Unresolved requirement: Require-Capability: osgi.extender; filter:="(osgi.extender=osgi.serviceloader.registrar)"

[cheninator]

I'm trying to use Jetty 9.4.8 for an Eclipse Application. I want to use HTTP/2 server features but when starting the .product, this error shows. How can I fix it without using Apache Aries SPI Fly?

` Unresolved requirement: Require-Bundle: org.eclipse.jetty.http2.server
-> Bundle-SymbolicName: org.eclipse.jetty.http2.server; bundle-version="9.4.8.v20171121"
org.eclipse.jetty.http2.server [19]
Unresolved requirement: Import-Package: org.eclipse.jetty.http2.api; version="[9.4.8,9.4.9)"
-> Export-Package: org.eclipse.jetty.http2.api; bundle-symbolic-name="org.eclipse.jetty.http2.common"; bundle-version="9.4.8.v20171121"; version="9.4.8"; uses:="org.eclipse.jetty.http2.frames,org.eclipse.jetty.util"
org.eclipse.jetty.http2.common [67]
Unresolved requirement: Import-Package: org.eclipse.jetty.http2.hpack; version="[9.4.8,9.4.9)"
-> Export-Package: org.eclipse.jetty.http2.hpack; bundle-symbolic-name="org.eclipse.jetty.http2.hpack"; bundle-version="9.4.8.v20171121"; version="9.4.8"
org.eclipse.jetty.http2.hpack [48]
Unresolved requirement: Require-Capability: osgi.extender; filter:="(osgi.extender=osgi.serviceloader.registrar)"
Unresolved requirement: Import-Package: org.eclipse.jetty.http2; version="[9.4.8,9.4.9)"
-> Export-Package: org.eclipse.jetty.http2; bundle-symbolic-name="org.eclipse.jetty.http2.common"; bundle-version="9.4.8.v20171121"; version="9.4.8"; uses:="org.eclipse.jetty.http2.api,org.eclipse.jetty.http2.frames,org.eclipse.jetty.http2.generator,org.eclipse.jetty.http2.parser,org.eclipse.jetty.io,org.eclipse.jetty.util,org.eclipse.jetty.util.annotation,org.eclipse.jetty.util.component,org.eclipse.jetty.util.log,org.eclipse.jetty.util.thread"
Unresolved requirement: Import-Package: org.eclipse.jetty.http2.parser; version="[9.4.8,9.4.9)"
-> Export-Package: org.eclipse.jetty.http2.parser; bundle-symbolic-name="org.eclipse.jetty.http2.common"; bundle-version="9.4.8.v20171121"; version="9.4.8"; uses:="org.eclipse.jetty.http,org.eclipse.jetty.http2.frames,org.eclipse.jetty.http2.hpack,org.eclipse.jetty.io,org.eclipse.jetty.util.log"
Unresolved requirement: Import-Package: org.eclipse.jetty.http2.frames; version="[9.4.8,9.4.9)"
-> Export-Package: org.eclipse.jetty.http2.frames; bundle-symbolic-name="org.eclipse.jetty.http2.common"; bundle-version="9.4.8.v20171121"; version="9.4.8"; uses:="org.eclipse.jetty.http"
Unresolved requirement: Import-Package: org.eclipse.jetty.http2.api.server; version="[9.4.8,9.4.9)"
-> Export-Package: org.eclipse.jetty.http2.api.server; bundle-symbolic-name="org.eclipse.jetty.http2.common"; bundle-version="9.4.8.v20171121"; version="9.4.8"; uses:="org.eclipse.jetty.http2.api"
Unresolved requirement: Import-Package: org.eclipse.jetty.http2.generator; version="[9.4.8,9.4.9)"
-> Export-Package: org.eclipse.jetty.http2.generator; bundle-symbolic-name="org.eclipse.jetty.http2.common"; bundle-version="9.4.8.v20171121"; version="9.4.8"; uses:="org.eclipse.jetty.http,org.eclipse.jetty.http2.frames,org.eclipse.jetty.http2.hpack,org.eclipse.jetty.io"

!ENTRY org.eclipse.jetty.http2.hpack 2 0 2018-01-22 16:36:39.033
!MESSAGE Could not resolve module: org.eclipse.jetty.http2.hpack [48]
Unresolved requirement: Require-Capability: osgi.extender; filter:="(osgi.extender=osgi.serviceloader.registrar)"`

[joakime]

You need a ServiceLoader implementation in OSGi for Jetty to work.

Eclipse OSGi apparently does not include one, hence the need for Apache Aries SPI Fly.
https://www.eclipse.org/forums/index.php/t/474446/

[joakime]

Apache Aries SPI Fly is the RI (Reference Implementation) for ServiceLoader support in OSGI.
See http://blog.osgi.org/2013/02/javautilserviceloader-in-osgi.html

[joakime]

According to that last article on osgi.org, wikipedia is the official source for listing the implementations of the various OSGi specs.

For the ServiceLoader Mediator ...
https://en.wikipedia.org/wiki/OSGi_Specification_Implementations#133:_Service_Loader_Mediator_Specification

Apache Aries SPI Fly is the only implementation.

[joakime]

Also note, that for HTTP/2, you'll need ALPN support.

If your runtime is Java 8, then you'll need an alpn-boot.jar loaded via the JVM -Xbootclasspath/p: features for the specific JVM version you are running.

For OSGi, you'll also need the jetty-osgi-alpn jar.

See: https://www.eclipse.org/jetty/documentation/9.4.x/alpn-chapter.html

If your runtime is Java 9, you can use the Java 9 support library jetty-alpn-java-server (instead of the -Xbootclasspath/p: stuff and the alpn-boot.jar)

[Hepale]

"I edited the Plug-ins tab on the Run Configuration and checked org.eclipse.equinox.ds and clicked "Add Required Plug-ins". That fixed it."
https://bugs.eclipse.org/bugs/show_bug.cgi?id=494913#c2