The cores aren't loaded (or at least shouldn't be) for getting the status. The _names_ of the cores should be returned, but those are (supposed) to be retrieved from a list rather than loaded cores. So are you sure that's not what you are seeing? How are you determining whether the cores are actually loaded or not?
That said, it's perfectly possible that the status command is doing something we didn't anticipate, but I took a quick look at the code (got to rush to a plane) and CoreAdminHandler _appears_ to be just returning whatever info it can about an unloaded core for status. I _think_ you'll get more info if the core has ever been loaded though, even though if it's been removed from the transient cache. Ditto for the create action. So let's figure out whether you're really seeing loaded cores or not, and then raise a JIRA if so... Thanks for reporting! Erick On Thu, May 2, 2013 at 1:27 PM, didier deshommes <dfdes...@gmail.com> wrote: > Hi, > I've been very interested in the transient core feature of solr to manage a > large number of cores. I'm especially interested in this use case, that the > wiki lists at http://wiki.apache.org/solr/LotsOfCores (looks to be down > now): > >>loadOnStartup=false transient=true: This is really the use-case. There are > a large number of cores in your system that are short-duration use. You > want Solr to load them as necessary, but unload them when the cache gets > full on an LRU basis. > > I'm creating 10 transient core via core admin like so > > $ curl " > http://localhost:8983/solr/admin/cores?wt=json&action=CREATE&name=new_core2&instanceDir=collection1/&dataDir=new_core2&transient=true&loadOnStartup=false > " > > and have "transientCacheSize=2" in my solr.xml file, which I take means I > should have at most 2 transient cores loaded at any time. The problem is > that these cores are still loaded when when I ask solr to list cores: > > $ curl "http://localhost:8983/solr/admin/cores?wt=json&action=status"; > > From the explanation in the wiki, it looks like solr would manage loading > and unloading transient cores for me without having to worry about them, > but this is not what's happening. > > The situation is different when I restart solr; it does the "right thing" > by loading the maximum cores set by transientCacheSize. When I add more > cores, the old behavior happens again, where all created transient cores > are loaded in solr. > > I'm using the development branch lucene_solr_4_3 to run my example. I can > open a jira if need be.
