[OAK-4067] AssertionError thrown for Lucene index with empty suggest disctionary

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 1.4, 1.2.27
• Component/s: lucene
• Assignee: Tommaso Teofili
• Reporter: Chetan Mehrotra
• Created: 26/Feb/16 04:59
• Updated: 16/Feb/21 09:56
• Resolved: 26/Feb/16 09:19

Description

Create an index where one field is enabled for suggestion but no content is indexed for that index i.e. no matching content. Then while performing any query following exception is thrown

java.lang.AssertionError
	at org.apache.lucene.search.suggest.analyzing.AnalyzingInfixSuggester.<init>(AnalyzingInfixSuggester.java:167)
	at org.apache.jackrabbit.oak.plugins.index.lucene.util.SuggestHelper$2.<init>(SuggestHelper.java:127)
	at org.apache.jackrabbit.oak.plugins.index.lucene.util.SuggestHelper.getLookup(SuggestHelper.java:127)
	at org.apache.jackrabbit.oak.plugins.index.lucene.util.SuggestHelper.getLookup(SuggestHelper.java:123)
	at org.apache.jackrabbit.oak.plugins.index.lucene.IndexNode.<init>(IndexNode.java:109)
	at org.apache.jackrabbit.oak.plugins.index.lucene.IndexNode.open(IndexNode.java:69)
	at org.apache.jackrabbit.oak.plugins.index.lucene.IndexTracker.findIndexNode(IndexTracker.java:162)
	at org.apache.jackrabbit.oak.plugins.index.lucene.IndexTracker.acquireIndexNode(IndexTracker.java:137)
	at org.apache.jackrabbit.oak.plugins.index.lucene.LucenePropertyIndex.getPlans(LucenePropertyIndex.java:249)
	at org.apache.jackrabbit.oak.query.QueryImpl.getBestSelectorExecutionPlan(QueryImpl.java:1016)
	at org.apache.jackrabbit.oak.query.QueryImpl.getBestSelectorExecutionPlan(QueryImpl.java:949)
	at org.apache.jackrabbit.oak.query.ast.SelectorImpl.prepare(SelectorImpl.java:288)

This happens with -ea flag i.e. java assertions enabled. It caused here