Hello everyone.
I've successfully installed and patched with the latest PSU Oracle 12.1.0.2 two-node RAC and after that created CDB without PDB one.
Then removed the prinstalled APEX and replaced it with the latest one.
I've launched the last orachk 12.1.0.2.7 and it has found the following problem:
Make sure machine clocks are synchronized on all nodes to the same NTP source.
DATA FROM TEST-NODE1 - SAME NTP SERVER ACROSS CLUSTER
remote refid st t when poll reach delay offset jitter
==============================================================================
+89.111.54.85 192.36.144.23 2 u 25 1024 377 66.347 -5.228 1.066
*85.254.217.3 62.237.86.234 2 u 7 1024 377 47.756 3.514 1.141
2001:67c:25dc:: .INIT. 16 - - 1024 0 0.000 0.000 0.000
+213.175.93.20 147.231.2.6 2 u 840 1024 377 51.950 1.546 1.477
DATA FROM TEST-NODE2 - SAME NTP SERVER ACROSS CLUSTER
remote refid st t when poll reach delay offset jitter
==============================================================================
*62.149.0.30 .GPS. 1 u 292 1024 377 25.578 0.163 0.063
I'm not sure if it is really a problem.
Please advise