Workflows are not sending emails due to issue Caused by: java.lang.NoClassDefFoundError: javax/activation/DataHandler

Hi @gspatil11-1 

DataHandler comes from JAF; it's not part of JavaMail. JAF is included in JDK 1.8 and older.  you should try    com.sun.activation:javax.activation:1.2.0.

--------------------

<dependency>
<groupId>com.sun.activation</groupId>
<artifactId>javax.activation</artifactId>
<version>1.2.0</version>
</dependency>

Hi @nitin_laad,

We tried putting dependency in core-pom.xml. Here dxp-shell-aem-core is one of our application deployed on AEM Author.

But still having same issue:

16.02.2022 03:55:06.718 *ERROR* [JobHandler: /var/workflow/instances/server0/2022-02-15_2/dxp-page-instant-activation_2:/content/mastercardcom/us/en/test-header/test-workflow-new11] com.adobe.granite.workflow.core.job.JobHandler Error executing workflow step

com.adobe.granite.workflow.WorkflowException: Process execution resulted in an error

        at com.adobe.granite.workflow.core.job.HandlerBase.executeProcess(HandlerBase.java:201)

        at com.adobe.granite.workflow.core.job.JobHandler.process(JobHandler.java:260)

        at org.apache.sling.event.impl.jobs.JobConsumerManager$JobConsumerWrapper.process(JobConsumerManager.java:502)

        at org.apache.sling.event.impl.jobs.queues.JobQueueImpl.startJob(JobQueueImpl.java:293)

        at org.apache.sling.event.impl.jobs.queues.JobQueueImpl.access$100(JobQueueImpl.java:60)

        at org.apache.sling.event.impl.jobs.queues.JobQueueImpl$1.run(JobQueueImpl.java:229)

        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)

        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)

        at java.base/java.lang.Thread.run(Thread.java:834)

Caused by: java.lang.NoClassDefFoundError: javax/activation/DataHandler

        at org.apache.commons.mail.Email.createMimeMessage(Email.java:1901)

        at org.apache.commons.mail.Email.buildMimeMessage(Email.java:1326)

        at org.apache.commons.mail.Email.send(Email.java:1495)

        at com.day.cq.mailer.impl.DefaultMailService.send(DefaultMailService.java:300)

        at com.day.cq.mailer.impl.DefaultMailService.send(DefaultMailService.java:45)

        at com.mastercard.dxp.aem.authoring.workflow.SendEmailProcess.send(SendEmailProcess.java:295)

        at com.mastercard.dxp.aem.authoring.workflow.SendEmailProcess.sendEmail(SendEmailProcess.java:134)

        at com.mastercard.dxp.aem.authoring.workflow.SendEmailToAuthorProcess.execute(SendEmailToAuthorProcess.java:121)

        at com.adobe.granite.workflow.core.job.HandlerBase.executeProcess(HandlerBase.java:195)

        ... 8 common frames omitted

Caused by: java.lang.ClassNotFoundException: javax.activation.DataHandler

        at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)

        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)

        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)

        ... 17 common frames omitted

Do we need to add the dependency in AEM 6.5 war file's pom.xml given below instead of pom.xml file of applications running on AEM?

pom.xml file location of AEM 6.5 war file : /apps_01/webapps/tomcat/conf/CMS_Authoring_Stage_Server/webapps/aem-stage/META-INF/maven/org.apache.sling/org.apache.sling.launchpad.base/pom.xml

<dependency>

  <groupId>com.sun.activation</groupId>

  <artifactId>javax.activation</artifactId>

  <version>1.2.0</version>

</dependency>

We have also observed below property with java version 8 on same pom.xml.

<properties>
<sling.java.version>8</sling.java.version>
</properties>

Regards,

G Patil

Hi @nitinjl,

One more point to add, we have attached screenshot of dependency for javax.activation.DataHandler in AEM system/console/depfinder. Please verify and let us know if org.apache.sling.javax.activation dependency to be added in pom.xml instead of com.sun.activation dependency as suggested earlier.
Below is the screenshot.