Description: Exception while updating neighbours

java.lang.StackOverflowError: Exception while updating neighbours
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(Unknown Source)
	at java.security.SecureClassLoader.defineClass(Unknown Source)
	at java.net.URLClassLoader.defineClass(Unknown Source)
	at java.net.URLClassLoader.access$100(Unknown Source)
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at aen.d(SourceFile:430)
	at aen.c(SourceFile:394)
	at aen.b(SourceFile:363)
	at aen.a(SourceFile:307)
	at aen.g(SourceFile:326)
	at ahp.b(SourceFile:78)
	at lg.a(SourceFile:433)
	at lg.a(SourceFile:419)
	at ahp.c(SourceFile:224)
	at aok.a(SourceFile:551)
	at aen.a(SourceFile:291)
	at alf.f(SourceFile:31)
	at alf.a(SourceFile:25)
	at aen.d(SourceFile:428)
	at aen.c(SourceFile:392)
	at aen.b(SourceFile:363)
	at aen.a(SourceFile:307)
	at aen.g(SourceFile:326)
	at ahp.b(SourceFile:78)
	at lg.a(SourceFile:433)