java version error

2016-10-30 14:23:59,870 ERROR Unable to create Appender of type RollingRandomAccessFile
[14:23:59] [main/ERROR] [LaunchWrapper]: Unable to launch
java.lang.NullPointerException
        at java.util.Arrays.sort(Arrays.java:1438) ~[?:1.8.0_101]
        at cpw.mods.fml.relauncher.FileListHelper.sortFileList(FileListHelper.java:21) ~[forge-1.7.2-10.12.2.1121-universal.jar:?]
        at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:237) ~[forge-1.7.2-10.12.2.1121-universal.jar:?]
        at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:214) ~[forge-1.7.2-10.12.2.1121-universal.jar:?]
        at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90) ~[forge-1.7.2-10.12.2.1121-universal.jar:?]
        at cpw.mods.fml.relauncher.FMLLaunchHandler.setupServer(FMLLaunchHandler.java:74) ~[forge-1.7.2-10.12.2.1121-universal.jar:?]
        at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForServerLaunch(FMLLaunchHandler.java:39) ~[forge-1.7.2-10.12.2.1121-universal.jar:?]
        at cpw.mods.fml.common.launcher.FMLServerTweaker.injectIntoClassLoader(FMLServerTweaker.java:21) ~[forge-1.7.2-10.12.2.1121-universal.jar:?]
        at net.minecraft.launchwrapper.Launch.launch(Launch.java:114) [launchwrapper-1.9.jar:?]
        at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_101]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_101]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_101]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_101]
        at cpw.mods.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:43) [forge-1.7.2-10.12.2.1121-universal.jar:?]
        at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:12) [forge-1.7.2-10.12.2.1121-universal.jar:?]