HADB-E-05521: Operation on semaphore with key "46025" failed, OS status=28 : No space left on device
This can be caused when the number of semaphores is too low. Since the semaphores are provided as a global resource by the operating system, the configuration depends on all processes running on the host, not only the HADB. This can occur either while starting the HADB, or during runtime.
Configure the semaphore settings by editing the /etc/system file. Instructions and guidelines are contained in the Configuring Shared Memory and Semaphores section of the Preparing for HADB Setup chapter of the Sun Java System Application Server Installation Guide.