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https://issues.apache.org/jira/browse/SOLR-15585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17403285#comment-17403285
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Mike Drob commented on SOLR-15585:
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Can you be more specific on the timeline events? If the PULL replica has a
sufficiently long polling period (i.e. 1 hour), then it seems reasonable to me
that a TLOG leader can shut down without the PULL follower having sync'd, but I
am not sure that qualifies as data loss. Maybe if the PULL replica index
somehow gets corrupted by a partial sync?
> Graceful shutdown can cause data loss with PULL replicas
> --------------------------------------------------------
>
> Key: SOLR-15585
> URL: https://issues.apache.org/jira/browse/SOLR-15585
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Ishan Chattopadhyaya
> Priority: Major
>
> When using TLOG (leader)+PULL replicas, a clean shutdown of the node
> containing leaders (for which PULL replicas exist on other nodes) can be
> complete even before PULL replicas get a chance to sync all recently
> committed segments. One solution can be to have a check and enforce a
> replication on the node containing the leaders of such shards before shutting
> down.
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