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https://issues.apache.org/jira/browse/SOLR-12088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16412212#comment-16412212
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Jerry Bao commented on SOLR-12088:
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[~caomanhdat] It seems to last forever though I cannot confirm 100%. Definitely
lasts past an hour. Why is the amount of LIR threads started decreasing as time
goes on?
> Shards with dead replicas cause increased write latency
> -------------------------------------------------------
>
> Key: SOLR-12088
> URL: https://issues.apache.org/jira/browse/SOLR-12088
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Affects Versions: 7.2
> Reporter: Jerry Bao
> Priority: Major
>
> If a collection's shard contains dead replicas, write latency to the
> collection is increased. For example, if a collection has 10 shards with a
> replication factor of 3, and one of those shards contains 3 replicas and 3
> downed replicas, write latency is increased in comparison to a shard that
> contains only 3 replicas.
> My feeling here is that downed replicas should be completely ignored and not
> cause issues to other alive replicas in terms of write latency.
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