[jetty-users] Mng http2-hpack jar causes connection to time out rather t

[Shawn Heisey <eclipse@xxxxxxxxxxxx>]

Referring to this thread on the solr user mailing list:

https://lists.apache.org/thread/y61xo5pqx5xhq4mz8okd2nmptz1drnl0

This user was seeing timeouts when trying to use SolrJ's Http2SolrClient 
object in HTTP/2 mode.  Setting it to use http 1.1 made it work 
properly.  I built a test program that worked fine.

By comparing my test program to their program, the user found that they 
were missing the http2-hpack jar.  Once they added it, the problem went 
away.

Should this be reported as a bug?  I think that the program should have 
done one of two things as a result of the missing jar:

* Throw an exception (maybe ClassNotFoundException), ideally stating 
that HPACK header compression is not possible because the implementation 
is missing.

* Proceed without HPACK, logging a message at WARN about it.  This 
assumes that http2 CAN operate without hpack.  If http2 requires hpack, 
then I think it should not be in a separate jar from the main http2 
implementation.  I read through the http2 RFC when it was first 
released, but I admit that I do not remember whether or not hpack was 
required.

Thanks,
Shawn