BUG: Race condition when use PrintoutReport?

[damianbobrowski]

Describe the bug

PS E:\debug\printout_report> python .\example.py
Connecting to server...
Traceback (most recent call last):
  File "E:\debug\printout_report\example.py", line 17, in <module>
    PrintoutReport.exportToPDF(2, PDF_REPORTS_DIR / f"2.pdf")
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python311\Lib\site-packages\RSTAB\Reports\printoutReport.py", line 29, in exportToPDF
    model.clientModel.service.export_printout_report_to_pdf(report_id, target_file_path)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python311\Lib\site-packages\suds\client.py", line 559, in __call__
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python311\Lib\site-packages\suds\client.py", line 658, in send
    result = self.succeeded(binding, reply.message)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python311\Lib\site-packages\suds\client.py", line 696, in succeeded
    reply, result = binding.get_reply(self.method, reply)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python311\Lib\site-packages\suds\bindings\binding.py", line 152, in get_reply
    self.detect_fault(soapbody)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python311\Lib\site-packages\suds\bindings\binding.py", line 183, in detect_fault      
    raise WebFault(p, fault)
suds.WebFault: b"Server raised fault: 'Failed to export a report with the following error: Cannot export data to the printout report 'C:/Users/Administrator/AppData/Local/Dlubal/RSTAB9_9.02/instanceV2_7040_133324233331675213/cxemodel_rs9_0/content/reports/Demo2_2.rpr', because export process is already in progress.'"

To Reproduce
Happens randomly when want to export multiple reports. Assuming connected model has defined printout reports with id 1, 2, then sometimes it is possible to meet error with script

from pathlib import Path
from RSTAB.initModel import Model
from RSTAB.Reports.printoutReport import PrintoutReport

BASE_DIR = Path(__file__).resolve().parent
PRINTOUT_REPORTS_DEDICATED_DIR = BASE_DIR / "printout_reports"
PDF_REPORTS_DIR = PRINTOUT_REPORTS_DEDICATED_DIR / "pdf"
PDF_REPORTS_DIR.mkdir(parents=True, exist_ok=True)
HTML_REPORTS_DIR = PRINTOUT_REPORTS_DEDICATED_DIR / "html"
HTML_REPORTS_DIR.mkdir(parents=True, exist_ok=True)

Model(False,'cxe-model')

# loop is intentional to create error
for i in range(6):
    PrintoutReport.exportToPDF(1, PDF_REPORTS_DIR / f"1.pdf")
    PrintoutReport.exportToPDF(2, PDF_REPORTS_DIR / f"2.pdf")
    
    PrintoutReport.exportToHTML(1, HTML_REPORTS_DIR / f"1.html")
    PrintoutReport.exportToHTML(2, HTML_REPORTS_DIR / f"2.html")

Expected behavior
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Screenshots
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Desktop (please complete the following information):

• Version of WIN10 OS: [WIN 10 ]
• Version of RSTAB9
• Version of tool [e.g. 1.7]

Additional context
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[OndraMichal]

Hi @damianbobrowski,
I think this can happen because there is a progress bar in RFEM and the user cannot start another process. Whereas in WS there is no such restriction so sometimes another command can be run. This should be resolved in RFEM, although temporarily I would add a condition and wait for the file to be created before the next export, so you can continue your work.

[damianbobrowski]

Hello @OndraMichal

I think this can happen because there is a progress bar in RFEM and the user cannot start another process. Whereas in WS there is no such restriction so sometimes another command can be run.

Sounds like a correct diagnose / first point to check. This is what we can observe using Desktop application: script or specific method finish execution, but few second letter progress bar still showing pending export process.

although temporarily I would add a condition and wait for the file to be created before the next export, so you can continue your work

Yep, temporarily we go this way.

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But I am wondering can this happens only during export, so generic solution on RSTAB/RFEM is needed? What I can expect is this can happen in any WS request, unless specific resources can be accessed simultaneously.
Report template files from ...content/reports/Demo2_2.rpr seems to be not accessed simultaneously, and there can be similar scenarios when using WS for totally different requests.

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@OndraMichal
thank you for your answer, then I can continue my work in suggested direction.

[OndraMichal]

Hi @damianbobrowski,
I think this can happen in any lengthy process, but as you suggested in WS or SOAP for that matter, these should not exist. Bug 103589.

[damianbobrowski]

This should be resolved in RFEM, although temporarily I would add a condition and wait for the file to be created before the next export, so you can continue your work.

Next to file existence it is also important to check: is file stop increase size. (Writing process)
It lead me to different errors until I figured it out