[jira] [Commented] (COUCHDB-3006) Source failure in one source to many target replications causes a stampede

["ASF subversion and git services (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/COUCHDB-3006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15274305#comment-15274305 ] 

ASF subversion and git services commented on COUCHDB-3006:
----------------------------------------------------------

Commit 13326bb4b265c09c37f8088c6432f80f495ef0cd in couchdb-couch-replicator's branch refs/heads/master from [~kzx]
[ https://git-wip-us.apache.org/repos/asf?p=couchdb-couch-replicator.git;h=13326bb ]

Add jittered delay during replication error handling

For one-to-many replications, when source fails, it can create a stampede
effect. A jittered delay is used to avoid that. Delay is random, in a range
proportional to current number of replications, with a maximum of 1 minute.

Seed random number generator within each replication process with a
non-deterministic value, otherwise the same sequence of delays is generated
for all replications.

Jira: COUCHDB-3006


> Source failure in one source to many target replications causes a stampede
> --------------------------------------------------------------------------
>
>                 Key: COUCHDB-3006
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-3006
>             Project: CouchDB
>          Issue Type: Bug
>            Reporter: Nick Vatamaniuc
>
> For multiple replications from a single source to multiple targets. If source fails, all replications post an error state back their replication document and attempt to restart. This creates a stampede effect and causes sharp load spikes on the replication cluster.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)