Upgrading Hessian 2.1.12 in Liferay 4.4.2 https://liferay.dev/c/message_boards/find_thread?p_l_id=119785294&threadId=1710153 2026-04-24T21:11:33Z 2026-04-24T21:11:33Z Richard Gal https://liferay.dev/c/message_boards/find_message?p_l_id=119785294&messageId=1712074 2008-12-05T13:17:43Z 2008-12-05T13:17:43Z

Hi<br /><br />I also noticed that Liferay 4.4.2 has a dependency on Spring 2.5.0. However, Spring 2.5.0 transitively depends on Hessian 3.0.20. So why is there in Liferay 4.4.2 the dependency from Hessian 2.1.12?<br /><br />Richie.

Richard Gal 2008-12-05T13:17:43Z Richard Gal https://liferay.dev/c/message_boards/find_message?p_l_id=119785294&messageId=1710152 2008-12-05T08:21:26Z 2008-12-05T08:21:26Z

Hi<br /><br />Does anyone have any experience / information whether it is possible to upgrade the Hessian 2.1.12 library to a newer version in Liferay 4.4.2?<br /><br />According to <span style="font-family: Courier New">ext.lib.versions.html</span>, Liferay 4.4.2 is using Hessian 2.1.12. Having looked into the same file in Liferay 5.1.2, I found that still the same old version is used. However, Hessian 3.2.0 is the current version already and 2.1.12 is not even offered for download anymore.<br /><br />The reason why I am asking about this is that I have run into the issue filed under <a href="http://issues.liferay.com/browse/LEP-3978">LEP-3978</a>. Having searched the web for related topics, I found hints that <span style="font-family: Courier New">com.caucho.hessian.io.JavaDeserializer</span> might have issues in early versions of Hessian and I am wondering if it was possible to switch to a later version in Liferay (4.4.2) with limited effort.<br /><br />Can anyone help me with this?<br /><br />PS.: I have searched the blogs, the forum and the wiki about this question but I found no information about it.

Richard Gal 2008-12-05T08:21:26Z