When starting up the server, the server works well. No lag issues. However, there are a lot of "Can't keep up! Is the server overloaded?" messages. The server starts to have extreme lag later on, and sometimes, it even crashes. For example, going through a nether portal to the overworld while in the nether could cause a server crash.
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We do not have enough information to find the cause of this issue.
While the lag occurs, please run /debug start, wait a while and then run /debug stop in order to create a debug profile. Afterwards, run /debug report.
If you do not have the permission to run these commands, open your world to LAN and enable cheats. If you're on a server, make sure that you're a server operator in order to execute these commands.
Then, please attach the profile results found in [minecraft/debug/profile-results-<DATE>.txt|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder], as well as the debug report found in [minecraft/debug/debug-report-<DATE>.zip|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder] here.
This issue has been temporarily closed as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
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