Here is the stack trace
java.lang.NullPointerException
at org.apache.harmony.nio.internal.FileChannelImpl.read(FileChannelImpl.java:280)
at org.apache.harmony.nio.internal.PipeImpl$PipeSourceChannel.read(PipeImpl.java:84)
at org.apache.harmony.nio.internal.SelectorImpl.processSelectResult(SelectorImpl.java:301)
at org.apache.harmony.nio.internal.SelectorImpl.selectInternal(SelectorImpl.java:228)
at org.apache.harmony.nio.internal.SelectorImpl.selectNow(SelectorImpl.java:191)
at com.koushikdutta.async.SelectorWrapper.selectNow(SourceFile:26)
at com.koushikdutta.async.AsyncServer.runLoop(SourceFile:705)
at com.koushikdutta.async.AsyncServer.run(SourceFile:608)
at com.koushikdutta.async.AsyncServer.access$700(SourceFile:37)
at com.koushikdutta.async.AsyncServer$13.run(SourceFile:557)