@JsonDeserialize(contentUsing = StackTraceElementDeserializer.class) ignored?

[dsin...@volumeintegration.com]

Hello,

I'm encountering an error when when deserializing a class that includes an array of StackTraceElement even with the @JsonDeserialize(contentUsing = StackTraceElementDeserializer.class) annotation on the field. Any suggestions?

Thanks,

-David

using these dependencies:

compile "com.fasterxml.jackson.core:jackson-databind:2.8.2"
compile "com.fasterxml.jackson.dataformat:jackson-dataformat-smile:2.8.2"
compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.8.2"

Example unit test shown below:

package com.volumeintegration.va.messaging;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.deser.std.StackTraceElementDeserializer;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import org.junit.Ignore;
import org.junit.Test;

import static com.fasterxml.jackson.annotation.JsonInclude.Include.NON_NULL;

public class StackTraceElementTest {

    @Ignore
    @Test
    public void test() throws Exception {
        // JMV 1
        ErrorObject error = new ErrorObject(new Exception("exception message"));

        ObjectMapper objectMapper1 = new ObjectMapper();
        objectMapper1.findAndRegisterModules();
        objectMapper1.registerModule(new JavaTimeModule());
        objectMapper1.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        objectMapper1.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);

        byte[] bytes = objectMapper1.writeValueAsBytes(error);

        // JVM 2
        ObjectMapper objectMapper2 = new ObjectMapper();
        objectMapper2.findAndRegisterModules();
        objectMapper2.registerModule(new JavaTimeModule());
        objectMapper2.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        objectMapper2.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);

        JsonNode jsonNode = objectMapper2.readValue(bytes, JsonNode.class);
        System.out.println(jsonNode);
        /*
        {
          "throwable":"java.lang.Exception",
          "message":"exception message",
          "stackTrace":[
            {
              "declaringClass":"com.volumeintegration.va.messaging.StackTraceElementTest",
              "methodName":"test",
              "fileName":"StackTraceElementTest.java",
              "lineNumber":23,
              "className":"com.volumeintegration.va.messaging.StackTraceElementTest",
              "nativeMethod":false
            },
            {
              "declaringClass":"sun.reflect.NativeMethodAccessorImpl",
              "methodName":"invoke0",
              "fileName":"NativeMethodAccessorImpl.java",
              "lineNumber":-2,
              "className":"sun.reflect.NativeMethodAccessorImpl",
              "nativeMethod":true
             },
             ...
         */

        ObjectMapper objectMapper3 = new ObjectMapper();
        objectMapper3.findAndRegisterModules();
        objectMapper3.registerModule(new JavaTimeModule());
        objectMapper3.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);

        ErrorObject deserialized = objectMapper3.treeToValue(jsonNode, ErrorObject.class);
        System.out.println(deserialized);
        /*
        com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "declaringClass" (class java.lang.StackTraceElement), not marked as ignorable
        at [Source: N/A; line: -1, column: -1] (through reference chain: com.volumeintegration.va.messaging.ErrorObject["stackTrace"]->Object[][0]->java.lang.StackTraceElement["declaringClass"])
       at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:62)
       at com.fasterxml.jackson.databind.DeserializationContext.handleUnknownProperty(DeserializationContext.java:833)
       at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:1096)
       at com.fasterxml.jackson.databind.deser.std.StackTraceElementDeserializer.deserialize(StackTraceElementDeserializer.java:52)
       at com.fasterxml.jackson.databind.deser.std.StackTraceElementDeserializer.deserialize(StackTraceElementDeserializer.java:11)
       at com.fasterxml.jackson.databind.deser.std.ObjectArrayDeserializer.deserialize(ObjectArrayDeserializer.java:196)
       at com.fasterxml.jackson.databind.deser.std.ObjectArrayDeserializer.deserialize(ObjectArrayDeserializer.java:20)
       at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:490)
       at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:95)
       at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:276)
       at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:140)
       at com.fasterxml.jackson.databind.ObjectMapper._readValue(ObjectMapper.java:3761)
       at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2090)
       at com.fasterxml.jackson.databind.ObjectMapper.treeToValue(ObjectMapper.java:2587)
       at com.volumeintegration.va.messaging.StackTraceElementTest.test(StackTraceElementTest.java:45)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
       at java.lang.reflect.Method.invoke(Method.java:498)
       at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
       at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
       at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
       at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
       at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
       at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
       at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
       at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
       at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
       at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
       at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
       at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
       at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
       at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
       at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
       at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
       at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
       at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
        */
    }

    @JsonInclude(NON_NULL)
    public static class ErrorObject {

        private String throwable;
        private String message;
        @JsonDeserialize(contentUsing = StackTraceElementDeserializer.class) private StackTraceElement[] stackTrace;

        public ErrorObject() {}

        public ErrorObject(Throwable throwable) {
            this.throwable = throwable.getClass().getName();
            message = throwable.getMessage();
            stackTrace = throwable.getStackTrace();
        }

        public String getThrowable() {
            return throwable;
        }

        public void setThrowable(String throwable) {
            this.throwable = throwable;
        }

        public String getMessage() {
            return message;
        }

        public void setMessage(String message) {
            this.message = message;
        }

        public StackTraceElement[] getStackTrace() {
            return stackTrace;
        }

        public void setStackTrace(StackTraceElement[] stackTrace) {
            this.stackTrace = stackTrace;
        }
    }
}

[Tatu Saloranta]

It probably won't matter too much, but as a general practice the very
first thing you should do is to use latest patch version of the minor
version:
so instead of using 2.8.2, try 2.8.10. There are literally dozens of
fixes within 8 patch releases and it is good to eliminate possibility
of problem
having been fixed.

But assuming this is reproducible with 2.8.10, I would suggest you
file an issue: looks like deserializer you indicate via annotations is
not being used.
Usage looks correct to me and it should be used, so this looks like a
bug, and code should work as nice reproduction.

-+ Tatu +-

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[dsin...@volumeintegration.com]

Thanks Tatu.

I was able to reproduce the exception with versions 2.8.10 and 2.9.2 so I created https://github.com/FasterXML/jackson-databind/issues/1794

-David

[Tatu Saloranta]

Thanks!

-+ Tatu +-