Gateway not closing connections on node

JBossFuse:admin@root> container-list
[id]        [version]  [type]  [connected]  [profiles]              [provision status]
server1  1.0        karaf   yes          fabric                  success     
                                            profile1                         
server2  1.0        karaf   yes          fabric                  success     
                                            profile2                         
root*       1.0        karaf   yes          fabric                  success     
                                            fabric-ensemble-0000-1              
                                            jboss-fuse-full                     
  balancer  1.0        karaf   yes          default                 success     
                                            gateway-http                        
                                            gateway-mq

2019-09-20 01:11:51,097 | WARN  | entloop-thread-0 | DefaultChannelPipeline           | 146 - io.netty.common - 4.0.37.Final-redhat-2 | An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
java.io.IOException: Too many open files
	at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)[:1.8.0_161]
	at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)[:1.8.0_161]
	at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)[:1.8.0_161]
	at io.netty.channel.socket.nio.NioServerSocketChannel.doReadMessages(NioServerSocketChannel.java:135)[148:io.netty.transport:4.0.37.Final-redhat-2]
	at io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:69)[148:io.netty.transport:4.0.37.Final-redhat-2]
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:564)[148:io.netty.transport:4.0.37.Final-redhat-2]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:505)[148:io.netty.transport:4.0.37.Final-redhat-2]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:419)[148:io.netty.transport:4.0.37.Final-redhat-2]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:391)[148:io.netty.transport:4.0.37.Final-redhat-2]
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)[146:io.netty.common:4.0.37.Final-redhat-2]
	at java.lang.Thread.run(Thread.java:748)[:1.8.0_161]
2019-09-20 01:11:51,099 | INFO  | entloop-thread-0 | HttpGatewayHandler               | 139 - io.fabric8.gateway-core - 1.2.0.redhat-630187 | Proxying request /cxf/example/api/test/ping/1 to service path: /cxf/example/api/test/ping/1/ on service: http://server2:8181/cxf/example reverseServiceUrl: http://0.0.0.0:8060/cxf/example
2019-09-20 01:11:51,101 | ERROR | entloop-thread-0 | DefaultContext                   | 138 - io.fabric8.fabric-vertx - 1.2.0.redhat-630187 | Unhandled exception
io.netty.channel.ChannelException: Unable to create Channel from class class io.netty.channel.socket.nio.NioSocketChannel
	at io.netty.bootstrap.AbstractBootstrap$BootstrapChannelFactory.newChannel(AbstractBootstrap.java:457)[148:io.netty.transport:4.0.37.Final-redhat-2]
	at io.netty.bootstrap.AbstractBootstrap.initAndRegister(AbstractBootstrap.java:308)[148:io.netty.transport:4.0.37.Final-redhat-2]
	at io.netty.bootstrap.Bootstrap.doConnect(Bootstrap.java:135)[148:io.netty.transport:4.0.37.Final-redhat-2]

$ cat lsof_output.txt | grep -i 'balancerIP:8060'| wc -l
 2855703