firstSearcher Listener of SpellChecker can be never called
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Key: SOLR-2425
URL: https://issues.apache.org/jira/browse/SOLR-2425
Project: Solr
Issue Type: Bug
Components: spellchecker
Affects Versions: 1.4.1, 3.1, 4.0
Reporter: Koji Sekiguchi
Priority: Minor
mail thread:
http://www.lucidimagination.com/search/document/65e73468958faf09/known_problem_firstsearcher_event_of_spellchecker_is_never_called
firstSearcher Listener of SpellChecker is never called when there is no
<listener event="firstSearcher"/> registered in solrconfig.xml.
The reason is because the sequence of procedures in SolrCore constructor:
# initListeners();
# getSearcher(false,false,null); => register (general) firstSearcher listener
if it exists
# call SolrCoreAware.inform(); => register SpellChecker's firstSearcher listener
After that, Callable.call() is called to execute the firstSearcher event:
{code}
if (currSearcher==null && firstSearcherListeners.size() > 0) {
future = searcherExecutor.submit(
new Callable() {
public Object call() throws Exception {
try {
for (SolrEventListener listener : firstSearcherListeners) {
listener.newSearcher(newSearcher,null);
}
} catch (Throwable e) {
SolrException.logOnce(log,null,e);
}
return null;
}
}
);
}
{code}
At the time, firstSearcherListeners includes SpellChecker's
firstSearcherListner, registered by procedure 3 above. But if you have no
<listener event="firstSearcher"/> registered in solrconfig.xml, at the
procedure 2, searcherExecutor.submit() is never called because
firstSearcherListeners.size() is zero at the moment.
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