How to refresh what "symcfg -sid xx list -app" returns?

There is a command available to re-initialize the app registration on the symm. This will clear stale entries and allow all the apps to re-register.

The command is internal to EMC, you will need to engage support for this.

Regards,

Those stale entries do not harm until it fills the app registration table and new application fails to register. EMC do not recommend to clear the registration table thats why they have kept the command out of CLI manual.

I would advise to ignore the stale entries as long as its not causing issues

regards,
Saurabh

By default, entries should be expired from the application registry after 90 days.  This can be controlled by a Solutions Enabler options file setting.  The related entries in this file are

# Parameter:            SYMAPI_APPREG_AUTO_EXPIRATION

#

# Allowed values:      DISABLE | ENABLE

#

# Default value:        ENABLE

#

# Description:          Specifies whether to expire entries in the application

#                      registration table, based on their age.

#

#SYMAPI_APPREG_AUTO_EXPIRATION = ENABLE

#------------------------------------------------------------------------------

#

# Parameter:            SYMAPI_APPREG_EXPIRATION_PERIOD

#

# Allowed values:      15 - 365 | 90

#

# Default value:        90

#

# Description:          Sets the number of days after which an entry can be

#                      expired.

#

#SYMAPI_APPREG_EXPIRATION_PERIOD = 90

A discover doesn't change anything as the contents of the application register are held on the array itself and not in the symapi_db.bin file.