[JCR-2242] Unsynchronized access to MultiIndex#indexes

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.6
• Component/s: jackrabbit-core
• Assignee: Unassigned
• Reporter: Marcel Reutegger
• Created: 05/Aug/09 14:20
• Updated: 13/Aug/09 15:03
• Resolved: 05/Aug/09 14:37

Description

This may result in a concurrent modification exception:

java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at org.apache.jackrabbit.core.query.lucene.MultiIndex.getIndexReader(MultiIndex.java:744)
at org.apache.jackrabbit.core.query.lucene.MultiIndex.getIndexReader(MultiIndex.java:712)
at org.apache.jackrabbit.core.query.lucene.SearchIndex.getIndexReader(SearchIndex.java:1024)
at org.apache.jackrabbit.core.query.lucene.SearchIndex.executeQuery(SearchIndex.java:820)
at org.apache.jackrabbit.core.query.lucene.SingleColumnQueryResult.executeQuery(SingleColumnQueryResult.java:78)
at org.apache.jackrabbit.core.query.lucene.QueryResultImpl.getResults(QueryResultImpl.java:293)
at org.apache.jackrabbit.core.query.lucene.SingleColumnQueryResult.<init>(SingleColumnQueryResult.java:70)
at org.apache.jackrabbit.core.query.lucene.QueryImpl.execute(QueryImpl.java:132)
at org.apache.jackrabbit.core.query.QueryImpl.execute(QueryImpl.java:127)

This is usually very unlikely but with the recent changes to our tests, index flushes are very frequent and may cause the above exception.