Java Heap Space - MultiMaster

We are receiving the following errors on both of our DS Instances. They are configured in a multimaster topology. I have increased the heap size as seen below in the wrapper.conf. Increasing the memory prolongs when the instance needs to be restarted, but does not resolve.

INFO | jvm 1 | 2015/09/12 23:43:34 | Exception in thread "pool-2-thread-3" java.lang.OutOfMemoryError: Java heap space
INFO | jvm 1 | 2015/09/12 23:43:42 | Exception in thread "pool-2-thread-6" java.lang.OutOfMemoryError: Java heap space
INFO | jvm 1 | 2015/09/12 23:43:49 | Exception in thread "pool-2-thread-7" java.lang.OutOfMemoryError: Java heap space
INFO | jvm 1 | 2015/09/12 23:43:57 | Exception in thread "pool-2-thread-8" java.lang.OutOfMemoryError: Java heap space
INFO | jvm 1 | 2015/09/12 23:44:48 | Exception in thread "pool-3-thread-1"
INFO | jvm 1 | 2015/09/12 23:44:52 | java.lang.OutOfMemoryError: Java heap space

1. Initial Java Heap Size (in MB)
   #wrapper.java.initmemory=1024

1. Maximum Java Heap Size (in MB)
   #wrapper.java.maxmemory=2048