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Posted to reviews@helix.apache.org by GitBox <gi...@apache.org> on 2020/08/21 22:03:50 UTC

[GitHub] [helix] mgao0 opened a new pull request #1302: Fix test TestCustomizedViewAggregation

mgao0 opened a new pull request #1302:
URL: https://github.com/apache/helix/pull/1302


   ### Issues
   
   - [ ] My PR addresses the following Helix issues and references them in the PR description:
   
   Fixed #1301 
   
   ### Description
   
   - [ ] Here are some details about my PR, including screenshots of any UI changes:
   
   This is a temporary work around for the test failure until we have a design for fixing the root cause. Root cause for the failure is #1296. 
   
   ### Tests
   
   - [ ] The following is the result of the "mvn test" command on the appropriate module:
   
   Ran suite tests three times, this test didn't fail in any run.
   [ERROR] Failures: 
   [ERROR]   TestResourceChangeDetector.testResetSnapshots:431 » ThreadTimeout Method org.t...
   [ERROR]   TestZkConnectionLost.testLostZkConnection » ThreadTimeout Method org.testng.in...
   [ERROR]   TestAssignableInstanceManager.testGetAssignableInstanceMap:115 expected:<true> but was:<false>
   [INFO] 
   [ERROR] Tests run: 1173, Failures: 3, Errors: 0, Skipped: 1
   [INFO] 
   [INFO] ------------------------------------------------------------------------
   [INFO] BUILD FAILURE
   [INFO] ------------------------------------------------------------------------
   [INFO] Total time:  01:29 h
   [INFO] Finished at: 2020-08-21T11:39:34-07:00
   
   ### Commits
   
   - My commits all reference appropriate Apache Helix GitHub issues in their subject lines. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)":
     1. Subject is separated from body by a blank line
     1. Subject is limited to 50 characters (not including Jira issue reference)
     1. Subject does not end with a period
     1. Subject uses the imperative mood ("add", not "adding")
     1. Body wraps at 72 characters
     1. Body explains "what" and "why", not "how"
   
   ### Code Quality
   
   - My diff has been formatted using helix-style.xml 
   (helix-style-intellij.xml if IntelliJ IDE is used)
   


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[GitHub] [helix] zhangmeng916 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
zhangmeng916 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475795185



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,9 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));

Review comment:
       If the case that reduce customized state config won't be tested at all, I suggest to comment out the whole case.




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[GitHub] [helix] mgao0 commented on pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
mgao0 commented on pull request #1302:
URL: https://github.com/apache/helix/pull/1302#issuecomment-679348591


   > What is the root cause?
   
   Please refer to this issue #1296 for the root cause.


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[GitHub] [helix] mgao0 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
mgao0 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475887972



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,9 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));

Review comment:
       Sure. Just updated, please take a look :)




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[GitHub] [helix] kaisun2000 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
kaisun2000 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475952521



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,11 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));
-    validateAggregationSnapshot();
+    // This is commented out as a work around to pass the test
+    // The validation of config change will be done combined with the next several customized state changes
+    // The next validation should only show TYPE_A states aggregated in customized view
+    // Until we fix the issue in routing table provider https://github.com/apache/helix/issues/1296
+//    validateAggregationSnapshot();

Review comment:
       I see, customized view is similar to external view, that a stage in pipeline update it. My question is that for routingProvider, external view based/currentstate based, we should see this kind of removing a parent path of Callbackhandler all the time. Thus reset().  Isn't it a problem before? Is there anything special here?




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[GitHub] [helix] kaisun2000 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
kaisun2000 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475975381



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,11 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));
-    validateAggregationSnapshot();
+    // This is commented out as a work around to pass the test
+    // The validation of config change will be done combined with the next several customized state changes
+    // The next validation should only show TYPE_A states aggregated in customized view
+    // Until we fix the issue in routing table provider https://github.com/apache/helix/issues/1296
+//    validateAggregationSnapshot();

Review comment:
       Sync-ed offline. 
   
   It seems that currentState based RP has one callbackhandler with all currentstate as child znode. Thus reset would refresh all currentstate only once. This is fine. 
   CustomizedView for each type has one callbackHandler. Thus, one removal of callbackhandler parent path would cause other types of customizedView be reset() too. 
   
   In sum, current design of routingProvider accomodate only one callbackhandler. (External view, currentstate). However customized view RP has callbackhandler per type. This does not fit into the current design of RP. 




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[GitHub] [helix] kaisun2000 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
kaisun2000 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475932191



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,11 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));
-    validateAggregationSnapshot();
+    // This is commented out as a work around to pass the test
+    // The validation of config change will be done combined with the next several customized state changes
+    // The next validation should only show TYPE_A states aggregated in customized view
+    // Until we fix the issue in routing table provider https://github.com/apache/helix/issues/1296
+//    validateAggregationSnapshot();

Review comment:
       Still a little bit confused. line 412 is only config change. How does it cause callbackbackhandler parent path removal? 
   
   Do we have one callbackhandler, which type A, B, C are children. Or do we have 3 callbackhandler for A, B, C each?




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[GitHub] [helix] kaisun2000 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
kaisun2000 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475926228



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,11 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));
-    validateAggregationSnapshot();
+    // This is commented out as a work around to pass the test
+    // The validation of config change will be done combined with the next several customized state changes
+    // The next validation should only show TYPE_A states aggregated in customized view
+    // Until we fix the issue in routing table provider https://github.com/apache/helix/issues/1296
+//    validateAggregationSnapshot();

Review comment:
       @mgao0 , help me to understand a little bit more here: 
   
   The removal of customized view would cause empty snapshot. In the test case, where is the removal of customizeView type happening? 




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[GitHub] [helix] mgao0 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
mgao0 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475927729



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,11 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));
-    validateAggregationSnapshot();
+    // This is commented out as a work around to pass the test
+    // The validation of config change will be done combined with the next several customized state changes
+    // The next validation should only show TYPE_A states aggregated in customized view
+    // Until we fix the issue in routing table provider https://github.com/apache/helix/issues/1296
+//    validateAggregationSnapshot();

Review comment:
       @kaisun2000 See the line 148 when we initiate this test, we set the types to be A,B,C. Then in line 412, I set type to be A. So Type B and C are deleted from the config, and controller will get notified of the changes in the config, and not aggregate Type B and C customized states to be included in the customized views any more.




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[GitHub] [helix] mgao0 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
mgao0 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475861961



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,9 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));

Review comment:
       The reduced config is tested, it is just not validated alone, it's validated together with the next several changes.




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[GitHub] [helix] mgao0 commented on pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
mgao0 commented on pull request #1302:
URL: https://github.com/apache/helix/pull/1302#issuecomment-679425708


   This PR is ready to be merged.
   Final commit message: Fix test TestCustomizedViewAggregation.


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[GitHub] [helix] mgao0 commented on pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
mgao0 commented on pull request #1302:
URL: https://github.com/apache/helix/pull/1302#issuecomment-679379516


   > From the description of #1296, I still don't quite understand what caused the issue.
   > 
   > So a finalize() from callback handler causing the routingTableProvider to reset and later update see empty snapshot.
   > 
   > So what caused the finalize? which path?
   
   When we dropped a customized state type (TYPE_C for example), the associated customized view path for this customized state type is deleted, so the callback handler is finalized. An example for the path would be: /cluster_nameE/CUSTOMIZEDVIEW/TYPE_C


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[GitHub] [helix] mgao0 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
mgao0 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475970901



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,11 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));
-    validateAggregationSnapshot();
+    // This is commented out as a work around to pass the test
+    // The validation of config change will be done combined with the next several customized state changes
+    // The next validation should only show TYPE_A states aggregated in customized view
+    // Until we fix the issue in routing table provider https://github.com/apache/helix/issues/1296
+//    validateAggregationSnapshot();

Review comment:
       No we don’t have the same problem for current states. For example if you drop a resource in current states it enters this condition in handleChildChange, because it's not a parent path.
   `else {
             if (!isReady()) {
               // avoid leaking CallbackHandler
               logger.info("Callbackhandler {} with path {} is in reset state. Stop subscription to ZK client to avoid leaking",
                   this, parentPath);
               return;
             }
             NotificationContext changeContext = new NotificationContext(_manager);
             changeContext.setType(NotificationContext.Type.CALLBACK);
             changeContext.setPathChanged(parentPath);
             changeContext.setChangeType(_changeType);
             subscribeForChanges(changeContext.getType(), _path, _watchChild);
             enqueueTask(changeContext);
           }
         }
   `
   So it sends a CALLBACK instead of FINALIZE




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[GitHub] [helix] kaisun2000 commented on pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
kaisun2000 commented on pull request #1302:
URL: https://github.com/apache/helix/pull/1302#issuecomment-679347856


   What is the root cause?


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[GitHub] [helix] kaisun2000 commented on pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
kaisun2000 commented on pull request #1302:
URL: https://github.com/apache/helix/pull/1302#issuecomment-679349377


   I see that #1296 is about slow leadership switch. Why this is the root cause for this test? 


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[GitHub] [helix] kaisun2000 removed a comment on pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
kaisun2000 removed a comment on pull request #1302:
URL: https://github.com/apache/helix/pull/1302#issuecomment-679349377


   I see that #1296 is about slow leadership switch. Why this is the root cause for this test? 


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[GitHub] [helix] mgao0 edited a comment on pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
mgao0 edited a comment on pull request #1302:
URL: https://github.com/apache/helix/pull/1302#issuecomment-679379516


   > From the description of #1296, I still don't quite understand what caused the issue.
   > 
   > So a finalize() from callback handler causing the routingTableProvider to reset and later update see empty snapshot.
   > 
   > So what caused the finalize? which path?
   
   When we dropped a customized state type (TYPE_C for example), the associated customized view path and its children nodes for this customized state type is deleted, so the callback handler is finalized. An example for the path would be: /cluster_name/CUSTOMIZEDVIEW/TYPE_C, /cluster_name/CUSTOMIZEDVIEW/TYPE_C/resource_name


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[GitHub] [helix] mgao0 edited a comment on pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
mgao0 edited a comment on pull request #1302:
URL: https://github.com/apache/helix/pull/1302#issuecomment-679379516


   > From the description of #1296, I still don't quite understand what caused the issue.
   > 
   > So a finalize() from callback handler causing the routingTableProvider to reset and later update see empty snapshot.
   > 
   > So what caused the finalize? which path?
   
   When we dropped a customized state type (TYPE_C for example), the associated customized view path for this customized state type is deleted, so the callback handler is finalized. An example for the path would be: /cluster_name/CUSTOMIZEDVIEW/TYPE_C


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[GitHub] [helix] pkuwm merged pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
pkuwm merged pull request #1302:
URL: https://github.com/apache/helix/pull/1302


   


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[GitHub] [helix] kaisun2000 commented on pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
kaisun2000 commented on pull request #1302:
URL: https://github.com/apache/helix/pull/1302#issuecomment-679394685


   > > From the description of #1296, I still don't quite understand what caused the issue.
   > > So a finalize() from callback handler causing the routingTableProvider to reset and later update see empty snapshot.
   > > So what caused the finalize? which path?
   > 
   > When we dropped a customized state type (TYPE_C for example), the associated customized view path and its children nodes for this customized state type is deleted, so the callback handler is finalized. An example for the path would be: /cluster_name/CUSTOMIZEDVIEW/TYPE_C, /cluster_name/CUSTOMIZEDVIEW/TYPE_C/resource_name
   
   So when customizedview deleting types would cause routingTableProvider listening on the type path to reset(). This is normal flow. But later usage of routingTableProvider would see empty snapshot which is also expected I guess.  But in the code, see my comment in the code, where do the deletion happening?


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[GitHub] [helix] zhangmeng916 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
zhangmeng916 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475879477



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,9 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));

Review comment:
       ok, in that case just document a little more about how this test is performed.




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[GitHub] [helix] mgao0 commented on a change in pull request #1302: Fix test TestCustomizedViewAggregation

Posted by GitBox <gi...@apache.org>.
mgao0 commented on a change in pull request #1302:
URL: https://github.com/apache/helix/pull/1302#discussion_r475934762



##########
File path: helix-core/src/test/java/org/apache/helix/integration/TestCustomizedViewAggregation.java
##########
@@ -410,7 +410,11 @@ public void testCustomizedViewAggregation() throws Exception {
     // Aggregating: Type A
     // Routing table: Type A, Type B, Type C
     setAggregationEnabledTypes(Arrays.asList(CustomizedStateType.TYPE_A));
-    validateAggregationSnapshot();
+    // This is commented out as a work around to pass the test
+    // The validation of config change will be done combined with the next several customized state changes
+    // The next validation should only show TYPE_A states aggregated in customized view
+    // Until we fix the issue in routing table provider https://github.com/apache/helix/issues/1296
+//    validateAggregationSnapshot();

Review comment:
       @kaisun2000 
   Helix controller reads the config and produces customized views. When the controller found from the config that type C has been dropped, it deletes the type C customized views from zk too (everything under /cluster_name/CUSTOMIZEDVIEW/TYPE_C).
   We have one callback handler each for type A, B and C customized view (/cluster_name/CUSTOMIZEDVIEW/TYPE_C) as parent path. We also have one callback handler for each of their children nodes, which is like the example I gave earlier /cluster_name/CUSTOMIZEDVIEW/TYPE_C/resource_name




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