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https://issues.apache.org/jira/browse/SOLR-13375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17365008#comment-17365008
 ] 

Gus Heck commented on SOLR-13375:
---------------------------------

Just saw this question, If you are talking about: 
{code:java}
   public void shutdown() {
+
+    ZkController zkController = getZkController();
+    if (zkController != null) {
+      OverseerTaskQueue overseerCollectionQueue = 
zkController.getOverseerCollectionQueue();
+      overseerCollectionQueue.allowOverseerPendingTasksToComplete();
+    }
     log.info("Shutting down CoreContainer instance=" + 
System.identityHashCode(this));
{code}
Yes I believe that is the point. See the later part of my comment on this issue 
dated July 5 2019

> 2 Dimensional Routed Aliases
> ----------------------------
>
>                 Key: SOLR-13375
>                 URL: https://issues.apache.org/jira/browse/SOLR-13375
>             Project: Solr
>          Issue Type: New Feature
>          Components: SolrCloud
>    Affects Versions: main (9.0)
>            Reporter: Gus Heck
>            Assignee: Gus Heck
>            Priority: Major
>         Attachments: SOLR-13375.patch, SOLR-13375.patch, SOLR-13375.patch, 
> SOLR-13375.patch, SOLR-13375.patch
>
>
> Current available routed aliases are restricted to a single field. This 
> feature will allow Solr to provide data driven collection access, creation 
> and management based on multiple fields in a document. The collections will 
> be queried and updated in a unified manner via an alias. Current routing is 
> restricted to the values of a single field. The particularly useful 
> combination at this time will be Category X Time routing but Category X 
> Category may also be useful. More importantly, if additional routing schemes 
> are created in the future (either as contributions or as custom code by 
> users) combination among these should be supported. 
> It is expected that not all combinations will be useful, and that 
> determination of usefulness I expect to leave up to the user. Some Routing 
> schemes may need to be limited to be the leaf/last routing scheme for 
> technical reasons, though I'm not entirely convinced of that yet. If so, a 
> flag will be added to the RoutedAlias interface.
> Initial desire is to support two levels, though if arbitrary levels can be 
> supported easily that will be done.
> This could also have been called CompositeRoutedAlias, but that creates a TLA 
> clash with CategoryRoutedAlias.



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