Luke Chen created KAFKA-15507:
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Summary: adminClient should not throw retriable exception when
closing instance
Key: KAFKA-15507
URL: https://issues.apache.org/jira/browse/KAFKA-15507
Project: Kafka
Issue Type: Bug
Components: admin
Affects Versions: 3.5.1
Reporter: Luke Chen
When adminClient is closing the instance, it'll first set `hardShutdownTimeMs`
to a positive timeout value, and then wait until existing threads to complete
within the timeout. However, within this waiting, when new caller tries to
invoke new commend in adminClient, it'll immediately get an
{code:java}
TimeoutException("The AdminClient thread is not accepting new calls.")
{code}
There are some issues with the design:
1. Since the `TimeoutException` is a retriable exception, the caller will enter
a tight loop and keep trying it
2. The error message is confusing. What does "the adminClient is not accepting
new calls" mean?
We should improve it by throwing a non-retriable error (ex:
IllegalStateException), then, the error message should clearly describe the
adminClient is closing.
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