Minecraft Server Crash

Whenever I run my MC server (using a batch file for extra RAM) the server runs fine for about a minuet then crashes.

Attached is the bug report.

The Batch File script used:
java -Xmx1024M -Xms1024 -jar minecraft_server.1.8.exe > tempserverlog.txt

Note: The tempserverlog.txt is to view the output of the MC server