If you have played Eaglercraft before but it suddenly stopped working, or if you are trying to run a downloaded file, the issue is often the client trying to "phone home" to the now-dead official servers.
How to fix it:
EaglerCraft 120/1 is a patch/update addressing a security issue (unauthorized map download and client exploit) in the EaglerCraft Classic server/client build. This write-up describes the vulnerability, affected components, root cause, exploit overview, fix implemented, testing, and mitigation steps. eaglercraft 120 1 fix
-Xms1024M -Xmx2048M
This will allocate 1024MB of RAM as the initial heap size and 2048MB as the maximum heap size. If you have played Eaglercraft before but it