GemFire tests fail intermittently with "java.lang.RuntimeException: could not fork cache server"

java.lang.RuntimeException: could not fork cache server
	at org.springframework.integration.gemfire.fork.ForkUtil.startCacheServer(ForkUtil.java:155)
	at org.springframework.integration.gemfire.fork.ForkUtil.cacheServer(ForkUtil.java:127)
	at org.springframework.integration.gemfire.inbound.CqInboundChannelAdapterTests.startUp(CqInboundChannelAdapterTests.java:74)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

[FORK] Exception in thread "main" com.gemstone.gemfire.IncompatibleSystemException: Member bamboo-07(CacheServer:17649)<v12>:53948 could not join this distributed system because the existing member 10.194.6.19(CacheServer:25944)<v0>:8517 used the same name. Set the "name" gemfire property to a unique value.
[FORK] at com.gemstone.gemfire.distributed.internal.DistributionManager.create(DistributionManager.java:626)
[FORK] at com.gemstone.gemfire.distributed.internal.InternalDistributedSystem.initialize(InternalDistributedSystem.java:620)
[FORK] at com.gemstone.gemfire.distributed.internal.InternalDistributedSystem.newInstance(InternalDistributedSystem.java:281)
[FORK] at com.gemstone.gemfire.distributed.DistributedSystem.connect(DistributedSystem.java:1651) 
[FORK] at com.gemstone.gemfire.cache.CacheFactory.create(CacheFactory.java:227) 
[FORK] at org.springframework.integration.gemfire.fork.CacheServerProcess.main(CacheServerProcess.java:59)