all the devices are disconnected at the same time.

all the devices are disconnected at the same time every 24 hrs. the server one can enter but the equipment is disconnected. I have to use service traccar stop and service traccar start and everything returns to normal.

2017-11-27 01:56:48 DEBUG: [1B5B4B42: 5001 < 186.9.133.172] HEX: 3836343138303033323336303437363b
2017-11-27 01:56:48 DEBUG: [1B5B4B42: 5001 > 186.9.133.172] HEX: 4f4e
2017-11-27 04:59:37  INFO: Shutting down server...
2017-11-27 04:59:37  INFO: [769B3C15] disconnected
2017-11-27 04:59:37  INFO: [328A26CE] disconnected

I'm not what you wanted to show in your log fragment. It just shows that devices are disconnected after you stop the service.

FINEST|18437/0|Service traccar|17-12-04 07:38:47|java.io.IOException: Too many open files
FINEST|18437/0|Service traccar|17-12-04 07:38:47|	at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
FINEST|18437/0|Service traccar|17-12-04 07:38:47|	at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)
FINEST|18437/0|Service traccar|17-12-04 07:38:47|	at org.eclipse.jetty.server.ServerConnector.accept(ServerConnector.java:377)
FINEST|18437/0|Service traccar|17-12-04 07:38:47|	at org.eclipse.jetty.server.AbstractConnector$Acceptor.run(AbstractConnector.java:500)
FINEST|18437/0|Service traccar|17-12-04 07:38:47|	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
FINEST|18437/0|Service traccar|17-12-04 07:38:47|	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
FINEST|18437/0|Service traccar|17-12-04 07:38:47|	at java.lang.Thread.run(Thread.java:748)
FINEST|18437/0|Service traccar|17-12-04 07:38:47|[qtp506217546-38-acceptor-0@45fed255-ServerConnector@5ca2ee59{HTTP/1.1}{0.0.0.0:8082}] WARN org.eclipse.jetty.server.ServerConnector - 
FINEST|18437/0|Service traccar|17-12-04 07:38:47|java.io.IOException: Too many open files
...

You have reached the limit of open file handlers. It has been discussed before many times. Use search.

thanks