[Java][Client] 2.7.2 regression. MultiTopicsConsumer org.apache.pulsar.client.api.PulsarClientException$NotSupportedException: not support shrink topic partitions

Describe the bug After upgrading java client to 2.7.2 version we started to notice following logs:

2021-05-26 18:00:39.236 ERROR 11646 --- [r-client-io-1-1] o.a.p.c.impl.MultiTopicsConsumerImpl     : [persistent://public/batch/embedded_ROUTING1_bdcccf7eeaec7f5e0e7d243451433ac2ae8506d4] not support shrink topic partitions. old: 1, new: 0
2021-05-26 18:00:39.237  WARN 11646 --- [r-client-io-1-1] o.a.p.c.impl.MultiTopicsConsumerImpl     : [MultiTopicsConsumer-f03d6] Failed to subscribe increased topics partitions: org.apache.pulsar.client.api.PulsarClientException$NotSupportedException: not support shrink topic partitions

This happens couple of minutes of not pushing new messages to listened topic. Another consequence of that are exceptions when trying to ack message that was in progress coming from that consumer:

org.apache.pulsar.client.api.PulsarClientException$InvalidMessageException: null
	at org.apache.pulsar.client.impl.ConsumerBase.acknowledgeAsync(ConsumerBase.java:373)

Expected behavior There should be no errors.

Additional context After upgrading server and java client to 2.7.2 version from 2.7.1 version, but it’s problem in java client.

[MichalKoziorowski-TomTom]

I guess that issue can be somehow related to that change: https://github.com/apache/pulsar/pull/9660

[congbobo184]

https://github.com/apache/pulsar/pull/10708 has fix it and cherry-pick to 2.7, release 2.7.3, so close it.