DELETEREPLICA / Core-UNLOAD blocks/hangs

We have scripts that use the Solr Replica management APIs. The scripts use the async parameter and poll for it to be finished. Fairly regularly the DELETEREPLICA action will *never* finish. I have eventually enabled enough logging to see that it is spinning on this: > INFO (parallelCoreAdminExe

Trying to understand cross-collection-join routing/hashing choices and behavior

I'm trying to understand the cross-collection JOIN documentation, behavior, choices, and viability. *# Terminology language choice* """routerField - If the documents are routed to shards using the