Encountering a ClosedChannelException everytime I have 4 or more agents running though JNLP simultaneously

I have 4 agents named as crmtesta, crmtestb, crmtestc and crmtestd that use Windows JNLP as their connection. I trigger them through a single jenkins job simultaneously. Unfortunately, everytime I do this, some agents get terminated by jenkins. I tried to play around with the config -Dhudson.slaves.ChannelPinger.pingIntervalSeconds but still no luck.