so basically whenever i start the server its void and after like 1 minute server stops. Here is the log. http://pastebin.com/h5gmaWCj
This stacktrace is unreadable, please post it on http://pastebin.com/ so we can see it properly formatted We cant even see the error right why throw that out straight away?
Try removing the "ServerSigns" plugin, if that doesn't fix it I believe it may be a corrupted chunk, and you will need to use the chunk fixer to repair it.
I removed server signs and used Chunkfixer. Whenever i join my server its void do you know how to fix that :/