AlreadyClosedException on initial index creation
------------------------------------------------

                 Key: JCR-2413
                 URL: https://issues.apache.org/jira/browse/JCR-2413
             Project: Jackrabbit Content Repository
          Issue Type: Bug
          Components: jackrabbit-core
    Affects Versions: 2.0-beta3
            Reporter: Marcel Reutegger


Happens when the indexing queue is checked while creating an initial index. 
This is probably a regression caused by JCR-2035.

Caused by: org.apache.lucene.store.AlreadyClosedException: this Directory is 
closed
        at org.apache.lucene.store.Directory.ensureOpen(Directory.java:220)
        at org.apache.lucene.store.FSDirectory.getFile(FSDirectory.java:533)
        at 
org.apache.jackrabbit.core.query.lucene.directory.FSDirectoryManager$FSDir.list(FSDirectoryManager.java:149)
        at 
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:533)
        at 
org.apache.lucene.index.DirectoryIndexReader.open(DirectoryIndexReader.java:115)
        at org.apache.lucene.index.IndexReader.open(IndexReader.java:316)
        at org.apache.lucene.index.IndexReader.open(IndexReader.java:263)
        at 
org.apache.jackrabbit.core.query.lucene.AbstractIndex.getIndexReader(AbstractIndex.java:245)
        at 
org.apache.jackrabbit.core.query.lucene.AbstractIndex.removeDocument(AbstractIndex.java:225)
        at 
org.apache.jackrabbit.core.query.lucene.PersistentIndex.removeDocument(PersistentIndex.java:90)
        at 
org.apache.jackrabbit.core.query.lucene.MultiIndex$DeleteNode.execute(MultiIndex.java:1952)
        at 
org.apache.jackrabbit.core.query.lucene.MultiIndex.executeAndLog(MultiIndex.java:1085)
        at 
org.apache.jackrabbit.core.query.lucene.MultiIndex.checkIndexingQueue(MultiIndex.java:1308)
        at 
org.apache.jackrabbit.core.query.lucene.MultiIndex.createIndex(MultiIndex.java:1177)
        at 
org.apache.jackrabbit.core.query.lucene.MultiIndex.createIndex(MultiIndex.java:1191)
        at 
org.apache.jackrabbit.core.query.lucene.MultiIndex.createIndex(MultiIndex.java:1191)
        at 
org.apache.jackrabbit.core.query.lucene.MultiIndex.createIndex(MultiIndex.java:1191)
[...]

I assume there is an index merge happening at the same time that closes index 
segments.

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