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https://issues.apache.org/jira/browse/SOLR-4015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15538822#comment-15538822
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Alexandre Rafalovitch commented on SOLR-4015:
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Is this an issue in the latest Solr or something that was during 4.0 beta only?
> the collection create AIP may create a collection that user not expected when
> the solr-nodes number less than the request collection's replicas number
> -------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-4015
> URL: https://issues.apache.org/jira/browse/SOLR-4015
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.0-BETA, 4.0
> Reporter: Po Rui
> Labels: collction
> Fix For: 4.0-BETA, 4.0
>
> Attachments: OverseerCollectionProcessor.java,
> SOLR_4015-OverseerCollectionProcessor.patch
>
>
> the collection create AIP may create a collection that user not expected when
> the solr-nodes number less than the request collection's replicas number.EX.
> the cluster have 5 avalaible solr-nodes. than user want create a collection
> with API param "numShards=2&numReplicas=2". this will lead to a collection
> contained 2 shards but one own 2 replicas and another own 1 replica. More
> serious, this will lead a collection loss one shard while the API param is
> "numShards=3&numReplicas=2". this will confuse the user. this incomplete
> collection will confuse the user. so we should discard the colletion create
> action while the numLivedNode < numShards * (numReplicas + 1)
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