How to troubleshoot Selenium Grid?

You can troubleshoot using 2 ways:

Using -debug argument in Selenium Grid

You can use -debug argument to print debug logs to console. Start Selenium Grid Hub or Node with -debug argument. Please see the below example:

$ java -jar selenium-server-standalone.jar -role hub -debug

Using Log Files in Selenium Grid

Also For advanced troubleshooting you can specify a log file to log system messages. Start Selenium GRID hub or node with -log argument. Please see the below example:

java -jar selenium-server-standalone.jar -role hub -log logfilename.txt

Use text editor of your choice to open log file ) to find “ERROR” logs if you get issues.