Jersey 2.x is JavaEE8/Jakarta EE 8/JAX-RS 2.1/Jakarta REST 2.1 compatible release. Jersey 2.40 changes:
ASM 9.5 (JDK 21 support)
Netty Connector supports RequestEntityProcessing.BUFFERED (i.e. not only chunk encoding)
Allow for choosing the client connector using ClientProperties.CONNECTOR_PROVIDER property. Works also when the property is set using microprofile-config.properties (with org.glassfish.jersey.ext.microprofile:jersey-mp-config & org.eclipse.microprofile.config implementation)
ParamConverters #toString() and fromString() do not throw IEA exception by default (unless configured to do so by CommonProprties.PARAM_CONVERTERS_THROW_IAE) to speedup request processing.