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java.net.UnknownHostException: D	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:177)	at java.net.Socket.connect(Socket.java:520)	at java.net.Socket.connect(Socket.java:470)	at sun.net.NetworkClient.doConnect(NetworkClient.java:157)	at sun.net.NetworkClient.openServer(NetworkClient.java:118)	at sun.net.ftp.FtpClient.openServer(FtpClient.java:488)	at sun.net.ftp.FtpClient.openServer(FtpClient.java:475)	at sun.net.www.protocol.ftp.FtpURLConnection.connect(FtpURLConnection.java:270)	at sun.net.www.protocol.ftp.FtpURLConnection.getInputStream(FtpURLConnection.java:352)	at net.sf.json.groovy.JsonSlurper.parse(JsonSlurper.java:55)	at net.sf.json.groovy.JsonSlurper.parse(JsonSlurper.java:63)	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:230)	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:912)	at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:946)	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:756)	at org.codehaus.groovy.runtime.InvokerHelper.invokePogoMethod(InvokerHelper.java:778)	at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:758)	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:170)	at net.sf.json.groovy.TestJsonSlurper.testParseUri(TestJsonSlurper.groovy:58)