Github user cestella commented on a diff in the pull request:
https://github.com/apache/metron/pull/624#discussion_r124998536
--- Diff:
metron-interface/metron-rest/src/test/java/org/apache/metron/rest/controller/KafkaControllerIntegrationTest.java
---
@@ -61,6 +62,7 @@
private static final int KAFKA_RETRY = 10;
@Autowired
private KafkaComponent kafkaWithZKComponent;
+ private ComponentRunner runner;
--- End diff --
I looked at it a bit this morning and @justinleet is right, it's not easily
done. I'm not super happy about spinning up and down components per test-case
considering the bulk of this PR has been around removing exactly that. That
being said, the test is ~20s, so I'm not going to lose any sleep over it on
that regard.
I think the part that I don't like most is the mixture of semantics between
Spring's wiring of components and JUnit's setting up of components that we
can't mix and match. It leaves a muddle, frankly:
* If someone needs more heavy-weight components in other tests in this
project, they will be *forced* into spinning up and down infrastructure per
test-case, which has proven costly and was a prominent thing that we targeted
in this PR for removal.
* Our approach leaves us doing component reuse in a way that is neither
standard based on the other components *nor* standard based on spring, which is
confusing and will inevitably lead to inefficient and confusing tests.
There is evidently a fix from spring
[here](https://github.com/spring-projects/spring-kafka/issues/194) and I'm
creating [METRON-1009](https://issues.apache.org/jira/browse/METRON-1009) to
capture the reversion of this unit test and uptaking the fix provided by spring.
@merrimanr is right, it's not a requirement to get this perfect as long as
we've removed the intermittent nature of the test failure (and I feel we have).
It's not so bad that I am -1, but it's ugly, confusing and it will lead to
errors in the future IMO.
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