Node can"t start

Hello i get this error message while trying to start node

Oct 25 22:19:44 houseafrica waves-testnet[11712]: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
Oct 25 22:19:44 houseafrica waves-testnet[11712]: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
Oct 25 22:19:44 houseafrica waves-testnet[11712]: at java.lang.Thread.run(Thread.java:748)
Oct 25 22:19:44 houseafrica waves-testnet[11712]: INFO c.w.Application - ExtensionLoader was shutdown successfully
Oct 25 22:19:44 houseafrica waves-testnet[11712]: INFO c.w.Application - Appender was shutdown successfully
Oct 25 22:19:44 houseafrica waves-testnet[11712]: INFO c.w.Application - Closing storage
Oct 25 22:19:44 houseafrica waves-testnet[11712]: INFO c.w.Application - Shutdown complete
Oct 25 22:19:44 houseafrica systemd[1]: waves-testnet.service: Main process exited, code=exited, status=38/n/a
Oct 25 22:19:44 houseafrica systemd[1]: waves-testnet.service: Unit entered failed state.
Oct 25 22:19:44 houseafrica systemd[1]: waves-testnet.service: Failed with result ‘exit-code’.

Please post the complete error message. Hard to guess anything from just few lines