ClassNotFoundException: javax.xml.bind.ValidationEventHandler happening even though jakarta.xml.bind-api 4.x.x installed

[xldai]

CacheManager accountCacheManager = CacheManagerBuilder.newCacheManager(new XmlConfiguration(xmlUrl));

Then got ClassNotFoundException: javax.xml.bind.ValidationEventHandler when running:

Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/ValidationEventHandler
	at org.ehcache.xml.XmlConfiguration.<init>(XmlConfiguration.java:116)
	at org.ehcache.xml.XmlConfiguration.<init>(XmlConfiguration.java:92)
	at org.ehcache.xml.XmlConfiguration.<init>(XmlConfiguration.java:78)

Here: https://repo1.maven.org/maven2/org/ehcache/modules/ehcache-xml/3.10.8/ehcache-xml-3.10.8.pom

    <dependency>
      <groupId>javax.xml.bind</groupId>
      <artifactId>jaxb-api</artifactId>
      <version>[2.2,3)</version>
      <scope>compile</scope>
    </dependency>
	
    <dependency>
      <groupId>jakarta.xml.bind</groupId>
      <artifactId>jakarta.xml.bind-api</artifactId>
      <version>[3,4)</version>
      <scope>compile</scope>
      <optional>true</optional>
    </dependency>

Both javax.xml.bind and jakarta.xml.bind-api are declared as dependencies of it.

Any chance the ehcache is working with ONLY jakarta jaxb ?

[wjbqmz]

Is your project environment JDK8 or above? You can modify your pom.xml file to import dependencies like this:

<dependency>
  <groupId>org.ehcache</groupId>
  <artifactId>ehcache</artifactId>
  <version>3.11.1</version>
  <classifier>jakarta</classifier>

  <exclusions>
    <exclusion>
      <groupId>org.glassfish.jaxb</groupId>
      <artifactId>jaxb-runtime</artifactId>
    </exclusion>
  </exclusions>
</dependency>
<dependency>
  <groupId>org.glassfish.jaxb</groupId>
  <artifactId>jaxb-runtime</artifactId>
  <version>[3,3.1)</version>
</dependency>

From Ehcache official website: https://www.ehcache.org/documentation/3.11/getting-started.html

[Shaquarib]

javax.xml.bind.ValidationEventHandler when running:

Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/ValidationEventHandler
at org.ehcache.xml.XmlConfiguration.(XmlConfiguration.java:116)
at org.ehcache.xml.XmlConfiguration.(XmlConfiguration.java:92)
at org.ehcache.xml.XmlConfiguration.(XmlConfiguration.java:78)
Here: https://repo1.maven.org/maven2/org/ehcache/modules/ehcache-xml/3.10.8/ehcache-xml-3.10.8.pom

<dependency>
  <groupId>javax.xml.bind</groupId>
  <artifactId>jaxb-api</artifactId>
  <version>[2.2,3)</version>
  <scope>compile</scope>
</dependency>

<dependency>
  <groupId>jakarta.xml.bind</groupId>
  <artifactId>jakarta.xml.bind-api</artifactId>
  <version>[3,4)</version>
  <scope>compile</scope>
  <optional>true</optional>
</dependency>

Both javax.xml.bind and jakarta.xml.bind-api are declared as dependencies of it.

Any chance the ehcache is working with ONLY jakarta jaxb ?

ChatGPT said:
Yes — Ehcache 3.10.8 can work with only Jakarta JAXB, but you have to use the Jakarta variant of the Ehcache artifact. Simply putting jakarta.xml.bind-api on the classpath does not make the normal Ehcache JAR Jakarta-compatible.

The key detail is that there are actually two versions of the Ehcache bytecode in 3.10.8:

ehcache-3.10.8.jar → references javax.xml.bind.*
ehcache-3.10.8-jakarta.jar → references jakarta.xml.bind.*
Maven Central explicitly contains the Jakarta JAR alongside the normal one.