On 3/6/2015 3:25 AM, manju16832003 wrote: > Solr 5 has been released. I was just giving a try and come across the same > issue. As I heard over from some documentation, Solr 5 doesn't come with > default core (example in earlier versions). And this requires us to create > a core from Solr Admin. When I tried to create the core, I get the following > error > > Error CREATEing SolrCore 'inventory': Unable to create core [inventory] > Caused by: Can't find resource 'solrconfig.xml' in classpath or > '/Users/manjunath.reddy/Programming/Solr/solr-5.0.0/server/solr/inventory/conf' > > > So I had to manually create the core based on my previous experience with > Solr 4.10 version. > I guess its quite misleading for new users of Solr. I like the older > versions of Solr that comes with default cores so that It would be easier to > follow up on.
Unless you are in SolrCloud mode, creating cores via the admin UI (or the /admin/cores HTTP API) requires that the core directory and its conf subdirectory with solrconfig.xml, schema.xml, and other potential files must already exist in the indicated location. There's a note right on the screen for "Add Core" that says this: "instanceDir and dataDir need to exist before you can create the core". This was the case for 4.x as well as 5.0. That note is slightly misleading ... the dataDir does not need to exist, just instanceDir and the conf directory. Solr will create the dataDir and its contents, if the user running Solr has permission. There is a configsets functionality that's new in recent versions which very likely will make it possible to create a core completely from scratch within the admin UI in non-cloud mode, but I do not know anything about using it, and I do not think the functionality is exposed in the admin UI yet. Learning about cores and/or collections and how to create them is a hugely important part of using Solr. In 4.x, users did not need to do anything to get their first core, and that fact has led to many problems. New users don't know how to add a core, and many do not even know about cores at all. This requires that they must learn about the core/collection concepts, and many of them cannot find any info about the procedure, so they ask for help. I am glad to help out both here and on the IRC channel, but it improves the experience of everyone involved if users become familiar with the concept and methods on their own. Thanks, Shawn
