Issue
On one of my AWS ec2 instances running Ubuntu 16.04, I'm getting the following errors filled up in my /var/syslog.
Jul 17 18:11:21 Mysql-Slave systemd[1]: Stopped The CloudWatch Logs agent.
Jul 17 18:11:21 Mysql-Slave systemd[1]: Started The CloudWatch Logs agent.
Jul 17 18:11:26 Mysql-Slave systemd[1]: awslogs.service: Main process exited, code=exited, status=255/n/a
Jul 17 18:11:26 Mysql-Slave systemd[1]: awslogs.service: Unit entered failed state.
Jul 17 18:11:26 Mysql-Slave systemd[1]: awslogs.service: Failed with result 'exit-code'.
Jul 17 18:11:26 Mysql-Slave systemd[1]: awslogs.service: Service hold-off time over, scheduling restart.
Jul 17 18:11:26 Mysql-Slave systemd[1]: Stopped The CloudWatch Logs agent.
Jul 17 18:11:26 Mysql-Slave systemd[1]: Started The CloudWatch Logs agent.
Jul 17 18:11:32 Mysql-Slave systemd[1]: awslogs.service: Main process exited, code=exited, status=255/n/a
Jul 17 18:11:32 Mysql-Slave systemd[1]: awslogs.service: Unit entered failed state.
Jul 17 18:11:32 Mysql-Slave systemd[1]: awslogs.service: Failed with result 'exit-code'.
Jul 17 18:11:32 Mysql-Slave systemd[1]: awslogs.service: Service hold-off time over, scheduling restart.
Jul 17 18:11:32 Mysql-Slave systemd[1]: Stopped The CloudWatch Logs agent.
Jul 17 18:11:32 Mysql-Slave systemd[1]: Started The CloudWatch Logs agent.
The /var/log/awslogs.log contains these messages:
database is locked
2018-07-17 20:59:01,055 - cwlogs.push - INFO - 27074 - MainThread - Missing or invalid value for use_gzip_http_content_encoding config. Defaulting to using gzip encoding.
2018-07-17 20:59:01,055 - cwlogs.push - INFO - 27074 - MainThread - Using default logging configuration.
database is locked
2018-07-17 20:59:06,549 - cwlogs.push - INFO - 27104 - MainThread - Missing or invalid value for use_gzip_http_content_encoding config. Defaulting to using gzip encoding.
2018-07-17 20:59:06,549 - cwlogs.push - INFO - 27104 - MainThread - Using default logging configuration.
database is locked
2018-07-17 20:59:12,054 - cwlogs.push - INFO - 27110 - MainThread - Missing or invalid value for use_gzip_http_content_encoding config. Defaulting to using gzip encoding.
2018-07-17 20:59:12,054 - cwlogs.push - INFO - 27110 - MainThread - Using default logging configuration.
Any pointers in troubleshooting this will be of great help.
Solution
A similar issue was posted in the following link - https://forums.aws.amazon.com/thread.jspa?threadID=165134
I did the following:
a) Stopped the awslogs service
$ service awslogs stop
b) Deleted the agent-state file in /var/awslogs/state/ (I renamed it in my case)
$ mv agent-state agent-state.old
c) Restarted the awslogs service
$ service awslogs start
A new agent-state file was created as a result and the errors mentioned my post disappeared after this.
Answered By - Deb