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From "Erick Erickson (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-11069) CDCR bootstrapping causes a core reload which loses the state of a bootstrap leading to infinite bootstrapping
Date Sun, 13 Aug 2017 04:51:01 GMT

     [ https://issues.apache.org/jira/browse/SOLR-11069?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Erick Erickson updated SOLR-11069:
----------------------------------
    Summary: CDCR bootstrapping causes a core reload which loses the state of a bootstrap
leading to infinite bootstrapping  (was: LASTPROCESSEDVERSION for CDCR is flawed when buffering
is enabled)

> CDCR bootstrapping causes a core reload which loses the state of a bootstrap leading
to infinite bootstrapping
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-11069
>                 URL: https://issues.apache.org/jira/browse/SOLR-11069
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: CDCR
>    Affects Versions: 7.0
>            Reporter: Amrit Sarkar
>            Assignee: Erick Erickson
>
> {{LASTPROCESSEDVERSION}} (a.b.v. LPV) action for CDCR breaks down due to poorly initialised
and maintained buffer log for either source or target cluster core nodes.
> If buffer is enabled for cores of either source or target cluster, it return {{-1}},
*irrespective of number of entries in tlog read by the {{leader}}* node of each shard of respective
collection of respective cluster. Once disabled, it starts telling us the correct LPV for
each core.
> Due to the same flawed behavior, Update Log Synchroniser may doesn't work properly as
expected, i.e. provides incorrect seek to the {{non-leader}} nodes to advance at. I am not
sure whether this is an intended behavior for sync but it surely doesn't feel right.



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