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Cannot connect to VM | Socket closed [message #1849401]

Mon, 17 January 2022 19:38

Maxim Glebov

Messages: 3
Registered: January 2022

Junior Member

Hello everyone!
I just started to learn how to use Eclipse to create mods for Minecraft 1.12.2 (please take this seriously :) I set up the workspace by downloading mcp (Minecraft Coder Pack) and installed JDK 8 Update 311.
+ all additional stuff in this tutorial:
youtu.be/_TUUWdv8OO4 (links are blocked from me)

Then when I started the "Debug Client" in Eclipse I got the error:

Cannot connect to VM.
Socket closed

Unrecognized option: -Xincgc

Is it even possible to run Eclipse without a virtual machine and how? (if i'm asking stupid questions, sorry)
And if not, how can I fix this error?

I don't know what part of the build the error is in, so ask me all the information you need.

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Re: Cannot connect to VM | Socket closed [message #1849404 is a reply to message #1849401]

Tue, 18 January 2022 04:53

Ed Merks

Messages: 33136
Registered: July 2009

Senior Member

It's like this question where the answer specifically mentions the "Minecraft launcher".

https://stackoverflow.com/questions/70105957/how-can-i-fix-the-unrecognized-option-xincgc

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: Cannot connect to VM | Socket closed [message #1849409 is a reply to message #1849404]

Tue, 18 January 2022 14:08

Maxim Glebov

Messages: 3
Registered: January 2022

Junior Member

Thank you!

Solution:
1. Go to
mcp940\eclipse\.metadata\.plugins\org.eclipse.debug.core\.launches
2. Open Client.launch
3. Paste
<stringAttribute key="org.eclipse.jdt.launching.VM_ARGUMENTS" value="-Xmx1024M -Xms1024M"/>
instead of
<stringAttribute key="org.eclipse.jdt.launching.VM_ARGUMENTS" value="-Xincgc -Xmx1024M -Xms1024M"/>

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