TaxonomyWriter parents array creation is not thread safe, can cause NPE
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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
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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