I would like to know the Steps involved to remove an Apache Solr from Windows 10 Computer

Question

I am trying to uninstall an Apache Solr 8.4.1. in Windows 10 , but unsuccessful .
I was able to hard delete the Solr Install directory , but when tried to reinstall the Solr instance again in another location , it is throwing errors saying Core can not initialze :
Caused by:

javax.servlet.ServletException: javax.servlet.UnavailableException: Error processing the request. CoreContainer is either not initialized or shutting down.
    at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:162)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
    at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:322)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
    at org.eclipse.jetty.server.Server.handle(Server.java:500)
    at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
    at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)
    
    Could some one help with their Solr Expertise , Appreciate your helping hints.

Answer 1

Hi@Ganapathy,

There are several different possibilities for why you get this error. I recommend checking whether clusterstate.json is empty or not, which you can find in the Zookeeper-ensemble. It should only contain "{}". Further, on would I check whether you have any shards in the SOLR_HOME folder, and there on delete them. SOLR_HOME is normally found at ./server/solr/.

Hope that works.