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https://issues.apache.org/jira/browse/SOLR-5580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13860148#comment-13860148
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YouPeng Yang commented on SOLR-5580:
------------------------------------
Hi
The create core URL:
http://10.7.23.122:8080/solr/admin/cores?action=CREATE&name=Test1&shard=Test&collection.configName=myconf&schema=schema.xml&config=solrconfigLocal_default.xml&collection=defaultcol&coreNodeName=Test1
We do not have the collection created first. Just create a new collection
when create the first core of a collection.
We use the corecodename to make distinguish the cores. As I said,the auto
created corenodename make it hard to identify which core the datadir belongs to
. Especially ,there are a lot of cores.
When a core crashed,as only as the data still exists, we can create a new
core use the same datadir. It is important when you have a shared storage,such
as NSF,even hdfs.
The failover we suppose that we can force multi core to share the same
data directory. At last , we give up after the some tests . Also, Mr mark
miller suggests we should not do that.
发自我的 iPhone
在 2014-1-2，19:05，"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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