Analyse collateral effects of Exception being thrown during member sync

[abmargb]

2014-10-12 03:33:14 WARN RendezvousImpl:176 - Couldn't sync with neighbor rendezvous-heart.lsd.ufcg.edu.br
java.lang.NullPointerException
at org.fogbowcloud.rendezvous.xmpp.RendezvousPacketHelper.convertWhoIsAliveSyncResponse(RendezvousPacketHelper.java:35)
at org.fogbowcloud.rendezvous.xmpp.RendezvousPacketHelper.sendWhoIsAliveSyncIq(RendezvousPacketHelper.java:28)
at org.fogbowcloud.rendezvous.core.RendezvousImpl.syncNeighbors(RendezvousImpl.java:172)
at org.fogbowcloud.rendezvous.core.RendezvousImpl$2.run(RendezvousImpl.java:163)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)