Minor Description
The observer's logs consist of lots of warnings about being unable to find PIDs. This is likely due to the checkpoint pointing to PIDs that have been cleaned by Mesos.
W1117 20:11:38.103549 33983 process_collector_psutil.py:76] Error during process sampling: no process found with pid 39594 W1117 20:11:38.151583 33983 process_collector_psutil.py:76] Error during process sampling: no process found with pid 14012 W1117 20:11:38.232773 33983 process_collector_psutil.py:76] Error during process sampling: no process found with pid 26565 W1117 20:11:38.486680 33983 process_collector_psutil.py:76] Error during process sampling: no process found with pid 44902 W1117 20:11:38.612293 33983 process_collector_psutil.py:76] Error during process sampling: no process found with pid 32871 W1117 20:11:38.694812 33983 process_collector_psutil.py:76] Error during process sampling: no process found with pid 7182
The warning messages should probably be debug messages, since Mesos cleaning sandboxes is an expected operation.