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https://issues.apache.org/jira/browse/SOLR-6326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14162386#comment-14162386
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Peter Keegan commented on SOLR-6326:
------------------------------------
After revisiting this issue again, I noticed that the EFF reload was occuring
in Solr 4.6 on a newSearcher listener, but not in 4.9, because of this change
to SolrCore.openNewSearcher:
if (newReader == null) { // the underlying index has not changed at all
if (realtime) {
// if this is a request for a realtime searcher, just return the
same searcher
newestSearcher.incref();
return newestSearcher;
} else if (newestSearcher.get().isCachingEnabled() &&
newestSearcher.get().getSchema() == getLatestSchema()) {
// absolutely nothing has changed, can use the same searcher
// but log a message about it to minimize confusion
newestSearcher.incref();
log.info("SolrIndexSearcher has not changed - not re-opening: " +
newestSearcher.get().getName());
return newestSearcher;
} // ELSE: open a new searcher against the old reader...
currentReader.incRef();
newReader = currentReader;
}
So maybe this needs to be modified to check to see if there are any new EFF
files to load?
> ExternalFileFieldReloader and commits
> -------------------------------------
>
> Key: SOLR-6326
> URL: https://issues.apache.org/jira/browse/SOLR-6326
> Project: Solr
> Issue Type: Bug
> Reporter: Peter Keegan
> Labels: difficulty-medium, externalfilefield, impact-medium
>
> When there are multiple 'external file field' files available, Solr will
> reload the last one (lexicographically) with a commit, but only if changes
> were made to the index. Otherwise, it skips the reload and logs: "No
> uncommitted changes. Skipping IW.commit."
> IndexWriter.hasUncommittedChanges() returns false, but new external files
> should be reloaded with commits.
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