This indicates an attack attempt against an Information Disclosure vulnerability in Apache Tomcat.
The vulnerability is due to an error when vulnerable software handles a GET request with malformed file name. A remote attacker may be able to view the source code of JSP files on vulnerable systems.
Apache Tomcat version 7.0.0 to 7.0.79
Information Disclosure: Remote attackers can gain sensitive information on vulnerable systems.
Apply the most recent upgrade or patch from the vendor.