[1.7.10] Need server freeze diagnostic advice

[iamtakingiteasy]

Hi, i had a 1.7.10 server with forge 10.13.4.1558 with following mods:

forgeessentials-1.7.10-1.4.6.1341-server.jar
gregtech-5.09.31.jar
industrialcraft-2-2.2.828-experimental.jar
OpenComputers-MC1.7.10-1.7.1.1127-universal.jar
worldedit-forge-mc1.7.10-6.1.1-SNAPSHOT-dist.jar

and it was fine for ~week. Then i added thee other mods:

StorageDrawers-1.7.10-1.10.9.jar
Treecapitator-universal-2.0.4.jar
witchery-1.7.10-0.24.1.jar

and everything went wrong; after a couple of hours of uptime, server process is going almost completly unresponsive: all connected users are timed out, all new connections are timing out, no further gameplay is possible, there is no response even to console commands and only thing i may do at this point is to send ^C (SIGINT signal on console), suprisingly resulting in a graceful termination.

 

The most dreadful thing is that there is no errors, exceptions or such in logs, at least on INFO loglevel.

Question: how it is possible to diagnose such situation; i was trying JMX, but all it shows is memory and cpu graphs going horizontal lines instead of jumping spikes: 

without any really useful info in samplers. What could have gone wrong, is there any way to debug?

Edited January 9, 2018 by iamtakingiteasy
Accidently pressed post button during creation of thread

[Draco18s]

1) This board is for people making (progrmaming) mods, not running servers

2) This entire forum no longer supports 1.7.10

[iamtakingiteasy]

>1) This board is for people making (progrmaming) mods, not running servers
I thought i was posting at Minecraft Forge > General Discussion and then got moved here by someone, after thread creation, actually.

 

>2) This entire forum no longer supports 1.7.10
Ouch! Didn't knew that, sorry. But if some kind person will find time and strength to help me diagnose the issue i am dealing with (probably on general methodology level and reading directions), it would be nice.