Function lookup is not thread safe
----------------------------------
Key: GEOT-3481
URL: http://jira.codehaus.org/browse/GEOT-3481
Project: GeoTools
Issue Type: Bug
Components: core main
Affects Versions: 2.7-RC2
Reporter: Andrea Aime
Assignee: Andrea Aime
Fix For: 2.7.0
There are two errors in the current synchronization code:
- the class field is set to an empty collection before the collection could be
filled (large error, other threads will think the field is initialized, fix,
assign to the field only when the collection has been filled)
- it uses "double checked locking" which is known to have concurrency issues
(fix, use volatile, see
http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html)
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