I just can’t figure it out, why i get this error. It is not always shown, but once it appears, my application refuses to accept connections (can’t create new Socket-Threads, and also other threads i create in my JAVA-application for some of them i use ThreadPool).
top and htop shows me, there is ~ 900 MB of 2048MB used.
and there is also enough heap memory, about 200MB free.
cat /proc/sys/kernel/threads-max outputs:
1196032
and also, everything worked fine few days ago, it’s a multiplayer-online game, and we had over 200 users online(~500 threads in total). But now even with 80 users online(~200 threads) after 10 min or few hours my application gets somehow broken with this OutOfMemoryError. In this case i do restart my application and again it works only for this short period of time.
I am very curious about, what if JVM act strangely on VPS, since other VPS on the same physical machine do also use JVM. Is that even possible?
Is there some sort of limit by provider what is not visible to me?
Or is there some sort of server attack?
I should also mention, by the time this error occours, sometimes munin fails to log the data for about only 10 min. Looking at graph-images, there is just white-space, like munin is not working at all. And again there is about 1 GB memory free as htop tells me by that time.
It might be also we case, i somehow produced a bug in my application. And start getting this error after I’ve done update. But even so, where do i begin the debugging ?
try increasing the stack size (-Xss)