After update client from 4.0.0 to 4.0.7 (to include change to resolve issue where DLQ producer name conflict) we got exception:

org.apache.pulsar.client.api.PulsarClientException$FeatureNotSupportedException: The feature of getting partitions without auto-creation is not supported by the broker. Please upgrade the broker to version that supports PIP-344 to resolve this issue.

Looking at the code, i see something like

useFallbackForNonPIP344Brokers

it seems like from 4.0.7 no longer support falling back? what version from 4.0.0 to 4.07 that have the DLQ producer name conflict fix but still supporting fallback for non PIP-344 broker?

Did you test with recently released 4.0.8 ? It includes https://github.com/apache/pulsar/pull/24822, however it might not address the problem.

There is a related discussion on the mailing list: • https://lists.apache.org/thread/tpd2kgl4v3x8bkw0skv0nj38rzrk56t7 • https://lists.apache.org/thread/j34tnt2o555rwdr9fdbxht05rp4h5pbk

There is a related discussion on the mailing list:

• https://lists.apache.org/thread/tpd2kgl4v3x8bkw0skv0nj38rzrk56t7

• https://lists.apache.org/thread/j34tnt2o555rwdr9fdbxht05rp4h5pbk

Thanks @萧易客. confirming: I assume we fixed this in 3.0.15/4.0.8/4.1.2 releases with https://github.com/apache/pulsar/pull/24822?

> I assume we fixed this in 3.0.15/4.0.8/4.1.2 Yes, confirmed.

After updating to 4.0.8, the problem is gone. Thanks for the replies.