This indicates an attack attempt against a Code Execution vulnerability in Oracle GlassFish Server.
The vulnerability is caused by an error when the vulnerable software handles a malicious upload. It allows a remote attacker to execute arbitrary code via sending a malicious "WAR" file.
Oracle Sun GlassFish Enterprise Server 2.1, 2.1.1, and 3.0.1
Sun Java System Application Server 9.1
System Compromise: Remote code execution.
Apply the latest update from the vendor.