Minecraft – “java.net.UnknownHostException: s3.amazonaws.com” when starting the game

minecraft-java-edition

When trying to start Minecraft this evening on my mac I got the following: 

Bootstrap (v5)
Current time is Jun 2, 2015 8:15:38 PM
System.getProperty('os.name') == 'Mac OS X'
System.getProperty('os.version') == '10.10.3'
System.getProperty('os.arch') == 'x86_64'
System.getProperty('java.version') == '1.6.0_65'
System.getProperty('java.vendor') == 'Apple Inc.'
System.getProperty('sun.arch.data.model') == '64'

Looking for update
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma
Exception: java.net.UnknownHostException: s3.amazonaws.com
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 2/10)
Exception: java.net.UnknownHostException: s3.amazonaws.com
Downloading: LINK REMOVED (try 3/10)
Exception: java.net.UnknownHostException: s3.amazonaws.com
Downloading: LINK REMOVED  (try 4/10)
Exception: java.net.UnknownHostException: s3.amazonaws.com
Downloading: LINK REMOVED  (try 5/10)
Exception: java.net.UnknownHostException: s3.amazonaws.com
Downloading: LINK REMOVED  (try 6/10)
Exception: java.net.UnknownHostException: s3.amazonaws.com
Downloading: LINK REMOVED  (try 7/10)
Exception: java.net.UnknownHostException: s3.amazonaws.com
Downloading: LINK REMOVED  (try 8/10)
Exception: java.net.UnknownHostException: s3.amazonaws.com
Downloading: LINK REMOVED  (try 9/10)
Exception: java.net.UnknownHostException: s3.amazonaws.com
Downloading: LINK REMOVED  (try 10/10)
Exception: java.net.UnknownHostException: s3.amazonaws.com

Unable to download remote file. Check your internet connection/proxy settings.
Didn't find an update in time.
Reversing LZMA on /Users/sam00cleveland/Library/Application Support/minecraft/launcher.pack.lzma to /Users/sam00cleveland/Library/Application Support/minecraft/launcher.pack
FATAL ERROR: net.minecraft.bootstrap.FatalBootstrapError: Unable to un-lzma: LZMA.LzmaException: LZMA : Data Error
    at net.minecraft.bootstrap.Bootstrap.unpack(Bootstrap.java:146)
    at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:123)
    at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:381)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at apple.launcher.LaunchRunner.run(LaunchRunner.java:116)
    at apple.launcher.LaunchRunner.callMain(LaunchRunner.java:51)
    at apple.launcher.JavaApplicationLauncher.launch(JavaApplicationLauncher.java:52)


Please fix the error and restart.

I had to remove the links in the above text as I cannot post more than 2 links…

I copied the link into safari and I could download the file if I removed the https up front.

Best Answer

I see two errors here:

java.net.UnknownHostException: s3.amazonaws.com

Which means that your computer may not be connected to the internet. As it says, check your connection, proxy or any VPNs that you may be using.

net.minecraft.bootstrap.FatalBootstrapError: Unable to un-lzma: LZMA.LzmaException: LZMA : Data Error

Which means that an external library, handling the extraction (decompression) of the LZMA format encountered an error. As for which error - Your file was incorrectly formatted.
As for fixing it, you may want to consider reinstalling your entire Minecraft installation (delete your .minecraft folder) as your initial Minecraft Launcher package was incorrectly downloaded.

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