oracle job使用详解及job不运行的检查方法(三)
Ref: Bug 3505718 (Closed, Not a Bug)
Done but did not help
These are the most common causes for this behavior.
Solution
The solution ended up to be the server (machine) uptime.
Even though it was up for only 126 days, after the server was rebooted all jobs were able to execute automatically.
To implement the solution, please execute the following steps:
1. Shutdown all applications, including databases.
2. Shutdown the server (machine)
3. Restart all applications, including databases.
4. Check that jobs are executing automatically.
from metalink docs ： 313102.1