ORA-00020 maximum processes exceeded — Oracle CDB PDB connection leak production incident

ORA-00020: Maximum Processes Exceeded — How Three Different Errors Led to One Root Cause

If you’ve ever hit ORA-00020 maximum processes exceeded in production, you know it rarely announces itself cleanly. Instead, it hides behind a cascade of unrelated-looking errors that send you down completely the wrong diagnostic path. Here’s a real example. You try to reset a password on the ddvpdb pluggable database. Routine task. And Oracle fires Read more about ORA-00020: Maximum Processes Exceeded — How Three Different Errors Led to One Root Cause[…]