https://blogs.oracle.com/NetBeansSupport/entry/tomcat_log_files
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Q: I closed the log windows. How do I get them back?
- Go to 'Services' window ('Window | Services' menu)
- Expand 'servers'
- Right-click on the node for 'tomcat' server
- Select 'View server output' (The menuitem 'view server output' is only available when the server is running; if the server is stopped, the menuitem is greyed out).