Hoss Man created SOLR-5262:
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Summary: implicit solr.core.* properties should always be
available, regardless of wether underlying core.property is specified
Key: SOLR-5262
URL: https://issues.apache.org/jira/browse/SOLR-5262
Project: Solr
Issue Type: Bug
Reporter: Hoss Man
reviewing the docs for core.properties and implicit property substitution, i
noticed what seems to be a bug in how implicit properties are made available
for config files.
if you look at CoreDescriptor.buildSubstitutableProperties, the logic only
loops over the names found in "coreProperties" -- meaning that if a user
doesn't explicitly set one of the "standard" properties there, then the
corrisponding "solr.core.propname" implicit value (with the default value) will
not be available.
the point of the implicit properties is that they should *always* be available
for use in configs, even if the value comes from the hardcoded default, or is
derived from something else.
(ie: if you put this in the example solrconfig.xml...
{noformat}
<lst name="defaults">
<str name="echoParams">all</str>
<int name="rows">10</int>
<str name="df">text</str>
<str name="hoss">${solr.core.ulogDir}</str>
</lst>
{noformat}
...solr will fail to start up, unless you also add an explicit "ulogDir=tlog"
to the core.properties file -- but this should work w/o the user explicitly
configuring the ulogDir property
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