[jira] [Created] (FLINK-40662) 'Run kubernetes Materialized Table test' fails on release-2.3 because the SQL Gateway returns a null session handle

["Martijn Visser (Jira)" <ji...@apache.org>]

Martijn Visser created FLINK-40662:
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             Summary: 'Run kubernetes Materialized Table test' fails on release-2.3 because the SQL Gateway returns a null session handle
                 Key: FLINK-40662
                 URL: https://issues.apache.org/jira/browse/FLINK-40662
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Gateway
    Affects Versions: 2.3.0
            Reporter: Martijn Visser


The e2e script waits for the gateway, gets {{SqlGateway REST endpoint is up.}}, and then the session it opens comes back empty, so every following request is sent to the literal path {{null}}:

{code}
Sep 14 10:00:03 SqlGateway REST endpoint is up.
Sep 14 10:00:03 [INFO] Create a new session
Sep 14 10:00:05 [INFO] Session Handle null
Sep 14 10:00:05 [INFO] Create catalog & database
Sep 14 10:00:05 Configure session null create catalog if not exists test_catalog with (...) failed: {"errors":["org.apache.flink.runtime.rest.handler.RestHandlerException: Bad request, could not parse parameters: Cannot resolve path parameter (session_handle) from value \"null\"."]}
{code}

{code}
Sep 14 10:00:16 [FAIL] Test script contains errors.
Sep 14 10:00:16 [FAIL] 'Run kubernetes Materialized Table test' failed after 1 minutes and 21 seconds! Test exited with exit code 1 and the logs contained errors, exceptions or non-empty .out files
{code}

Two earlier gateway starts in the same run came up in one to two seconds and worked, so the endpoint being reachable is not enough on its own here.

First seen on the 2026-09-12 nightly, the 2026-09-11 nightly was still clean. Five of the twelve release-2.3 Azure runs in the window hit it:

https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=79037
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=79029
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=79020
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=79010
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=79002

FLINK-40123 and FLINK-39132 are the same script failing for other reasons.



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