[OAK-9165] Lucene: unique sync property index don't work properly

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.34.0
• Component/s: indexing, lucene, property-index
• Assignee: Thomas Mueller
• Reporter: Thomas Mueller
• Created: 07/Aug/20 13:54
• Updated: 10/Sep/20 15:45
• Resolved: 11/Aug/20 15:34

Description

Looks like Lucene already supports unique property indexes, by setting "sync" = true and "unique" = true on the indexed property.

But there is a bug: you can create a unique property index if there is a duplicate entry in the content. Reindexing succeeds. But then removing the duplicate entry in the content fails with:

I got the following exception

java.lang.NullPointerException: null
	at org.apache.jackrabbit.oak.plugins.index.property.strategy.UniqueEntryStoreStrategy.remove(UniqueEntryStoreStrategy.java:92) [org.apache.jackrabbit.oak-core:1.14.0.SNAPSHOT]
	at org.apache.jackrabbit.oak.plugins.index.property.strategy.UniqueEntryStoreStrategy.update(UniqueEntryStoreStrategy.java:78) [org.apache.jackrabbit.oak-core:1.14.0.SNAPSHOT]
	at org.apache.jackrabbit.oak.plugins.index.lucene.property.PropertyIndexUpdateCallback.propertyUpdated(PropertyIndexUpdateCallback.java:98) [org.apache.jackrabbit.oak-lucene:1.14.0.SNAPSHOT]
	at org.apache.jackrabbit.oak.plugins.index.search.CompositePropertyUpdateCallback.propertyUpdated(CompositePropertyUpdateCallback.java:46) [org.apache.jackrabbit.oak-lucene:1.14.0.SNAPSHOT]
	at org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndexEditor.propertyUpdated(LuceneIndexEditor.java:378) [org.apache.jackrabbit.oak-lucene:1.14.0.SNAPSHOT]

Issue Links

• relates to: OAK-6535 Synchronous Lucene Property Indexes