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From "Noble Paul (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-5580) SOLR-5311 was done without full understanding of the system and must be reverted.
Date Thu, 02 Jan 2014 11:06:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-5580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13860134#comment-13860134
] 

Noble Paul commented on SOLR-5580:
----------------------------------

[~stanleyyang] what is your normal workflow?

* how do you create  your collection? I mean what is a typical command to create a collection?
* what is your typical coreNodeName? How does your specific coreNodeName help you failover
quickly? 
* What will happen if a core comes up after you replace it with another? it should be replacing
your new core with the old core in that case. How do you deal with that?

How about just creating a new core w/o a coreNodeName (only collection name and slice name)
? In that case you never need to worry about coreNodeName at all


> 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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