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  1. Solr
  2. SOLR-4075

Upon removing the last core of a shard, the shard is not removed from the cluster state.

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 4.0
    • Fix Version/s: 4.1, 6.0
    • Component/s: SolrCloud
    • Labels:

      Description

      Simple Repro of this issue: which now I thought was related to the decision made in: https://issues.apache.org/jira/browse/SOLR-3080 but Mark tells me might have been a problem during the zk layout refactoring right before 4.0.

      1. Download SOLR 4 production and extract.
      2. Replace solr.xml in apache-solr-4.0.0/example/solr/solr.xml with:

      <?xml version="1.0" encoding="UTF-8" ?>
      <solr persistent="true">
      <cores adminPath="/admin/cores" defaultCoreName="collection1" host="${host:}" hostPort="${jetty.port:}" hostContext="${hostContext:}" zkClientTimeout="${zkClientTimeout:15000}">
      <core shard="shard1" instanceDir="collection1/" name="collection1" collection="polecat"/>
      <core shard="shard1" instanceDir="collection2/" name="collection2" collection="polecat"/>
      <core schema="schema.xml" shard="core3" instanceDir="core3/" name="core3" config="solrconfig.xml" collection="polecat" dataDir="data"/>
      </cores>
      </solr>

      3. Start solr with: java -Dbootstrap_confdir=./solr/collection1/conf -Dcollection.configName=myconf -DzkRun -Dsolrcloud.skip.autorecovery=true -jar start.jar
      (skip.autorecovery is used because the shards don't exist previously)

      Then run this:
      Sanity query: http://localhost:8983/solr/polecat/select?q=*%3A*&wt=xml&distrib=true
      Remove the core: http://localhost:8983/solr/admin/cores?action=UNLOAD&core=core3&deleteIndex=true
      Error query: http://localhost:8983/solr/polecat/select?q=*%3A*&wt=xml&distrib=true

      And the sanity query, we will receive 0 records, the error query "no servers hosting shard:". And in the clusterstate.json: "core3":{"replicas":{}}}}

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            • Assignee:
              markrmiller@gmail.com Mark Miller
              Reporter:
              comeaugilles Gilles Comeau
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              • Created:
                Updated:
                Resolved: