org.glassfish.jersey.message.internal.MessagingBinders$EnabledProvidersBinder.bindToBinder A class javax.activation.DataSource for a default provider MessageBodyWriter<javax.activation.DataSource> was not found. The provider is not available.

[minfrin]

When jersey v2.41 is started up, the following is logged:

28-Nov-2023 15:23:29.662 WARNING [main] org.glassfish.jersey.message.internal.MessagingBinders$EnabledProvidersBinder.bindToBinder A class javax.activation.DataSource for a default provider MessageBodyWriter<javax.activation.DataSource> was not found. The provider is not available.

The javax.activation.DataSource appears to be part of obsolete javax.activation API, but this dependency does not come through transitively.

[jansupol]

That is a warning for the customers.

The warning says that in case you are using javax.activation.DataSource and you did not put javax.activation or jakarta.activation (1.x) on classpath on JDK 11+, it won't work for you.

The warning can be turned off by PROVIDER_DEFAULT_DISABLE property.