cannot create core in solrj with embeddedsolrserver - solrj

Question

this is my code:
File home = new File(System.getProperty("solr.solr.home"));
CoreContainer container = new CoreContainer(home.getAbsolutePath());
CoreAdminRequest.Create create = new CoreAdminRequest.Create();
create.setCoreName("newCoreName");
create.setCoreNodeName("newCoreName");
create.setAction(CoreAdminAction.CREATE);
create.setInstanceDir(home.getAbsolutePath());
create.process(new EmbeddedSolrServer(container, ""));
When I run this, I get "no such core: "" " exception.
If I change it to:
create.process(new EmbeddedSolrServer(container, "newCoreName"));
I get "no such core: "newCoreName" " exception.
Please help me...

Answer 1

We have found there are two things required to create a core:
1) There has to be a default core
2) The directory to be used for the new core should be created.
The solr.xml is as below:
<?xml version="1.0" encoding="UTF-8" ?>
<solr persistent="false">
<cores defaultCoreName="empty" adminPath="/admin/cores">
<core instanceDir="empty/" name="empty"/>
</cores>
</solr>
To create a new core do the following:
File home = new File(scfg.getIndexHome());
File solr = new File(home, "solr.xml");
String corename = "newcore";
CoreContainer container = new CoreContainer(home, solr);
//create the directory
File f = new File(home, corename); f.mkdirs();
SolrServer server = new EmbeddedSolrServer(container, "empty"); //default
//create the core
CoreAdminRequest.createCore(corename, corename, server, "solrconfig.xml", "schema.xml");
//persist it in the solr.xml
CoreAdminRequest.persist("solr.xml", server);
SolrServer servernew = new EmbeddedSolrServer(container, corename);