Is this a normal reading console?

[macrbest]

I just refreshed my macbook pro 15in and I see this in console logs:

11/19/13 3:31:25.355 PM kdc[1375]: krb5_kdc_set_dbinfo: Failed to find KerberosKDC node
11/19/13 3:31:25.356 PM com.apple.launchd[1]: (com.apple.Kerberos.kdc[1375]) Exited with code: 1
11/19/13 3:31:25.356 PM com.apple.launchd[1]: (com.apple.Kerberos.kdc) Throttling respawn: Will start in 10 seconds
11/19/13 3:31:27.856 PM digest-service[1376]: krb5_kdc_set_dbinfo: Failed to find KerberosKDC node
11/19/13 3:31:27.858 PM com.apple.launchd[1]: (com.apple.Kerberos.digest-service[1376]) Exited with code: 1
11/19/13 3:31:27.858 PM com.apple.launchd[1]: (com.apple.Kerberos.digest-service) Throttling respawn: Will start in 10 seconds
11/19/13 3:31:31.083 PM pacemaker[137]: drift value is zero, setting interval to 60 seconds
11/19/13 3:31:35.369 PM kdc[1377]: krb5_kdc_set_dbinfo: Failed to find KerberosKDC node
11/19/13 3:31:35.370 PM com.apple.launchd[1]: (com.apple.Kerberos.kdc[1377]) Exited with code: 1
11/19/13 3:31:35.370 PM com.apple.launchd[1]: (com.apple.Kerberos.kdc) Throttling respawn: Will start in 10 seconds
11/19/13 3:31:37.876 PM digest-service[1378]: krb5_kdc_set_dbinfo: Failed to find KerberosKDC node
11/19/13 3:31:37.877 PM com.apple.launchd[1]: (com.apple.Kerberos.digest-service[1378]) Exited with code: 1
11/19/13 3:31:37.877 PM com.apple.launchd[1]: (com.apple.Kerberos.digest-service) Throttling respawn: Will start in 10 seconds
11/19/13 3:31:45.384 PM kdc[1379]: krb5_kdc_set_dbinfo: Failed to find KerberosKDC node
11/19/13 3:31:45.385 PM com.apple.launchd[1]: (com.apple.Kerberos.kdc[1379]) Exited with code: 1
11/19/13 3:31:45.385 PM com.apple.launchd[1]: (com.apple.Kerberos.kdc) Throttling respawn: Will start in 10 seconds
11/19/13 3:31:47.897 PM digest-service[1380]: krb5_kdc_set_dbinfo: Failed to find KerberosKDC node
11/19/13 3:31:47.898 PM com.apple.launchd[1]: (com.apple.Kerberos.digest-service[1380]) Exited with code: 1
11/19/13 3:31:47.898 PM com.apple.launchd[1]: (com.apple.Kerberos.digest-service) Throttling respawn: Will start in 10 seconds

What is Kerberos and why does it mention throttling?

 

[joe-h2o]

"throttling respawn" means that OS X is holding off on restarting the process because it keeps crashing, so it is applying a 10 second restart timer to reduce load on the computer.

As to why your kerberos process is crashing, I have no idea - it's part of an authentication system.

 

[macrbest]

Is it some thing that I should be overly concerned with? I also have something that is called QTKitserver in red and then it goes away and comes back again.