OpenSAML support for Java 21

Rohit Soni rohitsoni77 at gmail.com
Tue Aug 5 19:46:12 UTC 2025


Hi,

Can you please confirm if OpenSAML 4.0.1 is supported with Java 21
(OpenJDK) , we are trying to upgrade from JDK 17 to JDK 21 and seeing issue
with java.lang.NoClassDefFoundError: javax/servlet/ServletOutputStream when
invoking the org.opensaml.saml.saml2.binding.encoding.impl.HTTPPostEncoder
constructor.

Thanks
Rohit
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