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    Type:Bug 
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    Resolution: Done
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    Priority:Major - P3 
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    Affects Version/s: 1.7.0
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    Component/s: None
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There are some thread safety issues in 1.7.0, as brought to our attention by a customer in CS-4305 - ReplicaSet connection pool error in multi-threaded use case using Jruby 1.6.3. While we have defined several Mutexes, we no longer use them.