merlimat opened a new pull request #5439: Multiple unit tests improvements URL: https://github.com/apache/pulsar/pull/5439 ### Motivation Unit tests for `pulsar-broker` module have a very disappointing success rate, many flaky tests and a very long execution time. To improve situation, we need to: * Fix most egregious flaky tests * Reuse JVM forks when running tests. Currently we're spinning up a new JVM for *each* test class. That takes a huge amount of CPU time. * Run tests in parallel. Many tests are doing something and then waiting for something to happen. We can reduce execution by running in parallel ### Modifications * Fixed service port conflicts * Avoid the ZK session watcher to take down the JVM when it fail to talk with ZK * Make sure we release all the resources at the end of the tests
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