Out of memory running ZK unit tests against trunk

[Patrick Hunt]

I've never seen this before, but in my CI environment (sun jdk
1.6.0_20) I'm seeing some intermittent failures such as the following.

Has anyone added/modified tests for 3.4.0 that might be using more
threads/memory than previously? Creating ZK clients but not closing
them, etc...

java.lang.OutOfMemoryError: unable to create new native thread
       at java.lang.Thread.start0(Native Method)
       at java.lang.Thread.start(Thread.java:597)
       at 
org.apache.zookeeper.server.NIOServerCnxnFactory.start(NIOServerCnxnFactory.java:114)
       at 
org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:406)
       at org.apache.zookeeper.test.QuorumBase.startServers(QuorumBase.java:186)
       at org.apache.zookeeper.test.QuorumBase.setUp(QuorumBase.java:103)
       at org.apache.zookeeper.test.QuorumBase.setUp(QuorumBase.java:67)
       at 
org.apache.zookeeper.test.QuorumZxidSyncTest.setUp(QuorumZxidSyncTest.java:39)

Patrick