feedback
Hi
My name is Agustin and Im using Crystal Reports for VS 2005
and NET 2.0 to generate pdf files. This is the scenario:
I created a COM+ object in c# and everytime the
COM+ creates an instance of this object, the following flow is executed:
it reads an xml file from a database, then it feeds the report with this
xml file, afterwards it generates a pdf file and finally this pdf file is
inserted into the database. Both fields (xml and pdf fields) are varbinary in the
same table in sql server 2005. All the flow from reading the xml to inserting
the pdf into the database is executed in memory, it never goes to the hard
disk. In other words both the xml and the pdf file are stored in memory (the
RAM). That is the only function of that COM+ object and I already have it in a
production server and it works GREAT!!
The PROBLEM is the concurrency tests. I made the following tests
in the same production server:
1. First I went to the registry and I set the PrintJobLimit to
100 in HKEY_LOCAL_MACHINESOFTWARECrystal Decisions10.2Report Application
ServerServer
2. I shut down the object in the COM+ and I executed 100
threads all at the same time. Each thread created one instance of the object in
the COM+ and the 100 pdfs were generated SUCCESFULLY in 5 minutes!!
3. Then I executed again 100 threads (WITHOUT shutting down the
object in the com+). 10 pdfs were generated succesfully but the rest were
never generated and there was no exception because my object was NEVER
INSTANTIADED in the COM+, I mean, the 90 instances were never created in the
COM+, so my object was never executed, THAT IS MY PROBLEM!! Do I have to
modify something in the registry files of crystal reports to fix this? What can
I do? I have revised the code in that object a LOT OF TIMES and believe me,
everything is being closed and disposed at the end (the memory streams, the
ReportClass objects, the connection to the database, even the dataset used to
store the data of the xml file!
So to sum up the problem is not with the execution of my object
(cause once is created the object works great and the pdf is generated
perfectly!), the problem is with the com+ TRYING to create another instance
of my object given that test scenario. Help me please, What do you
suggest?
The production server has this specifications:
Operative System: Windows Server 2003 Enterprise Edition with Service Pack 2
Processor: Dual Core AMD Opteron 2212 2.00GHz
RAM: 820MB
Hard drive: It is partitioned in 2 drives --> C
drive has 20GB and D has 60GB
Note: Each generated pdf has only one page and if you bring it
to disk its maximum size is 56KB
I hope your answer and thank you
Agustín Conde Martí

Answer 1

Post Author: John Werner Enoksen
CA Forum: General Feedback
Hi, im about to write a simular solution where I will use VS2008/Com+ to be in compliance to an existing solition written in VB6.0, so I was googling to look for bumps. Did you figure this one out?
Best regards,
John Werner