HoustonPutman commented on code in PR #2432:
URL: https://github.com/apache/solr/pull/2432#discussion_r1588098873
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solr/core/src/java/org/apache/solr/cloud/ZkController.java:
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@@ -2849,9 +2834,14 @@ public boolean
checkIfCoreNodeNameAlreadyExists(CoreDescriptor dcore) {
* Best effort to set DOWN state for all replicas on node.
*
* @param nodeName to operate on
+ * @return the names of the collections that have replicas on the given node
*/
- public void publishNodeAsDown(String nodeName) {
+ public Collection<String> publishNodeAsDown(String nodeName) {
log.info("Publish node={} as DOWN", nodeName);
+
+ ClusterState clusterState = cc.getZkController().getClusterState();
+ Map<String, List<Replica>> replicasPerCollectionOnNode =
+ clusterState.getReplicaNamesPerCollectionOnNode(nodeName);
Review Comment:
I guess I am handwaving a bit. But if all cluster-mutating events go through
the overseer, then the overseer should have all the most recent versions of all
collections, right? (Sure, it won't have the states of collections that have
not been referenced since the node became overseer, but that issue goes away
after the first "node-down" event)
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