There have been cases in Linux where if a reports job runs indefinitely without finishing or reaching error and the Reports standalone reports server is shut down in OPMN, the standalone reports server will fail to start up in OPMN:
Error
–> Process (pid=#####)
failed to start a managed process after the maximum retry limit
Log:

To fix the problem, the PIDs of all rwserver processes will need to be killed. In order to do this:

  1. Open up a PuTTY session (or a similar SSH client) to the Linux server
  2. Run: “ps -ef | grep rwserver”
  3. There should be multiple (at least 2) instances of rwserver shown. Run “kill PID” where PID is the process for rwserver. NOTE: If that does not work, try “kill -9 PID”.
  4. Repeat steps 2 and 3 until there are no more rwserver processes running.
  5. Try to start the standalone reports server in OPMN. It should start up without failure.