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Date: Thu, 28 Aug 2008 18:12:48 +0530 (IST)
From: Nikhil Chhaochharia <nikhil500@yahoo.com>
Subject: Re: CoreDescriptor explanation and possible bug
To: solr-user@lucene.apache.org
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I went through the javadocs for the CoreContainer and CoreDescriptor classe=
s (20th-Aug nightly, the latest I could find).  The steps for creating a So=
lrCore now appear to be:  (Note for the benefit of those who might stumble =
upon this through a websearch - this is not a HOWTO but my best guess which=
 may not be correct)=0A=0A1.  CoreContainer.Initializer.setSolrConfigFilena=
me("path/solrconfig.xml")=0A2.  cc =3D CoreContainer.Initializer.initialize=
()=0A3.  cd =3D new CoreDescriptor(cc, "core01", "path/solrHome/for/core01"=
)=0A4.  SolrCore sc =3D cc.create(cd)=0A=0AIs this correct?=0A=0A=0ATo spec=
ify my problem in another way, I have a solrconfig.xml but no schema.xml.  =
I create a IndexSchema object at runtime.  I want to now get a SolrCore obj=
ect.=0A=0AThanks,=0ANikhil=0A=0A=0A=0A=0A=0A----- Original Message ----=0AF=
rom: Henrib <hbiestro@gmail.com>=0ATo: solr-user@lucene.apache.org=0ASent: =
Thursday, 28 August, 2008 5:23:48 PM=0ASubject: Re: CoreDescriptor explanat=
ion and possible bug=0A=0A=0AHi,=0AIt is likely to be related to how you in=
itialize Solr & create your=0ASolrCore; there has been a few changes to ens=
ure there is always a=0ACoreContainer created which (as its name stands), h=
olds a reference to all=0Acreated SolrCore.=0AThere is a CoreContainer.Init=
ializer class that allows to easily create that=0ACoreContainer (even if yo=
u don't have a solr.xml).=0AHope this helps,=0AHenri=0A=0A=0A=0ANikhil Chha=
ochharia wrote:=0A> =0A> Hi,=0A> =0A> I have been using nightly builds of S=
olr 1.3 with SolrJ for some time now. =0A> I upgraded the Solr jars from th=
e 14-Aug nightly and my program would not=0A> compile.  I found that SolrCo=
re constructor needed a new parameter=0A> CoreDescriptor.  I passed null an=
d it worked fine.=0A> =0A> I then upgraded to the Solr jars from the 20th-A=
ug nightly and it started=0A> throwing NullPointerExceptions.  My guess is =
that the addition of the=0A> method SolrCore.getStatistics() which has the =
line "lst.add("aliases",=0A> getCoreDescriptor().getCoreContainer().getCore=
Names(this));" throws the=0A> NPE.=0A> =0A> I searched the wiki and there i=
s no mention of CoreDescriptor there. =0A> Could somebody please explain wh=
at CoreDescriptor is all about and how it=0A> is supposed to be used?=0A> =
=0A> Thanks,=0A> Nikhil=0A> =0A> =0A> =0A=0A-- =0AView this message in cont=
ext: http://www.nabble.com/CoreDescriptor-explanation-and-possible-bug-tp19=
197004p19198965.html=0ASent from the Solr - User mailing list archive at Na=
bble.com.