Solrj cannot connect to zookeeper from Solr Cloud Example

Question

I started a Solrcloud by running the included example bin/solr -e cloud, and in that case, I managed to start up a three nodes Solr cloud and created a gettingstarted collection:

http://localhost:8983/solr/admin/collections?action=CREATE&name=gettingstarted&numShards=3&replicationFactor=2&maxShardsPerNode=2&collection.configName=gettingstarted

I think it comes with a embedded zookeeper running on port 9983 because I saw this output when I started the cloud:

...
Starting up Solr on port 7574 using command:
bin/solr start -cloud -p 7574 -s "example/cloud/node2/solr" -z localhost:9983
Waiting up to 30 seconds to see Solr running on port 7574 [/] 
... 

However, when I tried to connect to the SolrCloud using SolrJ, it failed with the error message:

Exception in thread "main" org.apache.solr.common.SolrException: Cannot connect to cluster at localhost:9983/solr: cluster not found/not ready

Can anyone help me understand what is going on here?

Answer 1

The code fails because you are trying to point the CloudSolrServer to a znode that does not exist. Your zkhost is not configured with a /solr chroot. The configs seem to be stored at the root node.

So change the line

String zkHostString = "localhost:9983/solr";

to

String zkHostString = "localhost:9983";

and your code should work.

Answer 2

It depends on your zkHost. If your zkHost contains /solr , then it should be localhost:2181/solr or localhost:9983/solr; Otherwise , localhost:yourport