Unable to create new native thread when running core/ testsuite

Test suite progress: tests succeeded: 1695, failed: 4, skipped: 0.
Exception in thread "ConnectionMap.Acceptor,null,null" java.lang.OutOfMemoryError: unable to create new native thread
	at java.lang.Thread.start0(Native Method)
	at java.lang.Thread.start(Thread.java:658)
	at org.jgroups.blocks.TCPConnectionMap$TCPConnection$ConnectionPeerReceiver.start(TCPConnectionMap.java:568)
	at org.jgroups.blocks.TCPConnectionMap$TCPConnection.start(TCPConnectionMap.java:411)
	at org.jgroups.blocks.TCPConnectionMap$TCPConnection.access$600(TCPConnectionMap.java:354)
	at org.jgroups.blocks.TCPConnectionMap$ConnectionAcceptor.run(TCPConnectionMap.java:259)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "ConnectionMap.Acceptor,null,null" java.lang.OutOfMemoryError: unable to create new native thread
	at java.lang.Thread.start0(Native Method)
	at java.lang.Thread.start(Thread.java:658)
	at org.jgroups.blocks.TCPConnectionMap$TCPConnection$ConnectionPeerReceiver.start(TCPConnectionMap.java:568)
	at org.jgroups.blocks.TCPConnectionMap$TCPConnection.start(TCPConnectionMap.java:411)
	at org.jgroups.blocks.TCPConnectionMap$TCPConnection.access$600(TCPConnectionMap.java:354)
	at org.jgroups.blocks.TCPConnectionMap$ConnectionAcceptor.run(TCPConnectionMap.java:259)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "ConnectionMap.Acceptor,null,null" java.lang.OutOfMemoryError: unable to create new native thread
	at java.lang.Thread.start0(Native Method)
	at java.lang.Thread.start(Thread.java:658)
	at org.jgroups.blocks.TCPConnectionMap$TCPConnection$ConnectionPeerReceiver.start(TCPConnectionMap.java:568)
	at org.jgroups.blocks.TCPConnectionMap$TCPConnection.start(TCPConnectionMap.java:411)
	at org.jgroups.blocks.TCPConnectionMap$TCPConnection.access$600(TCPConnectionMap.java:354)
	at org.jgroups.blocks.TCPConnectionMap$ConnectionAcceptor.run(TCPConnectionMap.java:259)
	at java.lang.Thread.run(Thread.java:680)
[testng-TopologyAwareDistAsyncFuncTest] Test testPutIfAbsentFromNonOwner(org.infinispan.distribution.topologyaware.TopologyAwareDistAsyncFuncTest) succeeded.
Test suite progress: tests succeeded: 1696, failed: 4, skipped: 0.
[testng-TopologyAwareDistAsyncFuncTest] Test testRemoveFromNonOwner(org.infinispan.distribution.topologyaware.TopologyAwareDistAsyncFuncTest) succeeded.
Test suite progress: tests succeeded: 1697, failed: 4, skipped: 0.
[testng-TopologyAwareDistAsyncFuncTest] Test testReplaceFromNonOwner(org.infinispan.distribution.topologyaware.TopologyAwareDistAsyncFuncTest) succeeded.
Test suite progress: tests succeeded: 1698, failed: 4, skipped: 0.
Exception in thread "CacheViewTrigger,TopologyAwareDistAsyncFuncTest-NodeA-38647" java.lang.OutOfMemoryError: unable to create new native thread
	at java.lang.Thread.start0(Native Method)
	at java.lang.Thread.start(Thread.java:658)
	at java.util.concurrent.ThreadPoolExecutor.addIfUnderMaximumPoolSize(ThreadPoolExecutor.java:727)
	at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:657)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:92)
	at org.infinispan.cacheviews.CacheViewsManagerImpl$ViewTriggerThread.run(CacheViewsManagerImpl.java:848)