Too many open files issue

Hi Anton,
I am facing below mentioned issue in Traccar3.17-
I have applied optimizations which you have suggested in documnets.

FINEST|1286/0|Service traccar|18-09-22 18:53:15|Sep 22, 2018 6:53:15 PM org.jboss.netty.channel.socket.nio.AbstractNioSelector
FINEST|1286/0|Service traccar|18-09-22 18:53:15|WARNING: Failed to accept a connection.
FINEST|1286/0|Service traccar|18-09-22 18:53:15|java.io.IOException: Too many open files
FINEST|1286/0|Service traccar|18-09-22 18:53:15|	at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
FINEST|1286/0|Service traccar|18-09-22 18:53:15|	at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)
FINEST|1286/0|Service traccar|18-09-22 18:53:15|	at org.jboss.netty.channel.socket.nio.NioServerBoss.process(NioServerBoss.java:100)
FINEST|1286/0|Service traccar|18-09-22 18:53:15|	at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
FINEST|1286/0|Service traccar|18-09-22 18:53:15|	at org.jboss.netty.channel.socket.nio.NioServerBoss.run(NioServerBoss.java:42)
FINEST|1286/0|Service traccar|18-09-22 18:53:15|	at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
FINEST|1286/0|Service traccar|18-09-22 18:53:15|	at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
FINEST|1286/0|Service traccar|18-09-22 18:53:15|	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
FINEST|1286/0|Service traccar|18-09-22 18:53:15|	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
FINEST|1286/0|Service traccar|18-09-22 18:53:15|	at java.lang.Thread.run(Thread.java:745)
FINEST|1286/0|Service traccar|18-09-22 18:53:15|

When I check for Traccar process it will show below mentioned limits-

cat /proc/2773/limits

Max open files 150000 150000 files

Are you sure it's the right process? How many connections do you have?

Hi

I have followed below mentioned steps-

1. cat /run/wrapper.traccar.pid
2. output is - 7105
3. cat /proc/7105/limits
4. output is below

Max open files            150000               150000               files
Max processes             63794                63794                processes

I have 350+ devices and connections are -

 netstat -ant | awk '{print $6}' | sort | uniq -c | sort -n
      1 established)
      1 Foreign
      3 LAST_ACK
      5 SYN_RECV
     41 FIN_WAIT1
     50 TIME_WAIT
    161 LISTEN
    520 ESTABLISHED

server configurations are-
RAM - 8GB
HD- 50GB

Is that wrapper limit or Traccar limit?

I have check with this pid and the result is the same-

INFO|wrapper|Service traccar|18-09-24 11:47:34|posix_spawn pid 8693
INFO|wrapper|Service traccar|18-09-24 11:47:34|started process 8693
INFO|wrapper|Service traccar|18-09-24 11:47:34|started process with pid 8693

There are two processes. Which one are you talking about?

with pid - 8693

Is it wrapper or Traccar process? Number doesn't tell me anything.

It is traccar process

Then I'm not sure how it's possible. "Too many open files" error is coming from the operating system itself, so there must be some reason.

ok. I am using ubuntu. Can you suggest best os for the production.

Any Linux should be fine. You need to find out why it gives you this error.