Recently we did some patching activity on our Exadata machines.
One part is the Upgrade of the DB Nodes which includes the upgrade to Oracle Linux 6.
This works fine but afterwards we had a problem starting our the Cloud Control agent.
We saw the following error message: „unable to create new native thread“
[oragrid@db1 ~]$ emctl start agent Oracle Enterprise Manager Cloud Control 12c Release 5 Copyright (c) 1996, 2015 Oracle Corporation. All rights reserved. Starting agent .................................................................... started but not ready. [oragrid@db1 ~]$ emctl status agent Oracle Enterprise Manager Cloud Control 12c Release 5 Copyright (c) 1996, 2015 Oracle Corporation. All rights reserved. --------------------------------------------------------------- unable to create new native thread [oragrid@db1 ~]$ emctl status agent Oracle Enterprise Manager Cloud Control 12c Release 5 Copyright (c) 1996, 2015 Oracle Corporation. All rights reserved. ---------------------------------------------------------------
The problem will be fixed by the following MOS Note and action
EM 12c : Agent Restarts Due To Out Of Memory Exception “ unable to create new native thread“ Out Of System Resources (Doc ID 1499576.1)
For OEL6.x /RHEL 6.x vi /etc/security/limits.d/90-nproc.conf * soft nproc 1024 root soft nproc unlimited Change TO * soft nproc 65536 Restart the agent: $<AGENT_INST>/bin/emctl stop agent $<AGENT_INST>/bin/emctl start agent
After restarting the agent everything works fine.
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