I am getting following error while sending push notification using pushy library -- Caused by: io.netty.channel.AbstractChannel$AnnotatedSocketException: Network is unreachable: api.sandbox.push.apple.com/2620:149:208:305:0:0:0:1f:443 Caused by: java.net.SocketException: Network is unreachable at sun.nio.ch.Net.connect0(Native Method) at sun.nio.ch.Net.connect(Net.java:454) at sun.nio.ch.Net.connect(Net.java:446) at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648) at io.netty.util.internal.SocketUtils$3.run(SocketUtils.java:83) at io.netty.util.internal.SocketUtils$3.run(SocketUtils.java:80) at java.security.AccessController.doPrivileged(Native Method) at io.netty.util.internal.SocketUtils.connect(SocketUtils.java:80) at io.netty.channel.socket.nio.NioSocketChannel.doConnect(NioSocketChannel.java:315) at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.connect(AbstractNioChannel.java:248) at io.netty.channel.DefaultChannelPipeline$HeadContext.connect(DefaultChannelPipeline.java:1354) at io.netty.channel.AbstractChannelHandlerContext.invokeConnect(AbstractChannelHandlerContext.java:547)I am getting following error while sending push notification using pushy library -- Caused by: io.netty.channel.AbstractChannel$AnnotatedSocketException: Network is unreachable: api.sandbox.push.apple.com/2620:149:208:305:0:0:0:1f:443 Caused by: java.net.SocketException: Network is unreachable at sun.nio.ch.Net.connect0(Native Method) at sun.nio.ch.Net.connect(Net.java:454) at sun.nio.ch.Net.connect(Net.java:446) at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648) at io.netty.util.internal.SocketUtils$3.run(SocketUtils.java:83) at io.netty.util.internal.SocketUtils$3.run(SocketUtils.java:80) at java.security.AccessController.doPrivileged(Native Method) at io.netty.util.internal.SocketUtils.connect(SocketUtils.java:80) at io.netty.channel.socket.nio.NioSocketChannel.doConnect(NioSocketChannel.java:315) at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.connect(AbstractNioChannel.java:248) at io.netty.channel.DefaultChannelPipeline$HeadContext.connect(DefaultChannelPipeline.java:1354) at io.netty.channel.AbstractChannelHandlerContext.invokeConnect(AbstractChannelHandlerContext.java:547) Multiline BlockQuote