Currently in the HotRod client the SSLContext is created with the hardcoded "TLS" protocol. This prevents java 7 clients to make usage of TLS 1.2, since it is not enabled by default and needs "TLSv1.2" protocol setting to force it.


The client is running Java7 (JDG6.6) and the server is JDG7.
From the server log the connection fail with different messages, the reported version differ any time:
ERROR [org.infinispan.server.hotrod.CacheDecodeContext] (HotRodServerWorker-4-2) ISPN005003: Exception reported: org.infinispan.server.hotrod.UnknownVersionException: Unknown version:-96
	at org.infinispan.server.hotrod.HotRodDecoder.readHeader(HotRodDecoder.java:199)
	at org.infinispan.server.hotrod.HotRodDecoder.decodeHeader(HotRodDecoder.java:129)
	at org.infinispan.server.hotrod.HotRodDecoder.decode(HotRodDecoder.java:87)
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:387)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:245)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:292)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:278)
	at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1070)
	at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:904)
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:387)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:245)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:292)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:278)
	at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
	at org.infinispan.server.core.transport.StatsChannelHandler.channelRead(StatsChannelHandler.java:30)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:292)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:278)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:962)
	at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:879)
	at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:360)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:276)
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)
	at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
	at java.lang.Thread.run(Thread.java:745)


The client shows connection failures:
----------------------------------------
RemoteCacheManager [INFO] ISPN004021: Infinispan version: 6.4.0-redhat-SNAPSHOT
2016-07-18 13:11:30 TcpTransportFactory [DEBUG] Statically configured servers: [/192.168.1.1:11222]
TcpTransportFactory [DEBUG] Load balancer class: org.infinispan.client.hotrod.impl.transport.tcp.RoundRobinBalancingStrategy
TcpTransportFactory [DEBUG] Tcp no delay = true; client socket timeout = 60000 ms; connect timeout = 60000 ms
RoundRobinBalancingStrategy [TRACE] New server list is: [/192.168.1.1:11222]
2016-07-18 13:11:31 TcpTransport [TRACE] Could not connect to server: /192.168.1.1:11222
java.net.ConnectException: Connection refused: connect
	at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:579)
	at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:618)
	at org.infinispan.client.hotrod.impl.transport.tcp.TcpTransport.<init>(TcpTransport.java:66)
	at org.infinispan.client.hotrod.impl.transport.tcp.SaslTransportObjectFactory.makeObject(SaslTransportObjectFactory.java:47)
	at org.infinispan.client.hotrod.impl.transport.tcp.SaslTransportObjectFactory.makeObject(SaslTransportObjectFactory.java:31)
	at org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:1220)
	at org.infinispan.client.hotrod.impl.transport.tcp.TcpTransportFactory.pingServersIgnoreException(TcpTransportFactory.java:179)
	at org.infinispan.client.hotrod.impl.transport.tcp.TcpTransportFactory.start(TcpTransportFactory.java:157)
	at org.infinispan.client.hotrod.RemoteCacheManager.start(RemoteCacheManager.java:529)
	at org.infinispan.client.hotrod.RemoteCacheManager.<init>(RemoteCacheManager.java:183)
	at org.infinispan.jcache.remote.JCacheManager.<init>(JCacheManager.java:44)
	at org.infinispan.jcache.remote.JCachingProvider.createCacheManager(JCachingProvider.java:35)
	at org.infinispan.jcache.AbstractJCachingProvider.getCacheManager(AbstractJCachingProvider.java:67)
	at org.infinispan.jcache.AbstractJCachingProvider.getCacheManager(AbstractJCachingProvider.java:80)
	at org.infinispan.jcache.AbstractJCachingProvider.getCacheManager(AbstractJCachingProvider.java:95)
	at mkes.test.distcaches.performance.test.RemoteJCacheTesterFlatsts.main(RemoteJCacheTesterFlatsts.java:32)


Version-Release number of selected component (if applicable):
HotRod Client : JDG 6.6
JDG server    : JDG 7.0.0

How reproducible:
Client is JDG6 run with Java7 or Java6
Server run with Java8