Bug: Exclude unnecessary dependencies introduced by caffeine update to 2.9.2
Status: Resolved
Priority: Normal
Resolution: Fixed
Created: 04/Oct/23 10:04
Resolved: 06/Oct/23 10:02

When I checked out the latest code with CASSANDRA-18805 in, I noticed that it pulls these dependencies:

{code}
[resolver:resolve] Downloading https://repo1.maven.org/maven2/com/github/ben-manes/caffeine/caffeine/3.1.8/caffeine-3.1.8.pom
[resolver:resolve] Downloaded https://repo1.maven.org/maven2/com/github/ben-manes/caffeine/caffeine/3.1.8/caffeine-3.1.8.pom (3 KB at 8.7 KB/sec)
[resolver:resolve] Downloading https://repo1.maven.org/maven2/org/checkerframework/checker-qual/3.37.0/checker-qual-3.37.0.pom
[resolver:resolve] Downloaded https://repo1.maven.org/maven2/org/checkerframework/checker-qual/3.37.0/checker-qual-3.37.0.pom (3 KB at 127.9 KB/sec)
[resolver:resolve] Downloading https://repo1.maven.org/maven2/com/google/errorprone/error_prone_annotations/2.21.1/error_prone_annotations-2.21.1.pom
[resolver:resolve] Downloaded https://repo1.maven.org/maven2/com/google/errorprone/error_prone_annotations/2.21.1/error_prone_annotations-2.21.1.pom (2 KB at 119.3 KB/sec)
[resolver:resolve] Downloading https://repo1.maven.org/maven2/com/google/errorprone/error_prone_parent/2.21.1/error_prone_parent-2.21.1.pom
[resolver:resolve] Downloaded https://repo1.maven.org/maven2/com/google/errorprone/error_prone_parent/2.21.1/error_prone_parent-2.21.1.pom (13 KB at 658.5 KB/sec)
[resolver:resolve] Downloading https://repo1.maven.org/maven2/org/hdrhistogram/HdrHistogram/2.1.12/HdrHistogram-2.1.12.pom
[resolver:resolve] Downloaded https://repo1.maven.org/maven2/org/hdrhistogram/HdrHistogram/2.1.12/HdrHistogram-2.1.12.pom (0 B at 0.0 KB/sec)
[resolver:resolve] Resolving artifacts
[resolver:resolve] Downloading https://repo1.maven.org/maven2/com/github/ben-manes/caffeine/caffeine/3.1.8/caffeine-3.1.8.jar
[resolver:resolve] Downloading https://repo1.maven.org/maven2/org/checkerframework/checker-qual/3.37.0/checker-qual-3.37.0.jar
[resolver:resolve] Downloading https://repo1.maven.org/maven2/com/google/errorprone/error_prone_annotations/2.21.1/error_prone_annotations-2.21.1.jar
[resolver:resolve] Downloading https://repo1.maven.org/maven2/org/hdrhistogram/HdrHistogram/2.1.12/HdrHistogram-2.1.12.jar
[resolver:resolve] Downloaded https://repo1.maven.org/maven2/org/hdrhistogram/HdrHistogram/2.1.12/HdrHistogram-2.1.12.jar (0 B at 0.0 KB/sec)
[resolver:resolve] Downloaded https://repo1.maven.org/maven2/com/google/errorprone/error_prone_annotations/2.21.1/error_prone_annotations-2.21.1.jar (17 KB at 219.1 KB/sec)
[resolver:resolve] Downloaded https://repo1.maven.org/maven2/org/checkerframework/checker-qual/3.37.0/checker-qual-3.37.0.jar (220 KB at 2490.9 KB/sec)
[resolver:resolve] Downloaded https://repo1.maven.org/maven2/com/github/ben-manes/caffeine/caffeine/3.1.8/caffeine-3.1.8.jar (869 KB at 6679.8 KB/sec)
{code}

Notice there is checker-qual and error_prone_annotations

If you do this on the current cassandra-5.0:
{code}
find . -type f -name '*.java' | xargs grep 'import .*\.Nullable;' | cut -d ':' -f2 | sort | uniq
{code}

you will get

{code}
import org.checkerframework.checker.nullness.qual.Nullable;
import javax.annotation.Nullable;
{code}

The first import is wrong. We should not use that, we should use just javax.annotation.Nullable.

The reason why it is possible to use that import is that it is on the classpath. Even worse, it is also added into libs which is not necessary at all.

error_prone_annotations are compile-time annotations and checker-qual are too. We do not need them in Cassandra at all. They are dependencies which are brought there from caffeine.