sepuri sai krishna created FLINK-40675:
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Summary:
SqlGatewayServiceITCase.testReleaseLockWhenFailedToSubmitOperation is unstable
Key: FLINK-40675
URL: https://issues.apache.org/jira/browse/FLINK-40675
Project: Flink
Issue Type: Bug
Components: Table SQL / Gateway
Reporter: sepuri sai krishna
testReleaseLockWhenFailedToSubmitOperation fails intermittently on master CI:
{noformat}
org.apache.flink.table.gateway.api.utils.SqlGatewayException: Failed to
submitOperation.
at
org.apache.flink.table.gateway.service.SqlGatewayServiceImpl.submitOperation(SqlGatewayServiceImpl.java:150)
at
org.apache.flink.table.gateway.service.SqlGatewayServiceITCase.testReleaseLockWhenFailedToSubmitOperation(SqlGatewayServiceITCase.java:962)
Caused by: org.apache.flink.table.gateway.api.utils.SqlGatewayException: Failed
to submit the operation to the thread pool.
Caused by: java.util.concurrent.RejectedExecutionException: Task ... rejected
from java.util.concurrent.ThreadPoolExecutor@21fc80c2[Running, pool size = 500,
active threads = 500, queued tasks = 0, completed tasks = 13]
{noformat}
It failed in 15 runs on 14 different days between 2026-07-23 and 2026-09-14, in
the Default (Java 17), Java 11, Java 21, Hadoop 3.4.3 and AdaptiveScheduler
profiles. Recent examples:
* https://github.com/apache/flink/actions/runs/34798011374/job/103837838497
* https://github.com/apache/flink/actions/runs/34666551863/job/103482148054
* https://github.com/apache/flink/actions/runs/33724735397/job/100553329795
FLINK-38439 reported the same failure in 2025 and was closed because it had
only happened once.
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