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https://issues.apache.org/jira/browse/LUCENE-3484?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Doron Cohen resolved LUCENE-3484.
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Resolution: Fixed
Fix Version/s: 4.0
3.5
Fixed:
- r1178923, r1178936 - trunk
- r1178931 - 3x
> TaxonomyWriter parents array creation is not thread safe, can cause NPE
> -----------------------------------------------------------------------
>
> Key: LUCENE-3484
> URL: https://issues.apache.org/jira/browse/LUCENE-3484
> Project: Lucene - Java
> Issue Type: Bug
> Components: modules/facet
> Reporter: Doron Cohen
> Assignee: Doron Cohen
> Fix For: 3.5, 4.0
>
> Attachments: LUCENE-3484.patch
>
>
> Following user list thread [TaxWriter leakage? |
> http://markmail.org/thread/jkkhemfzpnbdzoft] it appears that if two threads
> or more are asking for the parent array for the first time, a context switch
> after the first thread created the empty parents array but before it
> initialized it would cause the other array to use an uninitialized array,
> causing an NPE. Fix is simple: synchronize the method getParentArray()
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