How to resolve the error of the java.lang.LinkageError in the email service https://liferay.dev/c/message_boards/find_thread?p_l_id=119785294&threadId=120540985 2026-04-03T23:44:06Z 2026-04-03T23:44:06Z Bhargav Vaghasiya https://liferay.dev/c/message_boards/find_message?p_l_id=119785294&messageId=120540984 2021-01-07T17:18:38Z 2021-01-07T11:07:44Z

<p>Hello</p> <p>I am working on one project which is build with <strong>liferay 7.0.</strong></p> <p>Currently we have three servers DEV, Staging, and Production</p> <p>We have done <strong>same email SMTP configurations</strong> in all three servers. but it is not working in two servers, only working in one server.</p> <p>It is working in Staging. <strong>Note that we have created production server from copy of the Liferay from Staging.</strong></p> <p>WE are getting following errors in the production while <strong>user creates an account </strong>on our production server</p> <p>------------------------------------------------------------------------------------------</p> <p>Exception in thread &quot;liferay/mail-2&quot; java.lang.LinkageError: loader constraint violation: loader (<strong>instance of &lt;bootloader&gt;</strong>) previously initiated loading for a different type with name &quot;<strong>javax/activation/DataHandler</strong>&quot;<br />    at javax.mail.internet.MimeMessage.setContent(MimeMessage.java:1428)<br />    at com.liferay.util.mail.MailEngine.send(MailEngine.java:347)<br />    at com.liferay.util.mail.MailEngine.send(MailEngine.java:457)<br />    at com.liferay.mail.messaging.MailMessageListener.doMailMessage(MailMessageListener.java:94)<br />    at com.liferay.mail.messaging.MailMessageListener.doReceive(MailMessageListener.java:109)<br />    at com.liferay.portal.kernel.messaging.BaseMessageListener.receive(BaseMessageListener.java:26)<br />    at com.liferay.portal.kernel.messaging.InvokerMessageListener.receive(InvokerMessageListener.java:74)<br />    at com.liferay.portal.kernel.messaging.ParallelDestination$1.run(ParallelDestination.java:52)<br />    at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask._runTask(ThreadPoolExecutor.java:756)<br />    at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask.run(ThreadPoolExecutor.java:667)<br />    at java.lang.Thread.run(Thread.java:748)</p> <p>------------------------------------------------------------------------------------------</p> <p>I have also tried after clearing server cache.</p> <p>I have searched a lot for this issue but i am not finding any propersolution</p> <p> <strong>1. What are the possible cause for this issue.</strong></p> <p> <strong>2. Is it possible there are some configuration done (By old developer) from the JAR?</strong></p> <p> <strong>3. How can i overcome this situation</strong></p>

Bhargav Vaghasiya 2021-01-07T11:07:44Z