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https://issues.apache.org/jira/browse/SOLR-5580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13860127#comment-13860127
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YouPeng Yang commented on SOLR-5580:
------------------------------------

By the way. We use the corenodename since the solr 4.4. However things go wrong 
when we decide to upgrade to 4.6.  
   It troubles me for a long time. No one gives any help,neither the reference 
doc nor the CHANGES of solr 4.6 do no make any announcement about the change 
,which is bad for users. 

   I even am not clear about what your autocreated check aim at.


发自我的 iPhone

在 2014-1-1,22:40,"Noble Paul (JIRA)" <[email protected]> 写道:



> SOLR-5311 was done without full understanding of the system and must be 
> reverted.
> ---------------------------------------------------------------------------------
>
>                 Key: SOLR-5580
>                 URL: https://issues.apache.org/jira/browse/SOLR-5580
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 4.6
>         Environment: OS:Red Hat Enterprise Linux Server release 6.4 (Santiago)
> Software:solr 4.6,
>                jdk:OpenJDK Runtime Environment (rhel-2.3.4.1.el6_3-x86_64)
>                     OpenJDK 64-Bit Server VM (build 23.2-b09, mixed mode)
>            Reporter: YouPeng Yang
>            Assignee: Mark Miller
>              Labels: core
>             Fix For: 5.0, 4.7, 4.6.1
>
>   Original Estimate: 0.5h
>  Remaining Estimate: 0.5h
>
> In class org.apache.solr.cloud.Overseer the Line 360:
> ---------------------------------------------------------------------
>           if (sliceName !=null && collectionExists &&  
> !"true".equals(state.getCollection(collection).getStr("autoCreated"))) {
>             Slice slice = state.getSlice(collection, sliceName);
>             if (slice.getReplica(coreNodeName) == null) {
>               log.info("core_deleted . Just return");
>               return state;
>             }
>           }
> ---------------------------------------------------------------------
> the slice needs to be checked null .because when create a new core with both 
> explicite shard and coreNodeName, the state.getSlice(collection, sliceName)  
> may return a null.So it needs to be checked ,or there will be an 
> NullpointException
> ---------------------------------------------------------------------
>           if (sliceName !=null && collectionExists &&  
> !"true".equals(state.getCollection(collection).getStr("autoCreated"))) {
>             Slice slice = state.getSlice(collection, sliceName);
>             if (slice != null && slice.getReplica(coreNodeName) == null) {
>               log.info("core_deleted . Just return");
>               return state;
>             }
>           }
> ---------------------------------------------------------------------



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