[
https://issues.apache.org/jira/browse/SOLR-12969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16683505#comment-16683505
]
ASF subversion and git services commented on SOLR-12969:
--------------------------------------------------------
Commit f357c06276139defa26d0569fe5903cfd3d66cdb in lucene-solr's branch
refs/heads/master from [~caomanhdat]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=f357c06 ]
SOLR-12969: Inconsistency with leader when PeerSync return ALREADY_IN_SYNC
> Inconsistency with leader when PeerSync return ALREADY_IN_SYNC
> --------------------------------------------------------------
>
> Key: SOLR-12969
> URL: https://issues.apache.org/jira/browse/SOLR-12969
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: replication (java)
> Affects Versions: 6.6.5, 7.5
> Reporter: Jeremy Smith
> Assignee: Cao Manh Dat
> Priority: Major
> Attachments: SOLR-12969.patch, SOLR-12969.patch, SOLR-12969.patch
>
>
> Under certain circumstances, replication fails between a leader and follower.
> The follower will not receive updates from the leader, even though the
> leader has a newer version. If the leader is restarted, it will get the
> older version from the follower.
>
> This was discussed on the [mailing
> list|https://mail-archives.apache.org/mod_mbox/lucene-solr-user/201810.mbox/%3CBYAPR04MB4406710795EA07E93BF80913ADCD0%40BYAPR04MB4406.namprd04.prod.outlook.com%3E]
> and [~risdenk] [wrote a
> script|https://github.com/risdenk/test-solr-start-stop-replica-consistency]
> that demonstrates this error. He also verified that the error occurs when
> the script is run outside of docker.
>
> Here is the scenario of the failure:
> * A collection with 1 shards and 2 replicas
> * Stop non-leader replica (B)
> * Index more than 100 documents to the collection
> * Start replica B, it failed to do PeerSync and starts segments replication
> * Index document 101th to the collection
> ** Leader's tlog: [1, 2, 3, ..., 100, 101]
> ** Replica's tlog: [101]
> * Stop replica B
> * Index document 102th to the collection
> * Start replica B, on doing PeerSync
> ** Leader's tlog: [1, 2, 3, ..., 100, 101, 102]
> ** Replica's tlog: [101]
> ** Leader's high (80th): 80
> ** Replica's low: 101
> ** By comparison: replica's low > leader's high => ALREADY_IN_SYNC
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
