spring-boot: an error occurred by springboot 3 mail fails to start

After migration to Spring Boot 3.0 mail we did get an issue with [MailSenderPropertiesConfiguration] as the application fails to start getting this Caused by: java.lang.ArrayStoreException: arraycopy: element type mismatch: can not cast one of the elements of java.lang.Object[] to the type of the destination array, jakarta.activation.MimeTypeRegistry

In Spring Boot 2.7.6 works with configuration.

Stack trace:

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'emailHandlerService' defined in file [EmailHandlerService.class]: Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with name 'defaultEmailSenderSmtp' defined in file [DefaultEmailSenderSmtp.class]: Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with name 'mailSender' defined in class path resource [org/springframework/boot/autoconfigure/mail/MailSenderPropertiesConfiguration.class]: Failed to instantiate [org.springframework.mail.javamail.JavaMailSenderImpl]: Factory method 'mailSender' threw exception with message: arraycopy: element type mismatch: can not cast one of the elements of java.lang.Object[] to the type of the destination array, jakarta.activation.MimeTypeRegistry
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:793)
	at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:242)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1344)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1188)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:561)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:521)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1405)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1325)
	at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:880)
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:784)
	... 47 common frames omitted
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'defaultEmailSenderSmtp' defined in file [DefaultEmailSenderSmtp.class]: Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with name 'mailSender' defined in class path resource [org/springframework/boot/autoconfigure/mail/MailSenderPropertiesConfiguration.class]: Failed to instantiate [org.springframework.mail.javamail.JavaMailSenderImpl]: Factory method 'mailSender' threw exception with message: arraycopy: element type mismatch: can not cast one of the elements of java.lang.Object[] to the type of the destination array, jakarta.activation.MimeTypeRegistry
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:793)
	at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:242)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1344)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1188)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:561)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:521)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1405)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1325)
	at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:880)
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:784)
	... 61 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mailSender' defined in class path resource [org/springframework/boot/autoconfigure/mail/MailSenderPropertiesConfiguration.class]: Failed to instantiate [org.springframework.mail.javamail.JavaMailSenderImpl]: Factory method 'mailSender' threw exception with message: arraycopy: element type mismatch: can not cast one of the elements of java.lang.Object[] to the type of the destination array, jakarta.activation.MimeTypeRegistry
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:652)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:640)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1324)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1161)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:561)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:521)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1405)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1325)
	at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:880)
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:784)
	... 75 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.mail.javamail.JavaMailSenderImpl]: Factory method 'mailSender' threw exception with message: arraycopy: element type mismatch: can not cast one of the elements of java.lang.Object[] to the type of the destination array, jakarta.activation.MimeTypeRegistry
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:171)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:648)
	... 89 common frames omitted
Caused by: java.lang.ArrayStoreException: arraycopy: element type mismatch: can not cast one of the elements of java.lang.Object[] to the type of the destination array, jakarta.activation.MimeTypeRegistry
	at java.base/java.lang.System.arraycopy(Native Method)
	at java.base/java.util.Vector.copyInto(Vector.java:205)
	at jakarta.activation.MimetypesFileTypeMap.<init>(MimetypesFileTypeMap.java:141)
	at jakarta.activation.MimetypesFileTypeMap.<init>(MimetypesFileTypeMap.java:313)
	at org.springframework.mail.javamail.ConfigurableMimeFileTypeMap.createFileTypeMap(ConfigurableMimeFileTypeMap.java:150)
	at org.springframework.mail.javamail.ConfigurableMimeFileTypeMap.getFileTypeMap(ConfigurableMimeFileTypeMap.java:123)
	at org.springframework.mail.javamail.ConfigurableMimeFileTypeMap.afterPropertiesSet(ConfigurableMimeFileTypeMap.java:110)
	at org.springframework.mail.javamail.JavaMailSenderImpl.<init>(JavaMailSenderImpl.java:115)
	at org.springframework.boot.autoconfigure.mail.MailSenderPropertiesConfiguration.mailSender(MailSenderPropertiesConfiguration.java:44)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:139)
	... 90 common frames omitted

About this issue

Original URL
State: closed
Created 2 years ago
Comments: 27 (5 by maintainers)

Most upvoted comments

Adding these two helped me, ref: https://stackoverflow.com/questions/73034101/resolved-spring-boot-starter-mail-failed-to-access-class-com-sun-activation

<dependency>
    <groupId>com.sun.xml.bind</groupId>
    <artifactId>jaxb-core</artifactId>
    <version>4.0.0</version>
    <exclusions>
        <exclusion>
        <groupId>org.eclipse.angus</groupId>
        <artifactId>angus-activation</artifactId>
        </exclusion>
    </exclusions>
</dependency>

<dependency>
    <groupId>com.sun.activation</groupId>
    <artifactId>jakarta.activation</artifactId>
    <version>2.0.1</version>
</dependency>

Nemanja3214 on Jan 3, 2023

I’m facing the same issue, but I don’t have any direct dependency on jakarta activation. What’s the actual cause of the issue?

MartinHaeusler on Dec 13, 2022

@mohammedamineboutouil: I just ran into the same issue. Which dependency ended up causing your conflict?

theigl on Dec 8, 2022

Thanks, removing com.sun.activation related dependencies did the job for me.

1udaypatil1 on Apr 11, 2023

@Alex-Cosma Thanks for the sample. In your case, it’s the org.keycloak dependencies that transitively depend on com.sun.activation:jakarta.activation:1.2.2. Changing those lines in your build file from this:

    implementation "org.keycloak:keycloak-spring-boot-starter:20.0.1"
    implementation "org.keycloak:keycloak-admin-client:20.0.1"

to this:

    implementation("org.keycloak:keycloak-spring-boot-starter:20.0.1") {
        exclude group: "com.sun.activation", module: "jakarta.activation"
    }
    implementation("org.keycloak:keycloak-admin-client:20.0.1") {
        exclude group: "com.sun.activation", module: "jakarta.activation"
    }

fixes the problem in your sample.

With Gradle, you can also solve this problem with configuration like this:

configurations.all {
    resolutionStrategy {
        exclude group: "com.sun.activation", module: "jakarta.activation"
    }
}

For anyone else who is having this problem, please analyze the full dependency graph of your project, look for anything that transitivley depends on this com.sun.activation:jakarta.activation library, and remove the library from the application classpath.

scottfrederick on Dec 16, 2022

I didn’t have a direct dependency either. Use maven dependency:tree to see if any of your libraries pulls in the package. If so, declare the dependency yourself as a runtime dependency.

This is what we used to resolve this issue. We were not using Spring Boot but were using Spring MVC, Security, Integration, etc. and were hitting this. The issue (for us) eventually turned out to be Hibernate 6.X pulling in org.glassfish.jaxb:jaxb-runtime which was pulling in a version of activation which was slightly older (2.0.1 possibly) than what was being used elsewhere (2.1.0 I believe).

korymcandrew on Dec 13, 2022