http2-hpack not visible in OSGi

[janbartel]

Reported on stackoverflow: http://stackoverflow.com/questions/41870597/jetty-9-http-2-in-osgi-container-cannot-load-a-httpfieldpreencoder-implementati

[janbartel]

Fixed in jetty-9.4.x master ready for 9.4.2 release.

[akurtakov]

This causes issues for Eclipse Platform. See https://bugs.eclipse.org/bugs/show_bug.cgi?id=512807 . Can we workaround it on our side somehow to not distribute apache aries bundles too?

[joakime]

Out of curiosity, how does the Eclipse Help system operate with HTTP/2?
HTTP/2 support requires a JVM specific Xbootclasspath setup to function.

Perhaps the Eclipse Help system should not rely on HTTP/2?
Just exclude the HTTP/2 components from your environment (they are optional anyway)

[joakime]

@akurtakov Jetty 9.4.2.v20170220 has been released.

[mbooth101]

Eclipse does not use http2, we use the "jetty-http" bundle only.

[joakime]

@mbooth101 then exclude all of the http2 jars/bundles/components, they are not needed/used, and are optional for Jetty.

[mbooth101]

@joakime As discussed in the Eclipse bug quoted by akurtakov above ( https://bugs.eclipse.org/bugs/show_bug.cgi?id=512807 ) the problem is that this change added the following non-optional dep to the jetty-http bundle:

Require-Capability: osgi.extender;filter:="osgi.extender=osgi.serviceloader.processor)"

It's not a case of excluding http2 bundles, it's a case of this new requirement causing bundle resolution failures because a new non-optional dependency was added to jetty-http. Since Eclipse can use jetty fine without Apache Aries bundles, we believe this dependency should be made optional.

Let me submit a PR to illustrate what change I would like to see made.

[mbooth101]

Please see PR #1365