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Qlik Databricks connection error "Unexpected response from server during a HTTP connection: Could not refill buffer"

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Andreas_Giesbrecht

Qlik Databricks connection error "Unexpected response from server during a HTTP connection: Could not refill buffer"

Last Update:

May 10, 2022 3:15:54 PM

Updated By:

Jamie_Gregory

Created date:

Jun 30, 2021 4:49:50 AM

You may encounter the following issue when trying to connect to Databricks using the Qlik Databricks connector from the ODBC connector package or via ODBC system DSN:

"Error message: Please check the values for Username‚ Password‚ Host and other properties. Description: General error

ERROR [HY000] [Qlik][ThriftExtension] (14) Unexpected response from server during a HTTP connection: Could not refill buffer."

Andreas_Giesbrecht_0-1625041582107.png

 

 

Environment

  • Qlik Sense on premise all versions
  • Qlik Sense SAAS

 

Resolution

The issue can be solved by enabling SSL using System Trust Store:

Andreas_Giesbrecht_0-1625042596484.png

or own certificate (especially for the SAAS version):

Andreas_Giesbrecht_1-1625042691487.png

 

Cause 

The cause of this behavior is that the data source requires SSL.

Related Content 

https://community.qlik.com/t5/Knowledge-Base/Qlik-Sense-SAAS-Apache-Spark-connector-quot-Unexpected-...

 

 

Comments
shaun_lombard
Creator II
Creator II

Followed the above and now receive the error below on QSEoW:

ERROR [HY000] [Qlik][ThriftExtension] (14) Unexpected response from server during a HTTP connection: SSL_connect: certificate verify failed.

Sonja_Bauernfeind
Digital Support
Digital Support

Hello @shaun_lombard 

I would recommend posting about this issue in our Qlik Sense Data Connectivity forum, where you can make use of better visibility and our active users and support engineers.

All the best,
Sonja 

ca386807
Contributor II
Contributor II

Thank you for this.  When I enable SSL, I receive a new error:

 

ERROR [HY000] [Qlik][ThriftExtension] (14) Unexpected response from server during a HTTP connection: SSL_read: Resource temporarily unavailable.

 

What might be the cause for this error?

 

Thanks for your time.

Andreas_Giesbrecht

Hi @ca386807 

Please open a Support case in order to get more clarity and provide the following details in the case:

1) Which version of Qlik are you using?

2) Has the connection ever worked before?

3) Please confirm if the connection works via ODBC System DSN using a Databricks ODBC driver?

4) Where is Databricks running? on Azure? 

5) Please provide screenshots of the new error message.

6) How does your connector config look like? Please provide detailed screenshots.

Thank you

Version history
Last update:
‎2022-05-10 03:15 PM
Updated by: