asanguinetti opened a new issue, #2814:
URL: https://github.com/apache/logging-log4j2/issues/2814
## Description
When using the `JsonLayout` in a very simple configuration such as this:
```
<Console name="Console" target="SYSTEM_OUT">
<JsonLayout/>
</Console>
```
There is an `InaccessibleObjectException` when trying to instantiate a
`ContextDataSerializer` because its constructor is protected:
`ERROR An exception occurred processing Appender Console
java.lang.reflect.InaccessibleObjectException: Unable to make protected
org.apache.logging.log4j.core.jackson.ContextDataSerializer() accessible:
module org.apache.logging.log4j.core does not "opens
org.apache.logging.log4j.core.jackson" to module com.fasterxml.jackson.databind`
We are aware that `JsonLayout` has been marked as deprecated and there is
another alternative called `JsonTemplateLayout`. That one works. However, our
customers are still using `JsonLayout` in their configurations and they would
like to be able to keep doing so.
## Configuration
**Version:** Tested in 2.23.1 but probably happens on any 2.x
**Operating system:** Doesn't seem to matter, but tested with macOS 14.6
**JDK:** Tested with Temurin-17.0.11+9
## Logs
```
2024-08-08T18:40:40.439988Z main ERROR An exception occurred processing
Appender Console java.lang.reflect.InaccessibleObjectException: Unable to make
protected org.apache.logging.log4j.core.jackson.ContextDataSerializer()
accessible: module org.apache.logging.log4j.core does not "opens
org.apache.logging.log4j.core.jackson" to module com.fasterxml.jackson.databind
at
java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
at
java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
at
java.base/java.lang.reflect.Constructor.checkCanSetAccessible(Constructor.java:188)
at
java.base/java.lang.reflect.Constructor.setAccessible(Constructor.java:181)
at
[email protected]/com.fasterxml.jackson.databind.util.ClassUtil.checkAndFixAccess(ClassUtil.java:1005)
at
[email protected]/com.fasterxml.jackson.databind.util.ClassUtil.findConstructor(ClassUtil.java:577)
at
[email protected]/com.fasterxml.jackson.databind.util.ClassUtil.createInstance(ClassUtil.java:559)
at
[email protected]/com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializerInstance(DefaultSerializerProvider.java:144)
at
[email protected]/com.fasterxml.jackson.databind.ser.BasicSerializerFactory.findSerializerFromAnnotation(BasicSerializerFactory.java:547)
at
[email protected]/com.fasterxml.jackson.databind.ser.BeanSerializerFactory._constructWriter(BeanSerializerFactory.java:860)
at
[email protected]/com.fasterxml.jackson.databind.ser.BeanSerializerFactory.findBeanProperties(BeanSerializerFactory.java:634)
at
[email protected]/com.fasterxml.jackson.databind.ser.BeanSerializerFactory.constructBeanOrAddOnSerializer(BeanSerializerFactory.java:402)
at
[email protected]/com.fasterxml.jackson.databind.ser.BeanSerializerFactory.findBeanOrAddOnSerializer(BeanSerializerFactory.java:295)
at
[email protected]/com.fasterxml.jackson.databind.ser.BeanSerializerFactory._createSerializer2(BeanSerializerFactory.java:240)
at
[email protected]/com.fasterxml.jackson.databind.ser.BeanSerializerFactory.createSerializer(BeanSerializerFactory.java:174)
at
[email protected]/com.fasterxml.jackson.databind.SerializerProvider._createUntypedSerializer(SerializerProvider.java:1525)
at
[email protected]/com.fasterxml.jackson.databind.SerializerProvider._createAndCacheUntypedSerializer(SerializerProvider.java:1473)
at
[email protected]/com.fasterxml.jackson.databind.SerializerProvider.findValueSerializer(SerializerProvider.java:578)
at
[email protected]/com.fasterxml.jackson.databind.SerializerProvider.findTypedValueSerializer(SerializerProvider.java:856)
at
[email protected]/com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:330)
at
[email protected]/com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1574)
at
[email protected]/com.fasterxml.jackson.databind.ObjectWriter._writeValueAndClose(ObjectWriter.java:1275)
at
[email protected]/com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:1114)
at
[email protected]/org.apache.logging.log4j.core.layout.AbstractJacksonLayout.toSerializable(AbstractJacksonLayout.java:379)
at
[email protected]/org.apache.logging.log4j.core.layout.JsonLayout.toSerializable(JsonLayout.java:390)
at
[email protected]/org.apache.logging.log4j.core.layout.AbstractJacksonLayout.toSerializable(AbstractJacksonLayout.java:327)
at
[email protected]/org.apache.logging.log4j.core.layout.JsonLayout.toSerializable(JsonLayout.java:69)
at
[email protected]/org.apache.logging.log4j.core.layout.AbstractJacksonLayout.toSerializable(AbstractJacksonLayout.java:50)
at
[email protected]/org.apache.logging.log4j.core.layout.AbstractStringLayout.toByteArray(AbstractStringLayout.java:295)
at
[email protected]/org.apache.logging.log4j.core.layout.AbstractLayout.encode(AbstractLayout.java:207)
at
[email protected]/org.apache.logging.log4j.core.layout.AbstractLayout.encode(AbstractLayout.java:36)
at
[email protected]/org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.directEncodeEvent(AbstractOutputStreamAppender.java:227)
at
[email protected]/org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.tryAppend(AbstractOutputStreamAppender.java:220)
at
[email protected]/org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:211)
at
[email protected]/org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:160)
at
[email protected]/org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:133)
at
[email protected]/org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:124)
at
[email protected]/org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:88)
at
[email protected]/org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:705)
at
[email protected]/org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:663)
at
[email protected]/org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:639)
at
[email protected]/org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:575)
at
[email protected]/org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:92)
at
[email protected]/org.apache.logging.log4j.core.Logger.log(Logger.java:169)
at
[email protected]/org.apache.logging.log4j.spi.AbstractLogger.tryLogMessage(AbstractLogger.java:2906)
at
[email protected]/org.apache.logging.log4j.spi.AbstractLogger.logMessageTrackRecursion(AbstractLogger.java:2859)
at
[email protected]/org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2841)
at
[email protected]/org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:2620)
at
[email protected]/org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:2567)
at
[email protected]/org.apache.logging.log4j.spi.AbstractLogger.warn(AbstractLogger.java:3469)
at [email protected]/org.mule.tests.Main.main(Main.java:12)
```
## Reproduction
Attaching a minimalistic Maven project that reproduces the issue.
[log4j-jsonLayout-test.zip](https://github.com/user-attachments/files/16552658/log4j-jsonLayout-test.zip)
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