cas 4.2.3 can not load webflow.encryption.key property

[Stan Sun]

Hi,

I am building the cas-server clusters based on 4.2.3 now.
I need to specify the same webflow.encryption.key and webflow.signing.key for all cas-servers so that they can share sessions.

However, cas-server can't read the following properties for WebflowCipherExecutor from /etc/cas/cas.properties.



# The encryption secret key. By default, must be a octet string of size 256.
webflow.encryption.key=K_JTCq8uRbvugXAOjPLqxPbNcpMYmxbpkqG6Th1nfSo

# The signing secret key. By default, must be a octet string of size 512.
webflow.signing.key=chgXCqVshPIGkeBR8E1UukR6HBGPY9-NfsxtyYslgB_4tobs3uRmDnqKCOuhUuRS633cmFZsbRDqL4g_eQTlMQ

Besides, the log is as follows
2016-08-17 16:43:21,271 WARN [org.jasig.cas.util.WebflowCipherExecutor] - <Secret key for signing is not defined. CAS will attempt to auto-generate the signing key>
2016-08-17 16:43:21,275 WARN [org.jasig.cas.util.WebflowCipherExecutor] - <Generated signing key pGg6HPdDHja5GdKWGxZaSsYScPrQqztY6guRQYsF5LmsfBu1JT8JgOISElwpOkLmW7CAnksOxON-pAiT1hqfew of size 512. The generated key MUST be added to CAS settings.>
2016-08-17 16:43:21,275 WARN [org.jasig.cas.util.WebflowCipherExecutor] - <No encryption key is defined. CAS will attempt to auto-generate keys>
2016-08-17 16:43:21,277 WARN [org.jasig.cas.util.WebflowCipherExecutor] - <Generated encryption key cheuwfbbDkQMXQlT of size 16. The generated key MUST be added to CAS settings.>


What's more,  cas-server can load other property such as 
memcached.servers=xx.xx.xx.xx:11211


Is it a known bug? Does anyone give me a suggestion?