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After migrating to Spring Boot 3 from 2.6.9, I am encountering the following error.

Root cause:

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:140)
    at jakarta.activation.MimetypesFileTypeMap.<init>(MimetypesFileTypeMap.java:312)
    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)
    ... 74 common frames omitted

I have added following two dependencies as a solution suggested by other Stack Overflow answers, but that didn't work.

<dependency>
    <groupId>org.glassfish.jaxb</groupId>
    <artifactId>jaxb-runtime</artifactId>
    <version>${jaxb-runtime.version}</version>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>jakarta.activation</groupId>
    <artifactId>jakarta.activation-api</artifactId>
    <version>2.1.1</version>
    <scope>runtime</scope>
</dependency>

I also tried solution provided by Tomcat 10, Java 17 - JavaMailSender cannot cast one of elements of java.lang.Object[] and https://github.com/spring-projects/spring-boot/issues/33452, which didn't work either.

Mark Rotteveel
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Uday Patil
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1 Answers1

-1

Check one's by adding below dependency

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-mail</artifactId>
  <exclusions>
    <exclusion>
      <groupId>jakarta.activation</groupId>
      <artifactId>jakarta.activation-api</artifactId>
    </exclusion>
  </exclusions>
</dependency>
Mark Rotteveel
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Bala Maddilety
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