The below output is from just running docker run -it -e SERVER_URL="https://localhost/" jetbrains/teamcity-agent. It appears that the first few characters of the log lines are being eaten by something - possibly bad log formatting options somewhere?
[2018-02-28 18:54:18,227] INFO - rver.plugins.PluginManagerImpl - ===========================================================
[2018-02-28 18:54:18,227] INFO - rver.plugins.PluginManagerImpl - Plugins initialization started...
[2018-02-28 18:54:18,228] INFO - rver.plugins.PluginManagerImpl - Scanning plugins folders
[2018-02-28 18:54:18,229] INFO - .plugins.files.JarSearcherBase - Scanning plugin folder: /opt/buildagent/plugins
[2018-02-28 18:54:18,230] INFO - .plugins.files.JarSearcherBase - Scanning plugin folder: /opt/buildagent/tools
[2018-02-28 18:54:18,240] INFO - rver.plugins.PluginManagerImpl - Found 1 non bundled plugins: [amazonEC2]
[2018-02-28 18:54:18,240] INFO - rver.plugins.PluginManagerImpl - Found 0 bundled plugins: []
[2018-02-28 18:54:18,241] INFO - rver.plugins.PluginsCollection - Load shared classloader for 1 plugins [amazonEC2]
[2018-02-28 18:54:18,245] INFO - rver.plugins.PluginsCollection - No plugins were loaded with standalone classloaders
[2018-02-28 18:54:18,336] INFO - rver.plugins.PluginManagerImpl - Plugins initialization completed (1 plugins loaded): [amazonEC2]
[2018-02-28 18:54:18,338] INFO - rver.plugins.PluginManagerImpl - ===========================================================
That's ok, we use formatting which truncates logging category: [%d] %6p - %30.30c - %m %n, you may change it if you need in teamcity-agent-log4j.xml file
The below output is from just running
docker run -it -e SERVER_URL="https://localhost/" jetbrains/teamcity-agent
. It appears that the first few characters of the log lines are being eaten by something - possibly bad log formatting options somewhere?