What does 'INFO:tensorflow:Oracle triggered exit' mean with keras tuner?
Probably the reason is, directory is already created.
Try following steps:

Change the directory name.
Restart the kernel.
re-run all the codes.
When I run Keras Tuner search, the code runs for some epochs and then says:
'INFO:tensorflow:Oracle triggered exit'.
What does this mean? I am still able to extract best hyperparameters. Is it due to early stopping? I have tried both randomsearch and hyperband.