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https://issues.apache.org/jira/browse/SOLR-7339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15036185#comment-15036185
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Joakim Erdfelt commented on SOLR-7339:
--------------------------------------

The Jetty Project developers took a look at this and ...

If you turn on DEBUG logging for Jetty, you'll see that the test does not send 
correct data to the server.
The request that fails sends data using chunked encoding, but sends one chunk 
of length 0x59, but does not send the terminal chunk.
The logs show Jetty reporting that the processing is complete but with 
unconsumed input, and therefore closes the connection.
Could this be a Solr client bug in disguise?

Look at the attached 
SolrExampleStreamingBinaryTest.testUpdateField-jetty93.pcapng

Filter: tcp.stream eq 4

POST /solr/collection1/update?wt=javabin&version=2 HTTP/1.1
User-Agent: Solr[org.apache.solr.client.solrj.impl.HttpSolrClient] 1.0
Content-Type: application/javabin
Transfer-Encoding: chunked
Host: 127.0.0.1:52488
Connection: Keep-Alive

59
...&params..&delByQ..'docsMap.....?...."id&unique.)_version_....4.....'price_f
..#setT...
HTTP/1.1 409 Conflict
Date: Tue, 01 Dec 2015 19:44:38 GMT
Content-Type: application/octet-stream
Content-Length: 144
Server: Jetty(9.3.6.v20151106)

....responseHeader..&statusY..%QTimeP..%error..#msg?4version conflict for 
unique expected=1519385657324077057 actual=1519385657324077056.$codeY.

> Upgrade Jetty from 9.2 to 9.3
> -----------------------------
>
>                 Key: SOLR-7339
>                 URL: https://issues.apache.org/jira/browse/SOLR-7339
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Gregg Donovan
>            Assignee: Shalin Shekhar Mangar
>             Fix For: Trunk, 6.0
>
>         Attachments: SOLR-7339.patch, SOLR-7339.patch, 
> SolrExampleStreamingBinaryTest.testUpdateField-jetty92.pcapng, 
> SolrExampleStreamingBinaryTest.testUpdateField-jetty93.pcapng
>
>
> Jetty 9.3 offers support for HTTP/2. Interest in HTTP/2 or its predecessor 
> SPDY was shown in [SOLR-6699|https://issues.apache.org/jira/browse/SOLR-6699] 
> and [on the mailing list|http://markmail.org/message/jyhcmwexn65gbdsx].
> Among the HTTP/2 benefits over HTTP/1.1 relevant to Solr are:
> * multiplexing requests over a single TCP connection ("streams")
> * canceling a single request without closing the TCP connection
> * removing [head-of-line 
> blocking|https://http2.github.io/faq/#why-is-http2-multiplexed]
> * header compression
> Caveats:
> * Jetty 9.3 is at M2, not released.
> * Full Solr support for HTTP/2 would require more work than just upgrading 
> Jetty. The server configuration would need to change and a new HTTP client 
> ([Jetty's own 
> client|https://github.com/eclipse/jetty.project/tree/master/jetty-http2], 
> [Square's OkHttp|http://square.github.io/okhttp/], 
> [etc.|https://github.com/http2/http2-spec/wiki/Implementations]) would need 
> to be selected and wired up. Perhaps this is worthy of a branch?



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