Fixed race condition in session cleanup leading to potential deadlocks

Detail name	Value
Changelog Number	24467
Type	Bug
Status	Resolved
Affected Versions	Exasol 8.0.0
Fix Versions	Exasol 8.34.0, Exasol 8.29.9
Resolution Date	2025-04-02

Description

A race condition in the session cleanup handler has been resolved. In scenarios where a session disconnects due to a query timeout and a new command is executed immediately, overlapping cleanup and reconnection processes could block further logins, leading to a partial system deadlock.

Workaround

Avoiding query timeouts for non-interactive users who initiate immediate queries after a timeout can help prevent this issue.

Fix

Database connectivity is not affected by such client reconnects.