Error sending JSON request

#!
DEBUG: Error sending JSON request
java.net.MalformedURLException: For input string: "6874:7874"
        at java.net.URL.<init>(Unknown Source)
        at java.net.URL.<init>(Unknown Source)
        at java.net.URL.<init>(Unknown Source)
        at nxt.peer.Peer.send(Peer.java:583)
        at nxt.peer.Peer.connect(Peer.java:846)
        at nxt.peer.Peer.access$100(Peer.java:51)
        at nxt.peer.Peer$1.run(Peer.java:74)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRunAndReset(Unknown Source)

        at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.
access$301(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.
run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NumberFormatException: For input string: "6874:7874"
        at java.lang.NumberFormatException.forInputString(Unknown Source)
        at java.lang.Integer.parseInt(Unknown Source)
        at java.lang.Integer.parseInt(Unknown Source)
        at java.net.URLStreamHandler.parseURL(Unknown Source)
        ... 15 more
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