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Subject [lucene-solr] branch branch_8x updated: Upgrade CHANGES.txt for http2 changes
Date Thu, 17 Jan 2019 16:35:00 GMT
This is an automated email from the ASF dual-hosted git repository.

datcm pushed a commit to branch branch_8x
in repository

The following commit(s) were added to refs/heads/branch_8x by this push:
     new 558d992  Upgrade CHANGES.txt for http2 changes
558d992 is described below

commit 558d99201ab6f9300f27b93121364c242ab2fea9
Author: Cao Manh Dat <>
AuthorDate: Thu Jan 17 16:31:09 2019 +0000

    Upgrade CHANGES.txt for http2 changes
 solr/CHANGES.txt | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index af19e3f..129b684 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -31,6 +31,19 @@ Jetty 9.4.14.v20181114
 Upgrade Notes
+* Solr nodes can now listen and serve HTTP/2 requests. Most of internal requests (sent by
UpdateShardHandler, HttpShardHandler)
+  Http2SolrClient is used. Since by default, internal requests are sent by using HTTP/2,
+  Solr 8.0 nodes can't talk to old nodes (7.x). However we can follow these steps to do rolling
+  - Do rolling updates as normally, but the Solr 8.0 nodes must start with -Dsolr.http1=true
as startup parameter.
+    By using this parameter internal requests are sent by using HTTP/1.1
+  - When all nodes are upgraded to 8.0, restart them, this time -Dsolr.http1 parameter should
be removed.
+* ALPN is not supported in Java 8 or lower version therefore when a node started in Java
8 or a lower version with SSL enabled,
+  it will send and can only be able to handle HTTP/1.1 requests. In case of using SSL Java
9 or latter versions are recommended.
+* Custom AuthenticationPlugin must provide its own setup for Http2SolrClient through
+  implementing HttpClientBuilderPlugin.setup, if not internal requests can't be authenticated.
 * LUCENE-7996: The 'func' query parser now returns scores that are equal to 0
   when a negative value is produced. This change is due to the fact that
   Lucene now requires scores to be positive. (Adrien Grand)
@@ -54,7 +67,18 @@ Upgrade Notes
 * SOLR-12593: The "extraction" contrib (Solr Cell) no longer does any date parsing, and thus
no longer has the
   "date.formats" configuration.  To ensure date strings are properly parsed, use ParseDateFieldUpdateProcessorFactory
-  (an URP) commonly registered with the name "parse-date" in "schemaless mode".  (David Smiley,
Bar Rotstein)
+  (an URP) commonly registered with the name "parse-date" in "schemaless mode".  (David Smiley,
Bar Rotstein) 
+* SOLR-12643: Since Http2SolrClient does not support exposing connections related metrics.
These metrics are no longer
+  available 'QUERY.httpShardHandler.{availableConnections, leasedConnections, maxConnections,
+  'UPDATE.updateShardHandler.{availableConnections, leasedConnections, maxConnections, pendingConnections}'
+* SOLR-12605: UpdateShardHandler's updateOnlyClient is now a Http2SolrClient (previous HttpSolrClient).
This new
+  client does not support 'maxConnections','maxConnectionsPerHost' parameters.
+* SOLR-12640: HttpShardHandlerFactory's defaultClient is now a Http2SolrClient (previous
HttpSolrClient). This new
+  client does not support 'maxConnections','maxConnectionsPerHost' parameters. LBHttpSolrClient.Req
and LBHttpSolrClient.Rsp
+  are marked as deprecated, uses LBSolrClient.Req and LBSolrClient.Rsp instead.
 * SOLR-12754: The UnifiedHighlighter hl.weightMatches now defaults to true.  If there are
unforseen highlight problems,
   this may be the culprit.
@@ -100,6 +124,8 @@ New Features
 * SOLR-12730: Implement staggered SPLITSHARD requests in IndexSizeTrigger. (ab)
+* SOLR-12639: Umbrella JIRA for adding support HTTP/2 (Cao Manh Dat)
 Bug Fixes

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