bug: Unexpected grpc exception when iterating over result sets in YDB Python SDK

[krasnovdm]

Unexpected grpc exception when iterating over result sets in YDB Python SDK

YDB Python SDK version:

ydb 3.21.2

Current behavior:

When attempting to iterate over result sets in the YDB Python SDK, a grpc._channel._MultiThreadedRendezvous exception is raised instead of the expected ydb.issues exception. This occurs due to temporary connection issues to the server, network overload, or other transient errors.

Expected behavior:

It is expected that the SDK would handle temporary errors and provide a higher-level exception ydb.issues to simplify error handling on the application side.

Steps to reproduce:

• Execute a query to YDB using the Python SDK.
• Attempt to iterate over the result sets.
• Drop connection
• Observe the occurrence of the grpc._channel._MultiThreadedRendezvous exception.

Related code:

Exception raised from

ydb-python-sdk/ydb/_utilities.py

Line 164 in ae2c132

res = self.wrapper(next(self.it))