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Before trying anything else check you are:

  • using Python 3

  • using the most up to date version of the CDS API

These 2 things cause 90% of issues experienced so we recommend to double check both these factors first

If you

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are still experiencing

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issues it's time to look at the error messages.


WARNING Recovering from connection error [HTTPSConnectionPool(host='cds.climate.copernicus.eu', port=443): 

Max retries exceeded with url: /api/v2/tasks/7b4e735b-5a79-4913-bbcb-cebc0c65b420 (Caused by ConnectTimeoutError(<urllib3.connection.VerifiedHTTPSConnection object at 0x7f81056e8940>, 'Connection to cds.climate.copernicus.eu timed out. (connect timeout=60)'))], attempts 12 of 500

What type of error are you seeing?

'Timed out' or ‘Proxy’

If you're seeing an error message which mentions 'timed out' like the example below:Timed Out



WARNING Recovering from connection error [HTTPSConnectionPool(host='cds.climate.copernicus.eu', port=443): 

Max retries exceeded with url: /api/v2/tasks/7b4e735b-5a79-4913-bbcb-cebc0c65b420 (Caused by ConnectTimeoutError(<urllib3.connection.VerifiedHTTPSConnection object at

...

 0x7f81056e8940>, 'Connection to cds.climate.copernicus.eu timed out. (connect timeout=60)'))], attempts 12 of 500



Diagnosis: This is likely due to network issues causing delays in the communication between the your system and the CDS.

Solution: The best way round this is to add the "timeout=600" (or longer) option for the timeout duration in seconds, to your CDS API request :

c =cdsapi.Client(timeout=600,quiet=False,debug=True)



If the message mentions ‘Cannot connect to proxy’ 

WARNING Recovering from connection error [HTTPSConnectionPool(host='cds.climate.copernicus.eu', port=443): Max retries exceeded with url: /api/v2/resources/cems-fire-historical (Caused by ProxyError('Cannot connect to proxy.', timeout('_ssl.c:835: The handshake operation timed out',)))], attempts 0of 500


Diagnosis: This could also be due to the network issues causing delays in the communication between the your system and the CDS.  Therefore we recommend to try this solution first  

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