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fix(server) Fix cacheEventListener in CachedSystemTransactionV2 #2619

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close #2617

Use the listening mechanism of server ->pd to clear the local schema cache upon receiving schema change events from pd;

@dosubot dosubot bot added size:M This PR changes 30-99 lines, ignoring generated files. pd PD module labels Aug 6, 2024
@VGalaxies VGalaxies self-requested a review August 6, 2024 04:47
@haohao0103 haohao0103 changed the title fix[server] Fix cacheEventListener in CachedSystemTransactionV2 fix(server) Fix cacheEventListener in CachedSystemTransactionV2 Aug 6, 2024
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codecov bot commented Aug 17, 2024

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.

Project coverage is 35.99%. Comparing base (ba5b89e) to head (ffd4d16).
Report is 232 commits behind head on master.

Files with missing lines Patch % Lines
...in/java/org/apache/hugegraph/meta/MetaManager.java 0.00% 11 Missing ⚠️
...graph/backend/cache/CachedSchemaTransactionV2.java 0.00% 4 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (ba5b89e) and HEAD (ffd4d16). Click for more details.

HEAD has 2 uploads less than BASE
Flag BASE (ba5b89e) HEAD (ffd4d16)
5 3
Additional details and impacted files
@@              Coverage Diff              @@
##             master    #2619       +/-   ##
=============================================
- Coverage     46.84%   35.99%   -10.86%     
+ Complexity      343      302       -41     
=============================================
  Files           719      719               
  Lines         58465    58450       -15     
  Branches       7495     7491        -4     
=============================================
- Hits          27387    21037     -6350     
- Misses        28306    35087     +6781     
+ Partials       2772     2326      -446     

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Comment on lines -145 to -147
if (!schemaEventHub.containsListener(Events.CACHE)) {
schemaEventHub.listen(Events.CACHE, this.cacheEventListener);
}
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Deleting these codes will cause the test to report the error: Not found listener for cache...

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thanks, i can't find the specific error information. could you tell me how to locate wehre the error occurred ?

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schemaEventHub.listen(Events.CACHE, this.cacheEventListener);
}
// Listen cache event: "cache.clear", ...
MetaManager.instance().listenSchemaCacheClear((e) -> {
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removing this.cacheEventListener will cause resource leak when unlistenChanges()

@@ -242,7 +251,19 @@ public <T> void listenGraphClear(Consumer<T> consumer) {
}

public <T> void listenSchemaCacheClear(Consumer<T> consumer) {
this.graphMetaManager.listenSchemaCacheClear(consumer);
if (isListenerInitialized(SCHEMA_CLEAR_KEY)) {
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not sure why registering listener when isListenerInitialized(), do you mean isListenerNotInitialized()?

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yes,it is isListenerNotInitialized()

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Due to the lack of activity, the current pr is marked as stale and will be closed after 180 days, any update will remove the stale label

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inactive pd PD module size:M This PR changes 30-99 lines, ignoring generated files.
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[Bug] cacheEventListener in CachedSchemaTransactionV2 Work does not meet expectations
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