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ConcurrentMap::compute default implementation bug results in NPE when invoked concurrently on NBHM

If I understand correctly, NonBlockingHashMap can be used as a drop-in replacement for ConcurrentHashMap. java.lang.NullPointerException at ...
GitHub

Override removeIf() and replaceAll() in our ConcurrentMap implementations #2382

ben-manes commented on Feb 21, 2016 replaceAll is another sneaky one. Surprisingly ConcurrentMap does not override Map 's default with an atomic version which uses entry.setValue(v). It has a JavaDoc ...