java.net.SocketException: Connection reset

[Aaron Mathias]

I get this error often when I am trying to write to an output stream within my companys network. Outside the network the code works fine:

java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:168)
at com.sun.net.ssl.internal.ssl.InputRecord.readFully(InputRecord.java:293)
at com.sun.net.ssl.internal.ssl.InputRecord.read(InputRecord.java:331)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:798)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1138)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:632)
at com.sun.net.ssl.internal.ssl.AppOutputStream.write(AppOutputStream.java:59)
at java.io.OutputStream.write(OutputStream.java:58)
at javapns.notification.PushNotificationManager.sendNotification(PushNotificationManager.java:404)
at javapns.notification.PushNotificationManager.sendNotification(PushNotificationManager.java:352)
at javapns.notification.PushNotificationManager.sendNotification(PushNotificationManager.java:322)
at javapns.Push.sendPayload(Push.java:176)
at javapns.Push.alert(Push.java:47)
at com.mycompany.mobile.APNSCommunicator.sendAPNSNotification(APNSCommunicator.java:101)
at com.mycompany.mobile.APNSCommunicator.main(APNSCommunicator.java:72)

My systems guys are telling me its not a firewall issue, as they have opened the appropriate ports in the past for this service and everything was working.

What should I investigate? From what I have read online it seems that either the host is closing the connection or we are closing the connection.