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https://issues.apache.org/jira/browse/SOLR-6845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14250350#comment-14250350
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Tomás Fernández Löbbe commented on SOLR-6845:
---------------------------------------------
Trying to add some unit tests to this feature I found another issue.
SuggestComponent and SpellcheckComponent rely on a {{firstSearcherListener}} to
load (and in this case, also build) some structures. These
firstSearcherListeners are registered on {{SolrCoreAware.inform()}}, however
the first searcher listener task is only added to the queue of warming tasks if
there is at least one listener registered at the time of the first searcher
creation (before SolrCoreAware.inform() is ever called). See
{code:title=SolrCore.java}
if (currSearcher == null && firstSearcherListeners.size() > 0) {
future = searcherExecutor.submit(new Callable() {
@Override
public Object call() throws Exception {
try {
for (SolrEventListener listener : firstSearcherListeners) {
listener.newSearcher(newSearcher, null);
}
} catch (Throwable e) {
SolrException.log(log, null, e);
if (e instanceof Error) {
throw (Error) e;
}
}
return null;
}
});
}
{code}
I'll create a new Jira for this
> figure out why suggester causes slow startup - even when not used
> -----------------------------------------------------------------
>
> Key: SOLR-6845
> URL: https://issues.apache.org/jira/browse/SOLR-6845
> Project: Solr
> Issue Type: Bug
> Reporter: Hoss Man
>
> SOLR-6679 was filed to track the investigation into the following problem...
> {panel}
> The stock solrconfig provides a bad experience with a large index... start up
> Solr and it will spin at 100% CPU for minutes, unresponsive, while it
> apparently builds a suggester index.
> ...
> This is what I did:
> 1) indexed 10M very small docs (only takes a few minutes).
> 2) shut down Solr
> 3) start up Solr and watch it be unresponsive for over 4 minutes!
> I didn't even use any of the fields specified in the suggester config and I
> never called the suggest request handler.
> {panel}
> ..but ultimately focused on removing/disabling the suggester from the sample
> configs.
> Opening this new issue to focus on actually trying to identify the root
> problem & fix it.
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