com.jcraft.jsch.JSchException: session is down
   at com.jcraft.jsch.Channel.sendChannelOpen(Channel.java:762)
   at com.jcraft.jsch.Channel.connect(Channel.java:151)
   at org.netbeans.modules.nativeexecution.JschSupport$2.call(JschSupport.java:125)
   at org.netbeans.modules.nativeexecution.JschSupport$2.call(JschSupport.java:111)
   at org.netbeans.modules.nativeexecution.JschSupport.start(JschSupport.java:143)
   at org.netbeans.modules.nativeexecution.JschSupport.startLoginShellSession(JschSupport.java:135)
   at org.netbeans.modules.nativeexecution.support.hostinfo.impl.UnixHostInfoProvider.getRemoteUserEnvironment(UnixHostInfoProvider.java:299)
   at org.netbeans.modules.nativeexecution.support.hostinfo.impl.UnixHostInfoProvider.getHostInfo(UnixHostInfoProvider.java:118)
   at org.netbeans.modules.nativeexecution.support.hostinfo.FetchHostInfoTask.compute(FetchHostInfoTask.java:64)
   at org.netbeans.modules.nativeexecution.api.util.HostInfoUtils.getHostInfo(HostInfoUtils.java:283)
   at org.netbeans.modules.nativeexecution.api.util.ConnectionManager.initiateConnection(ConnectionManager.java:452)
   at org.netbeans.modules.nativeexecution.api.util.ConnectionManager.connectTo(ConnectionManager.java:376)
   at org.netbeans.modules.cnd.makeproject.ConnectionHelper$1.run(ConnectionHelper.java:100)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1425)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:59)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:294)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2038)