Would be trivial to switch it to use the Netty 4 epoll implementation.
Now... To continue what I started hacking on ...
0 [main] INFO org.apache.zookeeper.server.ZooKeeperServer - Server environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT
...
39 [main] INFO org.apache.zookeeper.server.ZooKeeperServer - Created server with tickTime 3000 minSessionTimeout 6000 maxSessionTimeout 60000 datadir /var/folders/4l/kmd0x0_x0q587n81vrrfjks40000z9/T/org.xiphis.zookeeper.TestZookeeper/zksnap/version-2 snapdir /var/folders/4l/kmd0x0_x0q587n81vrrfjks40000z9/T/org.xiphis.zookeeper.TestZookeeper/zklog/version-2
54 [main] DEBUG io.netty.util.internal.logging.InternalLoggerFactory - Using SLF4J as the default logging framework
60 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.Buffer.address: available
61 [main] DEBUG io.netty.util.internal.PlatformDependent0 - sun.misc.Unsafe.theUnsafe: available
61 [main] DEBUG io.netty.util.internal.PlatformDependent0 - sun.misc.Unsafe.copyMemory: available
62 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.Bits.unaligned: true
64 [main] DEBUG io.netty.util.internal.PlatformDependent - Java version: 8
65 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.noUnsafe: false
65 [main] DEBUG io.netty.util.internal.PlatformDependent - sun.misc.Unsafe: available
66 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.noJavassist: false
68 [main] DEBUG io.netty.util.internal.PlatformDependent - Javassist: unavailable
68 [main] DEBUG io.netty.util.internal.PlatformDependent - You don't have Javassist in your class path or you don't have enough permission to load dynamically generated classes. Please check the configuration for better performance.
69 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.tmpdir: /var/folders/4l/kmd0x0_x0q587n81vrrfjks40000z9/T (java.io.tmpdir)
69 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.bitMode: 64 (sun.arch.data.model)
69 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.noPreferDirect: false
111 [main] DEBUG io.netty.channel.MultithreadEventLoopGroup - -Dio.netty.eventLoopThreads: 8
172 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.noKeySetOptimization: false
172 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.selectorAutoRebuildThreshold: 512
208 [main] INFO org.apache.zookeeper.server.Netty4ServerCnxnFactory - binding to port 0.0.0.0/0.0.0.0:62326
236 [main] DEBUG io.netty.util.internal.ThreadLocalRandom - -Dio.netty.initialSeedUniquifier: 0x1216b72d21d3cb0f (took 13 ms)
278 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.allocator.type: unpooled
278 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.threadLocalDirectBufferSize: 65536
282 [main] DEBUG io.netty.util.NetUtil - Loopback interface: lo0 (lo0, 0:0:0:0:0:0:0:1)
282 [main] DEBUG io.netty.util.NetUtil - /proc/sys/net/core/somaxconn: 128 (non-existent)
