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https://issues.apache.org/jira/browse/SOLR-11990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16597416#comment-16597416
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Shalin Shekhar Mangar commented on SOLR-11990:
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Simple {{SOLR-11990-fix.patch}} to fix the regression. I'll commit this once
precommit and tests pass. I've fixed this because it is a change in behavior
from before but the bug is bigger than this fix alone. Any exception after the
collection is created in ZK can cause the same problem. I'll open a separate
issue to fix the full problem.
> Make it possible to co-locate replicas of multiple collections together in a
> node
> ---------------------------------------------------------------------------------
>
> Key: SOLR-11990
> URL: https://issues.apache.org/jira/browse/SOLR-11990
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Components: AutoScaling, SolrCloud
> Reporter: Shalin Shekhar Mangar
> Assignee: Shalin Shekhar Mangar
> Priority: Major
> Fix For: master (8.0), 7.5
>
> Attachments:
> SOLR-11990-TestWithCollection-testDeleteWithCollection-fixes.patch,
> SOLR-11990-fix.patch, SOLR-11990.patch, SOLR-11990.patch, SOLR-11990.patch,
> SOLR-11990.patch, SOLR-11990.patch, SOLR-11990.patch, SOLR-11990.patch
>
>
> It is necessary to co-locate replicas of different collection together in a
> node when cross-collection joins are performed.
> while creating a collection specify the parameter
> {{withCollection=other-collection-name}} . This ensure that Solr always
> ensure that atleast one replica of {{other-collection}} is present with this
> collection replicas
> This requires changing create collection, create shard and add replica APIs
> as well because we want a replica of collection A to be created first before
> a replica of collection B is created so that join queries etc are always
> possible.
> Some caveats to this implementation:
> # The {{other-collection}} should only have a single shard named "shard1"
> # Any replica of {{other-collection}} created by this feature will be of NRT
> type
> Removing the above caveats can be a goal of other issues.
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