Solved World chunk rendering errors, most apparent with trees and buildings

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jasonmicron

New Member
Jul 29, 2019
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Hello everyone. I've searched the forums but cannot find an answer to this problem.

Usual notes: Latest Ultimate Pack, running in a Linux Xen VM, Fedora 18, 8GB RAM allocated, 2 CPU cores, and a partridge in a pear tree

When I run around my world, I see a lot of chunk loading errors. A lot of the trees and buildings on top of the world don't seem to generate when I start exploring un-rendered chunks or previously loaded chunks. If I quit to the menu screen and log back into the world, the world renders correctly all around me until I start exploring again.

This is VERY apparent with trees. The world knows that they are there, because when I run into them when they aren't displaying, I experience a rubber-band effect and cannot pass through the unrendered block. If I right-click on a block that exists, it will cause the block next to it to appear. Also, occasionally I will receive the error, "username has moved wrongly!".

Issue in a newly rendered area:
mystcraft_error01.jpg


Here is the exact same area after exiting the game and coming back. Notice that it renders correctly:
mystcraft_error02.jpg


The question I have is: Is this a possible tweak I need to make with my server's launch string? I noticed this shortly after I modified my server to launch using the following invocation:

Code:
java -server -XX:UseSSE=4 -XX:+UseCMSCompactAtFullCollection -XX:+UseConcMarkSweepGC
-XX:+DisableExplicitGC -XX:+CMSIncrementalMode -XX:+CMSIncrementalPacing
-XX:+UseCompressedOops -XX:+AggressiveOpts -Xmx8192M -XX:ParallelGCThreads=2
-jar ftbserver.jar nogui

Has anyone else seen this issue before?
 

jasonmicron

New Member
Jul 29, 2019
20
0
0
Solved. The issue was with the version of the TickThreading mod I as running (1119). Updating to the most recent release, 1212 as of March 25th, fixed the issue. This was also causing frequent disconnects and "End of Stream" messages, all tied to the ChickenCode (whatever) mod.

Hope this helps someone else.