clintropolis commented on issue #14502:
URL: https://github.com/apache/druid/issues/14502#issuecomment-1613663559
I'll share my notes since I've been slowly working my way through this!
Equalsverifier based tests fail with:
```
Java 20 (64) is not supported by the current version of Byte Buddy which
officially supports Java 18 (62) - update Byte Buddy or set
net.bytebuddy.experimental as a VM property
```
which is resolved by manually adding the newest version of byte-buddy to the
pom (I also updated both equalsverifier and mockito to latest versions which
also have transient dependencies on byte-buddy).
Before updating easymock we also see some failures of this form
```
[ERROR]
org.apache.druid.segment.writeout.FileWriteOutBytesTest.writeBufferSmallerThanCapacityShouldIncrementSizeCorrectly
Time elapsed: 0 s <<< ERROR!
java.lang.IllegalArgumentException: Unsupported class file major version 64
```
which go away after updating easymock, however I am still seeing a failure
on the latest version of easymock:
```
[ERROR]
org.apache.druid.query.aggregation.constant.LongConstantBufferAggregatorTest.testAggregate
Time elapsed: 0.018 s <<< ERROR!
java.lang.IllegalArgumentException: Could not create type
at org.easymock.bytebuddy.TypeCache.findOrInsert(TypeCache.java:170)
at
org.easymock.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
at
org.easymock.internal.ClassProxyFactory.createProxy(ClassProxyFactory.java:136)
at org.easymock.internal.MocksControl.createMock(MocksControl.java:108)
at org.easymock.internal.MocksControl.createMock(MocksControl.java:81)
at org.easymock.IMocksControl.mock(IMocksControl.java:44)
at org.easymock.EasyMock.mock(EasyMock.java:70)
...
Caused by: java.lang.IllegalStateException:
java.lang.IncompatibleClassChangeError: class
org.easymock.mocks.ByteBuffer$$$EasyMock$1 cannot inherit from sealed class
java.nio.ByteBuffer
```
which is as far as i've got so far, I think maybe easymock hasn't been
updated to be cool with java 20, as
https://github.com/easymock/easymock/releases has an older version of bytebuddy
than i recently added.
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