[Tests] Fix flaky WrongTypeOfReturnValue Mockito misuse issue in broker tests #13621

lhotari · 2022-01-05T09:43:59Z

Motivation

Mockito spy creation fails sporadically and causes an exception and Mockito misuse warning:

Error:  Tests run: 83, Failures: 22, Errors: 0, Skipped: 41, Time elapsed: 13.054 s <<< FAILURE! - in org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest
Error:  setup(org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest)  Time elapsed: 0.088 s  <<< FAILURE!
org.mockito.exceptions.misusing.WrongTypeOfReturnValue: 

BrokerService$MockitoMock$967912326 cannot be returned by getPulsarResources()
getPulsarResources() should return PulsarResources
***
If you're unsure why you're getting above error read on.
Due to the nature of the syntax above problem might occur because:
1. This exception *might* occur in wrongly written multi-threaded tests.
   Please refer to Mockito FAQ on limitations of concurrency testing.
2. A spy is stubbed using when(spy.foo()).then() syntax. It is safer to stub spies - 
   - with doReturn|Throw() family of methods. More in javadocs for Mockito.spy() method.

	at org.apache.pulsar.broker.service.PersistentTopicTest.setup(PersistentTopicTest.java:209)
	at org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest.setup(PersistentTopicStreamingDispatcherTest.java:34)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
	at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:61)
	at org.testng.internal.ConfigInvoker.invokeConfigurationMethod(ConfigInvoker.java:366)
	at org.testng.internal.ConfigInvoker.invokeConfigurations(ConfigInvoker.java:320)
	at org.testng.internal.TestInvoker.runConfigMethods(TestInvoker.java:701)
	at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:527)
	at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174)
	at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
	at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:822)
	at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:147)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
	at org.testng.TestRunner.privateRun(TestRunner.java:764)
	at org.testng.TestRunner.run(TestRunner.java:585)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:384)
	at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378)
	at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337)
	at org.testng.SuiteRunner.run(SuiteRunner.java:286)
	at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
	at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
	at org.testng.TestNG.runSuitesSequentially(TestNG.java:1218)
	at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
	at org.testng.TestNG.runSuites(TestNG.java:1069)
	at org.testng.TestNG.run(TestNG.java:1037)
	at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:135)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.executeSingleClass(TestNGDirectoryTestSuite.java:112)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.executeLazy(TestNGDirectoryTestSuite.java:123)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.execute(TestNGDirectoryTestSuite.java:90)
	at org.apache.maven.surefire.testng.TestNGProvider.invoke(TestNGProvider.java:146)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)

Additional context

The exception message gives this hint:

If you're unsure why you're getting above error read on.
Due to the nature of the syntax above problem might occur because:
1. This exception *might* occur in wrongly written multi-threaded tests.
   Please refer to Mockito FAQ on limitations of concurrency testing.
2. A spy is stubbed using when(spy.foo()).then() syntax. It is safer to stub spies - 
   - with doReturn|Throw() family of methods. More in javadocs for Mockito.spy() method.

the doReturn family of methods is already used so it must be some other problem.

The assumption of the solution in this PR is that when an instance spy is replaced with a mock that internally creates the spy instance using the given class and constructor arguments would solve the issue.

Modifications

add the following utility method for creating spies with the given class and constructor arguments:

public static <T> T spyWithClassAndConstructorArgs(Class<T> classToSpy, Object... args) {
    return Mockito.mock(classToSpy, Mockito.withSettings()
            .useConstructor(args)
            .defaultAnswer(Mockito.CALLS_REAL_METHODS));
}

replace spy creation the pulsar-broker tests with the usage of spyWithClassAndConstructorArgs

…lue issue in broker tests - replace spying of a instance with a spy created by Mockito with given constructor arguments

lhotari · 2022-01-05T13:41:17Z

This is to also fix issues like this:

Error:  Tests run: 69, Failures: 1, Errors: 0, Skipped: 55, Time elapsed: 11.343 s <<< FAILURE! - in org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest
Error:  setup(org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest)  Time elapsed: 0.107 s  <<< FAILURE!
org.mockito.exceptions.base.MockitoException: Unable to create mock instance of type 'ServerCnx'
	at org.apache.pulsar.broker.service.PersistentTopicTest.setup(PersistentTopicTest.java:211)
	at org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest.setup(PersistentTopicStreamingDispatcherTest.java:34)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
	at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:61)
	at org.testng.internal.ConfigInvoker.invokeConfigurationMethod(ConfigInvoker.java:366)
	at org.testng.internal.ConfigInvoker.invokeConfigurations(ConfigInvoker.java:320)
	at org.testng.internal.TestInvoker.runConfigMethods(TestInvoker.java:701)
	at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:527)
	at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174)
	at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
	at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:822)
	at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:147)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
	at org.testng.TestRunner.privateRun(TestRunner.java:764)
	at org.testng.TestRunner.run(TestRunner.java:585)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:384)
	at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378)
	at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337)
	at org.testng.SuiteRunner.run(SuiteRunner.java:286)
	at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
	at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
	at org.testng.TestNG.runSuitesSequentially(TestNG.java:1218)
	at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
	at org.testng.TestNG.runSuites(TestNG.java:1069)
	at org.testng.TestNG.run(TestNG.java:1037)
	at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:135)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.executeSingleClass(TestNGDirectoryTestSuite.java:112)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.executeLazy(TestNGDirectoryTestSuite.java:123)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.execute(TestNGDirectoryTestSuite.java:90)
	at org.apache.maven.surefire.testng.TestNGProvider.invoke(TestNGProvider.java:146)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
Caused by: org.mockito.creation.instance.InstantiationException: 
Unable to create instance of 'ServerCnx$MockitoMock$1579413196'.
Please ensure the target class has a constructor that matches these argument types: [org.apache.pulsar.broker.PulsarService$MockitoMock$1968480223] and executes cleanly.
	... 36 more
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedConstructorAccessor231.newInstance(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at org.mockito.internal.util.reflection.ReflectionMemberAccessor.lambda$newInstance$0(ReflectionMemberAccessor.java:26)
	at org.mockito.internal.util.reflection.ReflectionMemberAccessor.newInstance(ReflectionMemberAccessor.java:26)
	at org.mockito.internal.util.reflection.ReflectionMemberAccessor.newInstance(ReflectionMemberAccessor.java:17)
	at org.mockito.internal.creation.instance.ConstructorInstantiator.invokeConstructor(ConstructorInstantiator.java:69)
	at org.mockito.internal.creation.instance.ConstructorInstantiator.withParams(ConstructorInstantiator.java:52)
	at org.mockito.internal.creation.instance.ConstructorInstantiator.newInstance(ConstructorInstantiator.java:38)
	at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMock(SubclassByteBuddyMockMaker.java:48)
	at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:29)
	at org.powermock.api.mockito.mockmaker.PowerMockMaker.createMock(PowerMockMaker.java:41)
	at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:53)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:62)
	at org.mockito.Mockito.mock(Mockito.java:1951)
	at org.apache.pulsar.broker.service.PersistentTopicTest.setup(PersistentTopicTest.java:211)
	at org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest.setup(PersistentTopicStreamingDispatcherTest.java:34)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	... 34 more
Caused by: java.lang.NullPointerException
	at org.apache.pulsar.broker.service.ServerCnx.<init>(ServerCnx.java:233)
	at org.apache.pulsar.broker.service.ServerCnx.<init>(ServerCnx.java:229)
	at org.apache.pulsar.broker.service.ServerCnx$MockitoMock$1579413196.<init>(Unknown Source)
	... 55 more

This problem persisted after making #13608 change.

michaeljmarshall

LGTM

codelipenghui · 2022-01-06T15:06:54Z

@lhotari I have tried to cherry-pick this PR into branch-2.8, but there are many conflicts with branch-2.8. Do you want to push a PR to branch-2.8 directly?

lhotari · 2022-01-06T19:27:43Z

@lhotari I have tried to cherry-pick this PR into branch-2.8, but there are many conflicts with branch-2.8. Do you want to push a PR to branch-2.8 directly?

@codelipenghui I can deal with it next week.

codelipenghui · 2022-01-10T14:58:29Z

Thanks @lhotari

gaozhangmin · 2022-01-28T09:09:48Z

This is to also fix issues like this:

Error:  Tests run: 69, Failures: 1, Errors: 0, Skipped: 55, Time elapsed: 11.343 s <<< FAILURE! - in org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest
Error:  setup(org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest)  Time elapsed: 0.107 s  <<< FAILURE!
org.mockito.exceptions.base.MockitoException: Unable to create mock instance of type 'ServerCnx'
	at org.apache.pulsar.broker.service.PersistentTopicTest.setup(PersistentTopicTest.java:211)
	at org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest.setup(PersistentTopicStreamingDispatcherTest.java:34)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
	at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:61)
	at org.testng.internal.ConfigInvoker.invokeConfigurationMethod(ConfigInvoker.java:366)
	at org.testng.internal.ConfigInvoker.invokeConfigurations(ConfigInvoker.java:320)
	at org.testng.internal.TestInvoker.runConfigMethods(TestInvoker.java:701)
	at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:527)
	at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174)
	at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
	at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:822)
	at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:147)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
	at org.testng.TestRunner.privateRun(TestRunner.java:764)
	at org.testng.TestRunner.run(TestRunner.java:585)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:384)
	at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378)
	at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337)
	at org.testng.SuiteRunner.run(SuiteRunner.java:286)
	at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
	at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
	at org.testng.TestNG.runSuitesSequentially(TestNG.java:1218)
	at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
	at org.testng.TestNG.runSuites(TestNG.java:1069)
	at org.testng.TestNG.run(TestNG.java:1037)
	at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:135)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.executeSingleClass(TestNGDirectoryTestSuite.java:112)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.executeLazy(TestNGDirectoryTestSuite.java:123)
	at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.execute(TestNGDirectoryTestSuite.java:90)
	at org.apache.maven.surefire.testng.TestNGProvider.invoke(TestNGProvider.java:146)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
Caused by: org.mockito.creation.instance.InstantiationException: 
Unable to create instance of 'ServerCnx$MockitoMock$1579413196'.
Please ensure the target class has a constructor that matches these argument types: [org.apache.pulsar.broker.PulsarService$MockitoMock$1968480223] and executes cleanly.
	... 36 more
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedConstructorAccessor231.newInstance(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at org.mockito.internal.util.reflection.ReflectionMemberAccessor.lambda$newInstance$0(ReflectionMemberAccessor.java:26)
	at org.mockito.internal.util.reflection.ReflectionMemberAccessor.newInstance(ReflectionMemberAccessor.java:26)
	at org.mockito.internal.util.reflection.ReflectionMemberAccessor.newInstance(ReflectionMemberAccessor.java:17)
	at org.mockito.internal.creation.instance.ConstructorInstantiator.invokeConstructor(ConstructorInstantiator.java:69)
	at org.mockito.internal.creation.instance.ConstructorInstantiator.withParams(ConstructorInstantiator.java:52)
	at org.mockito.internal.creation.instance.ConstructorInstantiator.newInstance(ConstructorInstantiator.java:38)
	at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMock(SubclassByteBuddyMockMaker.java:48)
	at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:29)
	at org.powermock.api.mockito.mockmaker.PowerMockMaker.createMock(PowerMockMaker.java:41)
	at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:53)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:62)
	at org.mockito.Mockito.mock(Mockito.java:1951)
	at org.apache.pulsar.broker.service.PersistentTopicTest.setup(PersistentTopicTest.java:211)
	at org.apache.pulsar.broker.service.persistent.PersistentTopicStreamingDispatcherTest.setup(PersistentTopicStreamingDispatcherTest.java:34)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	... 34 more
Caused by: java.lang.NullPointerException
	at org.apache.pulsar.broker.service.ServerCnx.<init>(ServerCnx.java:233)
	at org.apache.pulsar.broker.service.ServerCnx.<init>(ServerCnx.java:229)
	at org.apache.pulsar.broker.service.ServerCnx$MockitoMock$1579413196.<init>(Unknown Source)
	... 55 more

This problem persisted after making #13608 change.

@lhotari I still can get this flaky test. https://github.com/apache/pulsar/runs/4976572806?check_suite_focus=true

lhotari · 2022-01-28T09:15:26Z

@gaozhangmin thanks, I'll reopen #13620

michaeljmarshall · 2022-02-11T23:27:23Z

@lhotari - since we're still observing test failures, is it worth cherry-picking this to 2.8? There are many conflicts when I just attempted to cherry-pick this commit.

…lue issue in broker tests (#13621) - replace spying of a instance with a spy created by Mockito with given constructor arguments (cherry picked from commit 17a971a)

gaoran10 · 2022-03-02T03:22:12Z

Same as @michaeljmarshall mentioned, I move this PR to 2.9.3 first.

lhotari added type/flaky-tests doc-not-needed Your PR changes do not impact docs labels Jan 5, 2022

lhotari requested review from merlimat, eolivelli, 315157973, codelipenghui and michaeljmarshall January 5, 2022 09:43

lhotari self-assigned this Jan 5, 2022

[Tests] Fix flaky org.mockito.exceptions.misusing.WrongTypeOfReturnVa…

e9b4816

…lue issue in broker tests - replace spying of a instance with a spy created by Mockito with given constructor arguments

lhotari force-pushed the lh-fix-spy-creation branch from 52048fe to e9b4816 Compare January 5, 2022 12:05

lhotari requested review from hezhangjian and Technoboy- January 5, 2022 12:14

lhotari added this to the 2.10.0 milestone Jan 5, 2022

lhotari added release/2.8.3 release/2.9.2 labels Jan 5, 2022

michaeljmarshall approved these changes Jan 5, 2022

View reviewed changes

lhotari merged commit 17a971a into apache:master Jan 5, 2022

codelipenghui added release/2.9.3 and removed release/2.9.2 labels Jan 18, 2022

michaeljmarshall added release/2.8.4 and removed release/2.8.3 labels Feb 15, 2022

gaoran10 added area/test release/2.9.2 labels Feb 16, 2022

gaoran10 removed the release/2.9.3 label Feb 16, 2022

codelipenghui added release/2.9.3 and removed release/2.9.2 labels Feb 16, 2022

michaeljmarshall added cherry-picked/branch-2.8 Archived: 2.8 is end of life release/2.8.3 and removed release/2.8.4 labels Feb 24, 2022

gaoran10 added release/2.9.2 release/2.9.3 and removed release/2.9.3 release/2.9.2 labels Mar 1, 2022

mattisonchao mentioned this pull request May 24, 2022

[branch-2.9] [Tests] Fix flaky WrongTypeOfReturnValue Mockito misuse issue in broker tests. #15738

Merged

mattisonchao added the cherry-picked/branch-2.9 Archived: 2.9 is end of life label May 25, 2022

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[Tests] Fix flaky WrongTypeOfReturnValue Mockito misuse issue in broker tests #13621

[Tests] Fix flaky WrongTypeOfReturnValue Mockito misuse issue in broker tests #13621

lhotari commented Jan 5, 2022

lhotari commented Jan 5, 2022 •

edited

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gaozhangmin commented Jan 28, 2022

lhotari commented Jan 28, 2022

michaeljmarshall commented Feb 11, 2022

gaoran10 commented Mar 2, 2022

[Tests] Fix flaky WrongTypeOfReturnValue Mockito misuse issue in broker tests #13621

[Tests] Fix flaky WrongTypeOfReturnValue Mockito misuse issue in broker tests #13621

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lhotari commented Jan 5, 2022

Motivation

Additional context

Modifications

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