Confluence starts up with error message Unable to load class for JSP
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Note that this knowledge base article was created for the Data Center version of the product. Data Center knowledge base articles for non-Data Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Symptoms
- Confluence starts up with error message displayed on login screen:
- The following appears in the
atlassian-confluence.log:
Cause
org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to load class for JSP
at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:161)
caused by: org.apache.jasper.JasperException: Unable to load class for JSP
at org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:630)
caused by: java.lang.ClassNotFoundException: org.apache.jsp.errors_jsp
at java.net.URLClassLoader$1.run(Unknown Source)Cause
- Root cause is lack of space to load class files needed to start up Confluence.
Resolution
- Disable automatic backups and move to a Production Backup Strategy.
Ensure Confluence has enough disk space and meets the minimum Server Hardware Requirements Guide for disk space.
Last modified on Jan 8, 2025
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