I get the error message "Error occured while activating indexes: com.atlassian.jira.issue.index.IndexException: java.util.concurrent.ExecutionException: com.atlassian.util.concurrent.LazyReference$InitializationException: com.atlassian.jira.util.RuntimeIOException: java.io.FileNotFoundException: no segments* file found in org.apache.lucene.store.FSDirectory@/private/tmp/trunk/index/issues: files:" after a reindex that appears to complete successfuly. Maybe the result of the last index failure is being remebered by the LazyReference.

Steps:

1. Stop jira.
2. Delete the JIRA index directory.
3. Restart JIRA.
4. Goto the Dashboard.
5. Reindex JIRA. The error will probably display.