Minecraft Forums

Bootstrap (v5)
Current time is Nov 23, 2014 2:57:38 PM
System.getProperty('os.name') == 'Windows 7'
System.getProperty('os.version') == '6.1'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.8.0_40-ea'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '64'

Looking for update
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma
Got reply in: 818ms
No update found.
Reversing LZMA on C:\Users\Matthew\AppData\Roaming\.minecraft\launcher.pack.lzma to C:\Users\Matthew\AppData\Roaming\.minecraft\launcher.pack
Unpacking C:\Users\Matthew\AppData\Roaming\.minecraft\launcher.pack to C:\Users\Matthew\AppData\Roaming\.minecraft\launcher.jar
Cleaning up C:\Users\Matthew\AppData\Roaming\.minecraft\launcher.pack
Starting launcher.
FATAL ERROR: java.lang.NoClassDefFoundError: sun/management/ExtendedPlatformComponent
at java.lang.management.ManagementFactory.getPlatformMBeanServer(Unknown Source)
at org.apache.logging.log4j.core.jmx.Server.registerMBeans(Server.java:107)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.<init>(Log4jContextFactory.java:59)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at org.apache.logging.log4j.LogManager.<clinit>(LogManager.java:85)
at net.minecraft.launcher.Launcher.<clinit>(Launcher.java:56)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at net.minecraft.bootstrap.Bootstrap.startLauncher(Bootstrap.java:240)
at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:124)
at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:381)


Please fix the error and restart.



Need a urgent solution for this annoying issue

Still the exact same error after trying both methods you pointed out

Don't worry I fixed this error by simply installing JRE7 (Java Runtime Enviroment 7 Windows 64-bit) Keep this for people if they have the exact same bootstrap error http://www.oracle.com/technetwork/java/javase/downloads/java-se-jre-7-download-432155.html