Chesnay Schepler created FLINK-24193:
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Summary: Test service entries cause noise in other tests
Key: FLINK-24193
URL: https://issues.apache.org/jira/browse/FLINK-24193
Project: Flink
Issue Type: Technical Debt
Components: Tests
Reporter: Chesnay Schepler
Assignee: Chesnay Schepler
Fix For: 1.15.0
At various points in Flink we use the ServiceLoader mechanism to load
implementations, for example filesystems or reporters.
It is thus only natural that we also have some test service implementations
which are used in specific tests.
However, these test implementations are intended to only be used in very
specific tests, but are currently but on the classpath for all tests in that
module (+all that depend on the test-jar of such a module). This causes
confusion (e.g., suddenly there are 5 reporter factories available) or logging
noise (e.g., custom netty handlers being loaded by each MiniCluster).
We should implement a junit extension that runs the test with a customized
classloader, which also as access to a temporary directory containing generated
service entries.
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