You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@lucene.apache.org by da...@apache.org on 2018/03/09 12:36:34 UTC
lucene-solr:branch_7x: SOLR-12051: Update upgrade notes
Repository: lucene-solr
Updated Branches:
refs/heads/branch_7x 4d64e7bcb -> 3b6649faa
SOLR-12051: Update upgrade notes
Project: http://git-wip-us.apache.org/repos/asf/lucene-solr/repo
Commit: http://git-wip-us.apache.org/repos/asf/lucene-solr/commit/3b6649fa
Tree: http://git-wip-us.apache.org/repos/asf/lucene-solr/tree/3b6649fa
Diff: http://git-wip-us.apache.org/repos/asf/lucene-solr/diff/3b6649fa
Branch: refs/heads/branch_7x
Commit: 3b6649faab1ed45cfd2a5507e042262691f6ea25
Parents: 4d64e7b
Author: Cao Manh Dat <da...@apache.org>
Authored: Fri Mar 9 19:35:26 2018 +0700
Committer: Cao Manh Dat <da...@apache.org>
Committed: Fri Mar 9 19:36:23 2018 +0700
----------------------------------------------------------------------
solr/CHANGES.txt | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/lucene-solr/blob/3b6649fa/solr/CHANGES.txt
----------------------------------------------------------------------
diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index 79652d3..b33c30f 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -58,11 +58,13 @@ Upgrade Notes
* LUCENE-8161: If you are using the spatial JTS library with Solr, you must upgrade to 1.15.0. This new version
of JTS is now dual-licensed to include a BSD style license.
-* SOLR-12051: By using term value introduced in SOLR-11702, a replica will know that it is in-sync with the leader or not.
- If all the replicas who participate in the election are out-of-sync with previous leader, the election will hang for
- leaderVoteWait before allowing out-of-sync with previous leader replicas become leader. Note that the new leader
- still needs to contains more updates than any other active replicas in the same shard. Therefore by increasing
- leaderVoteWait will increase the consistency (over availability) of the system.
+* SOLR-12051: A new mechanism is introduced in SOLR-11702 to maintain consistency in SolrCloud between leader and replicas.
+ This mechanism lets Solr know whether a replica is in-sync with the leader or not, even when the leader is not live.
+ If all the replicas who participate in the leader election are out-of-sync with previous leader, the election will
+ pause until a timeout (named "leaderVoteWait") before allowing an out-of-sync replica to become leader. Note that the
+ new leader still needs to contains more updates than any other active replicas in the same shard. Therefore by
+ increasing leaderVoteWait will increase the consistency (over availability) of the system. The default value of
+ leaderVoteWait is 180,000 ms (3 minutes) and it can be adjusted in the "solrcloud" section of the solr.xml
* SOLR-11957: The default Solr log file size and number of backups is raised to 32MB and 10 respectively