[SOLR-5247] Support for custom per core properties missing with new-style solr.xml

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 4.4
• Fix Version/s: 4.5, 6.0
• Component/s: multicore
• Labels: 4.4 core.properties discovery new-style property solr.xml
• Assignee: Erick Erickson
• Reporter: Chris F
• Created: 18/Sep/13 11:31
• Updated: 09/May/16 18:45
• Resolved: 13/Nov/13 00:11

Description

This part has been solved. See comments

When using old-style solr.xml I can define custom properties per core like so:

<cores adminPath="/admin/cores" defaultCoreName="core1">
  <core name="core1" instanceDir="core1" config="solrconfig.xml" schema="schema.xml">
    <property name="foo" value="bar" />
  </core>
</cores>

I can then use the property "foo" in schema.xml or solrconfig.xml like this:

<str name="foo">${foo}</str>

After switching to the new-style solr.xml with separate core.properties files per core this does not work anymore.

I guess the corresponding core.properties file should look like this:

config=solrconfig.xml
name=core1
schema=schema.xml
foo=bar

(I also tried property.foo=bar)

With that, I get the following error when reloading the core:

org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: No system property or default value specified for foo value:${foo}

I can successfully reload the core if I use ${foo:undefined} but the value of "foo" will always be "undefined" then.

When trying to create a new core with an url like this:

http://localhost:8080/solr/admin/cores?action=CREATE&name=core2&instanceDir=core2&config=solrconfig.xml&schema=schema.xml&property.foo=bar&persist=true

the property "foo" will not appear in core.properties. However, I can use it in schema.xml. But only until restarting the servlet container. After that, the property is lost.

Possibly related to SOLR-5208?