Timeout for hung requests #39

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1. clientsuccessnasdaq commented on Sep 13, 2023

   

   clientsuccessnasdaq

   on Sep 13, 2023 via email

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   -- Please reply above this line -- Dear Nasdaq/data-Link-Python, Thank you for contacting the Nasdaq Data Client Success Team. Your email is very important to us and we will respond to you within 1 to 2 business days. To efficiently support your request, please include relevant details such as the data product/feed you are inquiring about. Kind regards, Nasdaq Data Client Success [1] Links: ------ [1] https://www.nasdaq.com/
2. clientsuccessnasdaq commented on Sep 14, 2023

   

   clientsuccessnasdaq

   on Sep 14, 2023 via email

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   -- Please reply above this line -- Hello, Thank you for contacting us. We are looking into your request and will get back to you soon. Thanks, VAIBHAV TEMBEY Nasdaq Data Client Success  How would you rate my reply? Great [1]    Okay [2]    Not Good [3] Links: ------ [1] https://secure.helpscout.net/satisfaction/647704996/record/7066484955/1/ [2] https://secure.helpscout.net/satisfaction/647704996/record/7066484955/2/ [3] https://secure.helpscout.net/satisfaction/647704996/record/7066484955/3/ On Wed, Sep 13, 2023 at 3:04 PM EDT, Nasdaq/data-Link-Python ***@***.***> wrote:

   …

   WARNING - EXTERNAL EMAIL; EXERCISE CAUTION. Sometimes when downloading a lot of data from NasdaqDataLink, I get a hung connection during the ssl handshake. The requests library, which is being used to make requests, can take a timeout parameter, but this is not exposed through the API as far as I can tell. What's the best way to retry after a timeout? - Reply to this email directly, view it on GitHub [1], or unsubscribe [2]. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***> Links: ------ [1] #39 [2] https://github.com/notifications/unsubscribe-auth/AWYQ644AWJSEYMALXQGWKI3X2H7QVANCNFSM6AAAAAA4W5LXP4
3. clientsuccessnasdaq commented on Sep 18, 2023

   

   clientsuccessnasdaq

   on Sep 18, 2023 via email

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   -- Please reply above this line -- Hello, Thanks for your patience. Can you please share with us the exact error message you receive? It would also be helpful if you could share with us the code as well. Thanks, VAIBHAV TEMBEY Nasdaq Data Client Success  How would you rate my reply? Great [1]    Okay [2]    Not Good [3] Links: ------ [1] https://secure.helpscout.net/satisfaction/647704996/record/7076792905/1/ [2] https://secure.helpscout.net/satisfaction/647704996/record/7076792905/2/ [3] https://secure.helpscout.net/satisfaction/647704996/record/7076792905/3/ On Thu, Sep 14, 2023 at 12:50 PM EDT, Client Success - Nasdaq Data ***@***.***> wrote:

   …

   Hello, Thank you for contacting us. We are looking into your request and will get back to you soon. Thanks, VAIBHAV TEMBEY Nasdaq Data Client Success  > On Wed, Sep 13, 2023 at 3:04 PM EDT, Nasdaq/data-Link-Python ***@***.***> wrote: > > WARNING - EXTERNAL EMAIL; EXERCISE CAUTION. > > Sometimes when downloading a lot of data from NasdaqDataLink, I get a > hung connection during the ssl handshake. The requests library, which > is being used to make requests, can take a timeout parameter, but this > is not exposed through the API as far as I can tell. > > What's the best way to retry after a timeout? > > - > Reply to this email directly, view it on GitHub [1], or unsubscribe > [2]. > You are receiving this because you are subscribed to this > thread.Message ID: > ***@***.***> > > Links: > ------ > [1] #39 > [2] > https://github.com/notifications/unsubscribe-auth/AWYQ644AWJSEYMALXQGWKI3X2H7QVANCNFSM6AAAAAA4W5LXP4 > > > >
4. christian-oudard commented on Dec 15, 2025

   

   christian-oudard

   on Dec 15, 2025

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   The error is that sometimes the request simply does not complete. This is normal and expected some percentage of the time for networked applications.

   I forked the library and added a timeout parameter. This allows me to do this is in my code:

   def ndl_get_table_with_retry(table, **kwargs):
       timeouts = [5, 10, 20, 40, 80]
   
       last_error = None
       for attempt, timeout in enumerate(timeouts):
           try:
               return ndl.get_table(table, timeout=timeout, **kwargs)
           except Exception as e:
               last_error = e
               error_msg = str(e).lower()
               # Don't retry on auth errors or invalid requests
               if 'unauthorized' in error_msg or 'api key' in error_msg:
                   raise
               if 'invalid' in error_msg and 'ticker' in error_msg:
                   raise
               # Log retry attempt
               if attempt < len(timeouts) - 1:
                   print(f"  Nasdaq API timeout ({timeout}s), retrying with {timeouts[attempt + 1]}s timeout...")
               time.sleep(1)  # Brief pause before retry
   
       # All retries exhausted
       raise TimeoutError(
           f"Nasdaq Data Link API failed after {len(timeouts)} attempts "
           f"(timeouts: {timeouts}). Last error: {last_error}"
       )