I've had this probem go away and start up again. I assume you have forge installed.
I just fixed it AGAIN. Extremely frustrating, since you should do a few things to ensure this is not killing your server.
First; it makes you a new world named "world" when it sees your other world that has grown too much in some way for the jvm to handle it. Before I get into that let's cover this;
Delete the file 'world' it made then rename your favorite world as 'world'. I just did that and fixed my problem....
but wait!
You have server properties file; use it. Delete all extras like port number and all that. Now start minecraft using a profile 1.7.2 for example without forge until your world loads up. It should show up, even amplified, and if not follow next steps either way;
Now you're ready to change Java memory settings. (windows 7)
3 things;
1; if you've not set the right path to 32 or 64 bit inside path from environmental variables under computer prop then do. Save your old line incase you screw that up. This tutorial you can find elsewhere I wont get into that.
2;set java virtual memory. Do this under control panel/ programs and features/java/ now under java control panel click java tab then view button. Since I have 8gb of ram (find out your ram # by going to start, right click on computer, properties : to see installed ram) then I am using 4gigs of it for java. CLICK TWICE FAST on the empty spot under RuntimePara...
Enter "-Xms4096m" without the quotation marks ofcourse , assuming you have 8g ram.
1024m if you have 2gigs and so on, since 1024 megabytes is equal to 1gigabyte.
3;(optional) Creative a startserver.bat file using notepad to start up java making double sure your server will be able to handle as much as possible. These numbers you can tweek later just like the other one. Make a text file obviously and enter this;
@echo off
java -Xmx6144M -Xms4096M -jar minecraft_server.1.7.2.jar gui
...that will give you a ram window of 4g to 6gigs instead of 1 to 1 or whatever, but restarting any server might not work eventually until you change the variable inside java virtual machine as stated earlier.
I MAY experience this problem again when I begin running mods in Forge since it takes more memory yet. Part of this problem is actually worse than you might think;
A system using an older hard drive or just one with years of use could have chip errors in the hard drive. They'll always work but do slow down for whatever reason. ..so getting an sshd or sshd hybrid will change things drastically for minecraft.
9.7.2014 mikefromspace utube
It's been a while since I've had to deal with this, but ;
1; I recall fixing it by using an older version of Java since the new one would not allow any use of forge which so far I've only used to run optifine since the microsoft purchase pissed off a major contributor who wrote world edit. I do run 'no more cubes' once in a while for fun but my guy gets stuck on terrain no matter what with that.
2; Using optifine not possible in 1.8 which is slow as the frozen puke it is without optifine and I'm using a quad core i7 920 with 11g ram and a 1gig nvidia gtx260 video card. Even with optifine I need to go 30fps. Why the default ram is 1gig is beyond ridiculous. WHY CAN'T this be adjustable , I mean the script would be like 1 or 2 lines long to fix it !
Minecraft 1.8 is a joke. It's for 5 year olds who don't want amplified which is nuts. I have an amplified server setup. It would never work in 1.8 and I've already put too much work into it.
I purchased 1.7 just after it's release and have continuing intermittent issues with an odd skin for both myself and a friend who I purchased the game for !
In each of our cases we get a strange character with no legs and eyes on top if his head. This has also happened to other friends who join my lobby 1.7.2.
w t f ? It'll also happen sometimes when I join a new server somewhere on rare occasion...well I think it happened once there.
This certainly was an odd bug which I never could track down. Eventually I did end up reinstalling the entire windows7 o.s. and have been running on a rented server instead, but for a short time I did manage to fix the problem accidentally, although it was a line of code inside windows itself which is found under the most advanced settings after right clicking on "computer" to view properties, advanced tab, performance- settings. The issue may have been caused by using too much or too little ram in part, but I suspect it was simply bad ram. I was running 11g using 8 or 10 at the time on the setting with 2 different ddr3 ram brands installed. Later I removed 3 of the 1g old sticks and now using only 2 of the 4g sticks (newer) which doesn't error as it did before when running other programs like a chrome browser with multiple tabs open for example.
I'll be re-testing the server by next weekend I suspect and will see if I can't re-create this problem.
I've had this probem go away and start up again. I assume you have forge installed.
I just fixed it AGAIN. Extremely frustrating, since you should do a few things to ensure this is not killing your server.
First; it makes you a new world named "world" when it sees your other world that has grown too much in some way for the jvm to handle it. Before I get into that let's cover this;
Delete the file 'world' it made then rename your favorite world as 'world'. I just did that and fixed my problem....
but wait!
You have server properties file; use it. Delete all extras like port number and all that. Now start minecraft using a profile 1.7.2 for example without forge until your world loads up. It should show up, even amplified, and if not follow next steps either way;
Now you're ready to change Java memory settings. (windows 7)
3 things;
1; if you've not set the right path to 32 or 64 bit inside path from environmental variables under computer prop then do. Save your old line incase you screw that up. This tutorial you can find elsewhere I wont get into that.
2;set java virtual memory. Do this under control panel/ programs and features/java/ now under java control panel click java tab then view button. Since I have 8gb of ram (find out your ram # by going to start, right click on computer, properties : to see installed ram) then I am using 4gigs of it for java. CLICK TWICE FAST on the empty spot under RuntimePara...
Enter "-Xms4096m" without the quotation marks ofcourse , assuming you have 8g ram.
1024m if you have 2gigs and so on, since 1024 megabytes is equal to 1gigabyte.
3;(optional) Creative a startserver.bat file using notepad to start up java making double sure your server will be able to handle as much as possible. These numbers you can tweek later just like the other one. Make a text file obviously and enter this;
@echo off
java -Xmx6144M -Xms4096M -jar minecraft_server.1.7.2.jar gui
...that will give you a ram window of 4g to 6gigs instead of 1 to 1 or whatever, but restarting any server might not work eventually until you change the variable inside java virtual machine as stated earlier.
I MAY experience this problem again when I begin running mods in Forge since it takes more memory yet. Part of this problem is actually worse than you might think;
A system using an older hard drive or just one with years of use could have chip errors in the hard drive. They'll always work but do slow down for whatever reason. ..so getting an sshd or sshd hybrid will change things drastically for minecraft.
9.7.2014 mikefromspace utube
It's been a while since I've had to deal with this, but ;
1; I recall fixing it by using an older version of Java since the new one would not allow any use of forge which so far I've only used to run optifine since the microsoft purchase pissed off a major contributor who wrote world edit. I do run 'no more cubes' once in a while for fun but my guy gets stuck on terrain no matter what with that.
2; Using optifine not possible in 1.8 which is slow as the frozen puke it is without optifine and I'm using a quad core i7 920 with 11g ram and a 1gig nvidia gtx260 video card. Even with optifine I need to go 30fps. Why the default ram is 1gig is beyond ridiculous. WHY CAN'T this be adjustable , I mean the script would be like 1 or 2 lines long to fix it !
Minecraft 1.8 is a joke. It's for 5 year olds who don't want amplified which is nuts. I have an amplified server setup. It would never work in 1.8 and I've already put too much work into it.
I purchased 1.7 just after it's release and have continuing intermittent issues with an odd skin for both myself and a friend who I purchased the game for !
In each of our cases we get a strange character with no legs and eyes on top if his head. This has also happened to other friends who join my lobby 1.7.2.
w t f ? It'll also happen sometimes when I join a new server somewhere on rare occasion...well I think it happened once there.
This certainly was an odd bug which I never could track down. Eventually I did end up reinstalling the entire windows7 o.s. and have been running on a rented server instead, but for a short time I did manage to fix the problem accidentally, although it was a line of code inside windows itself which is found under the most advanced settings after right clicking on "computer" to view properties, advanced tab, performance- settings. The issue may have been caused by using too much or too little ram in part, but I suspect it was simply bad ram. I was running 11g using 8 or 10 at the time on the setting with 2 different ddr3 ram brands installed. Later I removed 3 of the 1g old sticks and now using only 2 of the 4g sticks (newer) which doesn't error as it did before when running other programs like a chrome browser with multiple tabs open for example.
I'll be re-testing the server by next weekend I suspect and will see if I can't re-create this problem.