EM13c: OMS Hangs / becomes Unresponsive and "emctl status oms" Hangs due to Deadlock between ADFC threads

(Doc ID 2394769.1)

Last updated on MAY 07, 2018

Applies to:

Enterprise Manager Base Platform - Version 13.1.0.0.0 and later
Information in this document applies to any platform.

Symptoms

13c OMS was found to be hung / unresponsive. None of the agents could upload to the OMS and the Console UI is not accessible either.

-  "emctl status oms" command takes10+ minutes to show the output and returns:

-  The number of threads in Blocked state were also found to be high.
    For example, below were the thread count based on the status:

Total number of threads - 631
Waiting : 68
Runnable : 51
Blocked : 397
Timed waiting : 108

    In the above, close to 62% of the threads are in Blocked state. Note that the above numbers could vary based on the setup and OMS configuration.

-  If the OMS is stopped and re-started, it functions fine for few days and then the issue re-occurs.

Cause

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