为什么会出现这个错误？任何的想法？
[2013-10-30 12:09:07 - ddms] null
java.lang.NullPointerException
at com.android.ddmlib.Client.read(Client.java:698)
at com.android.ddmlib.MonitorThread.processClientActivity(MonitorThread.java:311)
at com.android.ddmlib.MonitorThread.run(MonitorThread.java:263)
[2013-10-30 12:09:07 - ddms] null
java.lang.NullPointerException
at com.android.ddmlib.Client.read(Client.java:698)
at com.android.ddmlib.MonitorThread.processClientActivity(MonitorThread.java:311)
at com.android.ddmlib.MonitorThread.run(MonitorThread.java:263)
[2013-10-30 12:09:46 - ddms] Can't bind to local 8602 for debugger
[2013-10-30 12:09:47 - ddmlib] An established connection was aborted by the software in your host machine
java.io.IOException: An established connection was aborted by the software in your host machine
at sun.nio.ch.SocketDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:51)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:94)
at sun.nio.ch.IOUtil.write(IOUtil.java:65)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:466)
at com.android.ddmlib.JdwpPacket.writeAndConsume(JdwpPacket.java:213)
at com.android.ddmlib.Client.sendAndConsume(Client.java:642)
at com.android.ddmlib.HandleHeap.sendREAQ(HandleHeap.java:348)
at com.android.ddmlib.Client.requestAllocationStatus(Client.java:488)
at com.android.ddmlib.DeviceMonitor.createClient(DeviceMonitor.java:835)
at com.android.ddmlib.DeviceMonitor.openClient(DeviceMonitor.java:803)
at com.android.ddmlib.DeviceMonitor.deviceClientMonitorLoop(DeviceMonitor.java:621)
at com.android.ddmlib.DeviceMonitor.access$100(DeviceMonitor.java:44)
at com.android.ddmlib.DeviceMonitor$3.run(DeviceMonitor.java:580)