### Motivation Fixed flaky test :
``` Skip Message expected [0] but found [4] Standard Output Created annotation listener 13:24:36.970 [main:org.apache.pulsar.broker.PulsarService@319] INFO org.apache.pulsar.broker.PulsarService - Starting Pulsar Broker service; version: '2.2.0.0-SNAPSHOT' 13:24:36.982 [main:org.apache.pulsar.broker.PulsarService@320] INFO org.apache.pulsar.broker.PulsarService - Git Revision b4b348da6dade88fbf08bc8f49e28f280455d985 13:24:36.984 [main:org.apache.pulsar.broker.PulsarService@321] INFO org.apache.pulsar.broker.PulsarService - Built by <> on asf902.gq1.y ...[truncated 42534 chars]... position3:28:-1:4 data [B@6507f56b 13:24:43.543 [TestNG-method=testBatchAndNonBatchCumulativeAcks-1:org.apache.pulsar.broker.service.BatchMessageTest@563] INFO org.apache.pulsar.broker.service.BatchMessageTest - [bnb-sub-1] got message position3:29:-1 data [B@4ebac723 13:24:43.543 [TestNG-method=testBatchAndNonBatchCumulativeAcks-1:org.apache.pulsar.broker.service.BatchMessageTest@569] INFO org.apache.pulsar.broker.service.BatchMessageTest - [bnb-sub-1] did cumulative ack on position3:29:-1 ``` Core issue is that the acks are by default grouped with 100ms delay. The `Thread.sleep(100)` was not enough to cover for that. ### Modifications Removed ack grouping for this test. [ Full content available at: https://github.com/apache/pulsar/pull/2661 ] This message was relayed via gitbox.apache.org for [email protected]
