nicoloboschi opened a new pull request, #15638:
URL: https://github.com/apache/pulsar/pull/15638
### Motivation
There are some tests that occasionally fails with non-sense mockito errors
like this one:
```
org.apache.pulsar.broker.PulsarServerException:
org.mockito.exceptions.misusing.WrongTypeOfReturnValue:
BrokerService cannot be returned by getConfiguration()
getConfiguration() should return ServiceConfiguration
***
If you're unsure why you're getting above error read on.
Due to the nature of the syntax above problem might occur because:
1. This exception *might* occur in wrongly written multi-threaded tests.
Please refer to Mockito FAQ on limitations of concurrency testing.
2. A spy is stubbed using when(spy.foo()).then() syntax. It is safer to stub
spies -
- with doReturn|Throw() family of methods. More in javadocs for
Mockito.spy() method.
at
org.apache.pulsar.broker.service.BrokerService.close(BrokerService.java:685)
at
java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:710)
at
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
Caused by: org.mockito.exceptions.misusing.WrongTypeOfReturnValue:
BrokerService cannot be returned by getConfiguration()
getConfiguration() should return ServiceConfiguration
***
If you're unsure why you're getting above error read on.
Due to the nature of the syntax above problem might occur because:
1. This exception *might* occur in wrongly written multi-threaded tests.
Please refer to Mockito FAQ on limitations of concurrency testing.
2. A spy is stubbed using when(spy.foo()).then() syntax. It is safer to stub
spies -
- with doReturn|Throw() family of methods. More in javadocs for
Mockito.spy() method.
at
org.apache.pulsar.broker.PulsarService.getConfiguration(PulsarService.java:608)
at
org.apache.pulsar.broker.service.BrokerService.shutdownEventLoopGracefully(BrokerService.java:846)
at
java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:710)
at
org.apache.pulsar.broker.service.BrokerService.shutdownEventLoopGracefully(BrokerService.java:846)
at
org.apache.pulsar.broker.service.BrokerService.closeAsync(BrokerService.java:757)
at
java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:710)
at
org.apache.pulsar.broker.service.BrokerService.closeAsync(BrokerService.java:720)
at
org.apache.pulsar.broker.service.BrokerService.close(BrokerService.java:680)
... 2 more
```
After investigating I noticed that MetadataStore threads can still receive
notifications even if the current test method is finished. Also other thread
pools are not shutdown in the correct way and the test must wait for their
terminations in order to avoid mixing up Mockito mocked objects.
### Modifications
- Enhanced `ManagedLedgerFactoryImpl#closeAsync` method
- PulsarService#close sync method now wait for EventLoopGroup to be
terminated
- Introduced new method closeAsync for CoordinationService class to enhance
parallelism while disposing resources in PulsarService and tests
- Fixed a couple of tests which manually create executors and Netty event
loop groups
This is related to past flaky-tests like:
- https://github.com/apache/pulsar/issues/13808
- https://github.com/apache/pulsar/pull/14006
- https://github.com/apache/pulsar/issues/13620
fix #15774
- [x] `no-need-doc`
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