In this post, you’ll learn more about the Oracle ErrorORA-27154: post/wait create failed with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-27154: post/wait create failed
Reason for the Error ORA-27154: post/wait create failed
internal error, multiple post/wait creates attempted simultaneously
How to fix the Error ORA-27154: post/wait create failed ?
You can fix this error in Oracle by following the below steps
check errno and contact Oracle Support