Moved sessions may cause resource leakage in the connection server on the main cluster
Details
| Detail name | Value |
|---|---|
| Changelog Number | 26999 |
| Type | Bug |
| Status | Resolved |
| Affected Versions | Exasol 8.16.0 |
| Fix Versions | Exasol 2025.1.5, Exasol 2025.2.0 |
| Resolution Date | 2025-12-05 |
Description
Some resources for moved sessions (i.e. using CONTROL MOVE SESSION or CONTROL MOVE ALL SESSIONS) are not cleaned up properly if the session ends on a worker cluster. This can lead to resource leakage in the connection server on the main cluster and may end with the connection server on the main cluster being unavailable due to an out-of-memory situation. This can result in connections to Exasol not being able to be established.
The issue will likely only be noticeable and/or cause issues if many sessions have been moved.
Workaround
No workaround available besides not using CONTROL MOVE commands.
Fix
The resources are cleaned up properly to avoid resource issues on the main cluster.
