All PingAuthorize Server instances will shut down in an out-of-memory condition, a low-disk-space error state, or if they run out of file descriptors.
The server will enter lockdown mode on unrecoverable database environment errors, but can be configured to shutdown instead with this setting:
$ dsconfig set-global-configuration-prop \
--set unrecoverable-database-error-mode:initiate-server-shutdown