It could be one of this problem.
if you have not omptimzied your server tcp connection limit (if you are using linux) then maybe device is unable to connect to server.
your GPRS services on SIM / or operators Data services are down for some reason. either lack of network connectivity or something else.
on 6th point when it showed link up (did the device come back online and send data?) if yes, how many devices are there on the server. and which OS is the traccar installed on.?
I am using aws Ubuntu 14.04.2 LTS (GNU/Linux 3.13.0-48-generic x86_64).
I havn't done tcp optimization.
Yes device come back online and sent data. I have only 222 devices. All devices are GT06, This is issue with 4-5 devices and rest working fine.
Below is aws console snapshot -
System load: 0.05 Processes: 114
Usage of /: 39.9% of 29.39GB Users logged in: 0
Memory usage: 39% IP address for eth0: 172.31.31.191
Swap usage: 0%
Can you please suggest how to do tcp connection optimization ? Point to any link ?
If only 4 to 5 devices show GPRS Link Down while rest 190+ devices are online and GPRS Link UP chances are you need to troubleshoot on SIM/GPRS Data as well.
however for TCP Connection limit optimization the link is
Issue is below-
Please help what can be the problem ?