I just started to learn solr with official documentation and during the first exercise "Index Techproducts Example Data" I failed due to following error: " Failed to create collection 'techproducts' due to: Underlying core creation failed while creating collection: techproducts".
I tried to change java version from 13 to 8 but it didn't helped.
Here is link to the documentation: https://lucene.apache.org/solr/guide/8_5/solr-tutorial.html#exercise-1
Stacktrace from solr Admin console
Collection: techproducts operation: create failed:org.apache.solr.common.SolrException: Underlying core creation failed while creating collection: techproducts
at org.apache.solr.cloud.api.collections.CreateCollectionCmd.call(CreateCollectionCmd.java:304)
at org.apache.solr.cloud.api.collections.OverseerCollectionMessageHandler.processMessage(OverseerCollectionMessageHandler.java:263)
at org.apache.solr.cloud.OverseerTaskProcessor$Runner.run(OverseerTaskProcessor.java:504)
at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:210)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
I had run into similar situation while following Solr 's official tutorial as following
ā solr-8.7.0 ERROR: Failed to create collection 'techproducts' due to: Underlying core creation failed while creating collection: techproducts
And problem solved my turning off my vpn. I guess the vpn routing probably messed up with solr's localhost setting somehow.