KB-1862 Application server crashes with "java: double free or corruption" error


The application server crashes with the following error in the application server log:

Error in `<FILEPATH_TO_JAVA>/java': double free or corruption (fasttop)

The following conditions are also true:

  • The PDF Tools plugin is installed on the site, and the plugin version is earlier than 2.0.
  • The site uses the Convert PDF To Image smart service.


Underlying JAR files used by older versions of the PDF Tools plugin do not properly handle certain use cases in the Convert PDF To Image smart service. These underlying JAR files have since been updated and fixed.


Deploy the most recent version of the PDF Tools plugin via the Appian Admin Console.

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: Feburary 2019