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# Permissions Required by TopLink Features

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When you run a TopLink-enabled application in a JVM configured with a nondefault `java.lang.SecurityManager` and `doPrivileged` operation is enabled, you may need to grant additional permissions if your application requires any of the following:

- System Properties

- Loading project.xml or sessions.xml Files

- Cache Coordination

- Accessing a Data Source by Port

- Logging With java.util.logging

- J2EE Application Deployment