sandynz opened a new issue #12476:
URL: https://github.com/apache/shardingsphere/issues/12476
## Bug Report
### Which version of ShardingSphere did you use?
5.0.0-RC1-SNAPSHOT
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Scaling
### Expected behavior
Unit test not blocked.
### Actual behavior
`assertThat(event.getType(), is(DataChangedEvent.Type.ADDED));` fail
randomly.
Unit test blocked.
From GitHub CI log:
```
[Curator-SafeNotifyService-0] o.a.c.f.l.MappingListenerManager - Listener
(org.apache.curator.framework.recipes.cache.CuratorCacheListenerBuilderImpl$2@24ebbdf)
threw an exception
java.lang.AssertionError:
Expected: is <ADDED>
but: was <UPDATED>
at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)
at org.junit.Assert.assertThat(Assert.java:956)
at org.junit.Assert.assertThat(Assert.java:923)
at
org.apache.shardingsphere.scaling.core.api.impl.GovernanceRepositoryAPIImplTest.lambda$assertWatch$0(GovernanceRepositoryAPIImplTest.java:91)
```
### Reason analyze (If you can)
In `GovernanceRepositoryAPIImplTest.java`
```
@Test
public void assertWatch() throws InterruptedException {
CountDownLatch countDownLatch = new CountDownLatch(1);
String key = ScalingConstant.SCALING_ROOT + "/1";
governanceRepositoryAPI.watch(ScalingConstant.SCALING_ROOT, event ->
{
if (event.getKey().equals(key)) {
assertThat(event.getType(), is(DataChangedEvent.Type.ADDED));
countDownLatch.countDown();
}
});
governanceRepositoryAPI.persist(key, "");
countDownLatch.await();
}
```
1, If `assertThat` throw exception, `countDownLatch.await();` will always be
blocked.
2, Repository key is the same in unit test methods, and value is persisted.
See test log:
```
[INFO ] 2021-09-16 12:07:34.817 [main]
o.a.s.s.c.a.i.GovernanceRepositoryAPIImplTest - assertWatch, key=/scaling/1
value=assertGetChildrenKeys
[INFO ] 2021-09-16 12:07:34.919 [Curator-SafeNotifyService-0]
o.a.s.s.c.a.i.GovernanceRepositoryAPIImplTest -
event=DataChangedEvent(key=/scaling/1, value=assertWatch, type=ADDED)
```
In `CuratorZookeeperRepository.java`
```
private Type getChangedType(final TreeCacheEvent.Type type) {
switch (type) {
case NODE_ADDED:
return Type.ADDED;
case NODE_UPDATED:
return Type.UPDATED;
case NODE_REMOVED:
return Type.DELETED;
default:
return Type.IGNORED;
}
}
```
TreeCacheEvent type depends on whether path is locally cached or not, it
could be `ADDED` or `UPDATED`.
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
Throw exception in `assertWatch`'s `watch` listener.
### Example codes for reproduce this issue (such as a github link).
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