ResizableDoubleArray is not thread-safe yet has some synch. methods
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Key: MATH-757
URL: https://issues.apache.org/jira/browse/MATH-757
Project: Commons Math
Issue Type: Bug
Reporter: Sebb
ResizableDoubleArray has several synchronised methods, but is not thread-safe,
because class variables are not always accessed using the lock.
Is the class supposed to be thread-safe?
If so, all accesses (read and write) need to be synch.
If not, the synch. qualifiers could be dropped.
In any case, the protected fields need to be made private.
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