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Type:
Bug Report
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Resolution: Unresolved
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Priority:
L3 - Default
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None
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Affects Version/s: 7.8.4
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Component/s: engine
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None
Scenario:
- Configure the Spin JSON data format, such that the object mapper uses the following setting: dataFormat.getObjectMapper().enableDefaultTyping(ObjectMapper.DefaultTyping.NON_CONCRETE_AND_ARRAYS, JsonTypeInfo.As.WRAPPER_OBJECT);
- Persist a process variable that is an ArrayList instance with some elements
- The generated JSON looks like this:
[{"org.camunda.bpm.unittest.ListElement":{"exampleAttribute":null}},{"org.camunda.bpm.unittest.ListElement":{"exampleAttribute":null}}](note: this is because the element type is erased at runtime, so the elements are treated as non-conrete Object instances)
- Access the deserialized variable value
Expected behavior:
- The list is retrieved
Actual behavior:
- Deserializing the JSON fails with this exception:
SCHWERWIEGEND: ENGINE-16004 Exception while closing command context: Cannot deserialize object in variable 'var': SPIN/JACKSON-JSON-01006 Cannot deserialize '[{"org.cam...' to java type '[collection type; class java.util.ArrayList, contains [simple type, class org.camunda.bpm.unittest.ListElement]]' org.camunda.bpm.engine.ProcessEngineException: Cannot deserialize object in variable 'var': SPIN/JACKSON-JSON-01006 Cannot deserialize '[{"org.cam...' to java type '[collection type; class java.util.ArrayList, contains [simple type, class org.camunda.bpm.unittest.ListElement]]' at org.camunda.bpm.engine.impl.variable.serializer.AbstractSerializableValueSerializer.readValue(AbstractSerializableValueSerializer.java:81) at org.camunda.bpm.engine.impl.variable.serializer.AbstractSerializableValueSerializer.readValue(AbstractSerializableValueSerializer.java:27) at org.camunda.bpm.engine.impl.persistence.entity.util.TypedValueField.getTypedValue(TypedValueField.java:93) at org.camunda.bpm.engine.impl.persistence.entity.VariableInstanceEntity.getTypedValue(VariableInstanceEntity.java:267) at org.camunda.bpm.engine.impl.core.variable.scope.AbstractVariableScope.getValueFromVariableInstance(AbstractVariableScope.java:134) at org.camunda.bpm.engine.impl.core.variable.scope.AbstractVariableScope.getVariable(AbstractVariableScope.java:121) at org.camunda.bpm.engine.impl.cmd.GetExecutionVariableCmd.execute(GetExecutionVariableCmd.java:58) at org.camunda.bpm.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24) at org.camunda.bpm.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:104) at org.camunda.bpm.engine.impl.interceptor.ProcessApplicationContextInterceptor.execute(ProcessApplicationContextInterceptor.java:66) at org.camunda.bpm.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:30) at org.camunda.bpm.engine.impl.RuntimeServiceImpl.getVariable(RuntimeServiceImpl.java:310) at org.camunda.bpm.unittest.SimpleTestCase.shouldExecuteProcess(SimpleTestCase.java:69) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55) at org.camunda.bpm.engine.test.ProcessEngineRule$1.evaluate(ProcessEngineRule.java:165) at org.junit.rules.RunRules.evaluate(RunRules.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) Caused by: org.camunda.spin.json.SpinJsonException: SPIN/JACKSON-JSON-01006 Cannot deserialize '[{"org.cam...' to java type '[collection type; class java.util.ArrayList, contains [simple type, class org.camunda.bpm.unittest.ListElement]]' at org.camunda.spin.impl.json.jackson.JacksonJsonLogger.unableToDeserialize(JacksonJsonLogger.java:65) at org.camunda.spin.impl.json.jackson.format.JacksonJsonDataFormatMapper.mapInternalToJava(JacksonJsonDataFormatMapper.java:76) at org.camunda.spin.impl.json.jackson.format.JacksonJsonDataFormatMapper.mapInternalToJava(JacksonJsonDataFormatMapper.java:66) at org.camunda.spin.plugin.impl.SpinObjectValueSerializer.deserializeFromByteArray(SpinObjectValueSerializer.java:93) at org.camunda.bpm.engine.impl.variable.serializer.AbstractObjectValueSerializer.deserializeFromByteArray(AbstractObjectValueSerializer.java:109) at org.camunda.bpm.engine.impl.variable.serializer.AbstractSerializableValueSerializer.readValue(AbstractSerializableValueSerializer.java:79) ... 38 more Caused by: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "org.camunda.bpm.unittest.ListElement" (class org.camunda.bpm.unittest.ListElement), not marked as ignorable (one known property: "exampleAttribute"]) at [Source: N/A; line: -1, column: -1] (through reference chain: java.util.ArrayList[0]->org.camunda.bpm.unittest.ListElement["org.camunda.bpm.unittest.ListElement"]) at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:51) at com.fasterxml.jackson.databind.DeserializationContext.reportUnknownProperty(DeserializationContext.java:839) at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:1045) at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty(BeanDeserializerBase.java:1352) at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownVanilla(BeanDeserializerBase.java:1330) at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:264) at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:125) at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:245) at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:217) at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:25) at com.fasterxml.jackson.databind.ObjectMapper._readValue(ObjectMapper.java:3708) at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2071) at org.camunda.spin.impl.json.jackson.format.JacksonJsonDataFormatMapper.mapInternalToJava(JacksonJsonDataFormatMapper.java:74) ... 42 more
Test case: