IllegalStateException: Unknown prefix {prefix}
----------------------------------------------
Key: STANBOL-519
URL: https://issues.apache.org/jira/browse/STANBOL-519
Project: Stanbol
Issue Type: Bug
Components: Entity Hub
Reporter: Rupert Westenthaler
Assignee: Rupert Westenthaler
The Entityhub thows an Exeption statnig that an prefix is not unknown by the
SolrYard.
org.apache.stanbol.enhancer.jobmanager.event.impl.EventJobManagerImpl
java.lang.IllegalStateException: Unknown prefix dbp-prop (parsed from field
dbp-prop:caption)!
at
org.apache.stanbol.entityhub.yard.solr.impl.SolrFieldMapper.getFullFieldName(SolrFieldMapper.java:611)
at
org.apache.stanbol.entityhub.yard.solr.impl.SolrFieldMapper.parseIndexField(SolrFieldMapper.java:289)
at
org.apache.stanbol.entityhub.yard.solr.impl.SolrFieldMapper.getField(SolrFieldMapper.java:179)
at
org.apache.stanbol.entityhub.yard.solr.impl.SolrYard.createRepresentation(SolrYard.java:894)
This can happen after a bigger version of an Index "{index-name}.solrindex.zip"
is copied to the "{stanbol-dir}/sling/datafiles" directory. Typically this
happens if Users try to upgrade from the defauld DBpedia index shiped with the
Stanbol launcher to a bigger one.
This is caused by the SolrYard caching the namespace prefixes used by the
SolrIndex. Such cached prefiexs are not correctly updated if the solr index is
upgrated. So if the new indexes uses additional prefixes the above Exeption is
thorwn.
Note: If the affected SolrYard is stopped than it will store the faulty
namespace prefix configuration to the SolrYard. This means that the Problem
will persist even after a restart.
To resolve the problem:
1. delete the data of the affected SolrCore (directory
{stanbol-dir}/sling/indexes/default/{{index-name}}
2. Restart stanbol. This will cause the SolrCore to be reinitialised based on
the "{index-name}.solrindex.zip" in the "{stanbol-dir}/sling/datafiles".
To workaround this problem:
1. shutdown Stanbol (or stop the SolrYard for the index you are about to
upgrade)
2. copy the "{index-name}.solrindex.zip" to "{stanbol-dir}/sling/datafiles"
3. restart Stanbol
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