??????????

????????flink????Kafka??????????????????????????

??????????

[ERROR] 
org.apache.flink.connector.kafka.source.reader.KafkaPartitionSplitReaderTest 
 Time elapsed: 1.398 s&nbsp; <<< ERROR!
java.lang.NoClassDefFoundError: org/apache/flink/networking/NetworkFailuresProxy
&nbsp;&nbsp; &nbsp;at 
org.apache.flink.streaming.connectors.kafka.KafkaTestEnvironment.createProxy(KafkaTestEnvironment.java:241)
&nbsp;&nbsp; &nbsp;at 
org.apache.flink.streaming.connectors.kafka.KafkaTestEnvironmentImpl.getKafkaServer(KafkaTestEnvironmentImpl.java:434)
&nbsp;&nbsp; &nbsp;at 
org.apache.flink.streaming.connectors.kafka.KafkaTestEnvironmentImpl.prepare(KafkaTestEnvironmentImpl.java:136)
&nbsp;&nbsp; &nbsp;at 
org.apache.flink.streaming.connectors.kafka.KafkaTestBase.startClusters(KafkaTestBase.java:165)
&nbsp;&nbsp; &nbsp;at 
org.apache.flink.streaming.connectors.kafka.KafkaTestBase.startClusters(KafkaTestBase.java:152)
&nbsp;&nbsp; &nbsp;at 
org.apache.flink.streaming.connectors.kafka.KafkaTestBase.prepare(KafkaTestBase.java:115)
&nbsp;&nbsp; &nbsp;at 
org.apache.flink.streaming.connectors.kafka.KafkaTestBase.prepare(KafkaTestBase.java:107)
&nbsp;&nbsp; &nbsp;at 
org.apache.flink.connector.kafka.source.testutils.KafkaSourceTestEnv.setup(KafkaSourceTestEnv.java:59)
&nbsp;&nbsp; &nbsp;at 
org.apache.flink.connector.kafka.source.reader.KafkaPartitionSplitReaderTest.setup(KafkaPartitionSplitReaderTest.java:87)
&nbsp;&nbsp; &nbsp;at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
&nbsp;&nbsp; &nbsp;at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
&nbsp;&nbsp; &nbsp;at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
&nbsp;&nbsp; &nbsp;at java.base/java.lang.reflect.Method.invoke(Method.java:566)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.extension.TimeoutExtension.interceptLifecycleMethod(TimeoutExtension.java:126)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.extension.TimeoutExtension.interceptBeforeAllMethod(TimeoutExtension.java:68)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeBeforeAllMethods$11(ClassBasedTestDescriptor.java:397)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeBeforeAllMethods(ClassBasedTestDescriptor.java:395)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.before(ClassBasedTestDescriptor.java:209)
&nbsp;&nbsp; &nbsp;at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.before(ClassBasedTestDescriptor.java:80)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:148)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
&nbsp;&nbsp; &nbsp;at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86)
&nbsp;&nbsp; &nbsp;at 
org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53)
&nbsp;&nbsp; &nbsp;at 
org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.execute(JUnitPlatformProvider.java:188)
&nbsp;&nbsp; &nbsp;at 
org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:154)
&nbsp;&nbsp; &nbsp;at 
org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:128)
&nbsp;&nbsp; &nbsp;at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:428)
&nbsp;&nbsp; &nbsp;at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:162)
&nbsp;&nbsp; &nbsp;at 
org.apache.maven.surefire.booter.ForkedBooter.run(ForkedBooter.java:562)
&nbsp;&nbsp; &nbsp;at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:548)
&nbsp;&nbsp; &nbsp;Suppressed: java.lang.NullPointerException
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.apache.flink.connector.kafka.source.testutils.KafkaSourceTestEnv.tearDown(KafkaSourceTestEnv.java:65)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.apache.flink.connector.kafka.source.reader.KafkaPartitionSplitReaderTest.tearDown(KafkaPartitionSplitReaderTest.java:99)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
java.base/java.lang.reflect.Method.invoke(Method.java:566)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.extension.TimeoutExtension.interceptLifecycleMethod(TimeoutExtension.java:126)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.extension.TimeoutExtension.interceptAfterAllMethod(TimeoutExtension.java:116)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeAfterAllMethods$13(ClassBasedTestDescriptor.java:425)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeAfterAllMethods$14(ClassBasedTestDescriptor.java:423)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
java.base/java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1083)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeAfterAllMethods(ClassBasedTestDescriptor.java:423)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.after(ClassBasedTestDescriptor.java:225)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.after(ClassBasedTestDescriptor.java:80)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:161)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:161)
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; ... 34 more
Caused by: java.lang.ClassNotFoundException: 
org.apache.flink.networking.NetworkFailuresProxy
&nbsp;&nbsp; &nbsp;at 
java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
&nbsp;&nbsp; &nbsp;at 
java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
&nbsp;&nbsp; &nbsp;at 
java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
&nbsp;&nbsp; &nbsp;... 69 more

????????????????????java.lang.NoClassDefFoundError: 
org/apache/flink/networking/NetworkFailuresProxy
??IDEA????????????????????????????


??????????????????????????????


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