@Override
      public void run() {
        Region region1 = basicGetCache().getRegion(CustomerPartitionedRegionName);
        for (int i = 0; i < 50; i++) {
          region1.put(i, "A");
        }
      }
Test for hang condition observed with the PRHARedundancyProvider.createMissingBuckets code.

A parent region is populated with buckets. Then the child region is created simultaneously on
several nodes.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRColocationDUnitTest.java