Getting IOException when used basic authentication on the time of indexing in Solr 8.9.0

[Vishal Patel]

I have install solr 8.9.0 in cloud mode. I have created 2 shards. I have 
enabled the Basic Authentication using security.json. not use the authorization 
part.
security.json
{
  "authentication":{
    "blockUnknown": true,
    "class":"solr.BasicAuthPlugin",
    "credentials":{"solr":"Y6xFaUPypZOWNmgaU+IkZ8eP4TJxXW50= 
bWtoYjk2Yjhscmx6a2Jveg=="},
    "realm":"My Solr users",
    "forwardCredentials": false
  }
}

Using below command upload security.json in zookeeper
solr zk cp file:D:\Asite_work\Solr_8.9.0\shard1\bin\security.json 
zk:/security.json -z "localhost:12181,localhost:12182"

When I hit http://localhost:8983/solr I got the Basic Authentication page and 
after enter the successful login details it worked properly but when I try to 
index using code I am getting the ERROR
org.apache.solr.client.solrj.impl.CloudSolrClient$RouteException: IOException 
occurred when talking to server at: 
http://localhost:8983/solr/documents_shard1_replica_n1

My index code is below

final List<String> zkServers = new ArrayList<>();
zkServers.add("localhost:12181");
zkServers.add("localhost:12182");
CredentialsProvider provider = new BasicCredentialsProvider();
UsernamePasswordCredentials credentials = new 
UsernamePasswordCredentials("solr", "Abc@123");
provider.setCredentials(AuthScope.ANY, credentials);
HttpClient client = 
HttpClientBuilder.create().setDefaultCredentialsProvider(provider).build();
CloudSolrClient sc = new CloudSolrClient.Builder(zkServers, 
Optional.empty()).withParallelUpdates(true).withHttpClient(client).build();
sc.setDefaultCollection("documents");
sc.connect();
UpdateResponse resp = sc.add(docs, SolrConstants.COMMIT_WITHIN);

Can anyone help me why I am getting this error? Anything's need to configure in 
zookeeper?

Regards,
Vishal