[MNG-4542] StringSearchModelInterpolator concurrency problem Replaced WeakHashmap + synchronized with a ConcurrentHashMap. This was done after observing no change in memory profile after running all the IT's in the maven embedder with and without this patch. Discussed change with original author of code.
maven/maven-3/trunk/maven-model-builder/src/main/java/org/apache/maven/model/interpolation/StringSearchModelInterpolator.java