Martin, I've had this type of error in 10g. Might be the same in 12. The solution was to click "resyncronize agent" on the AGENT home page in the console. Joe -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Martin Bach Sent: Thursday, October 27, 2011 11:00 AM To: oracle-l@xxxxxxxxxxxxx Subject: Oracle 12c agent troubleshooting (EM_PING_NOTIF_RESPONSE: BACKOFF::180000) Good afternoon! It's been a busy day on the mailing list, and maybe I can benefit from this a little :) Before I begin I have to admit that I'm not the best agent troubleshooter, and 12.1 hasn't made that easier. I have 2 agents that are deployed on a 2 node cluster, both have worked in the past. After a reboot, both stopped to function. Now I have this: [oracle@rac11203node1 log]$ emctl status agent Oracle Enterprise Manager 12c Cloud Control 12.1.0.1.0 Copyright (c) 1996, 2011 Oracle Corporation. All rights reserved. --------------------------------------------------------------- Agent Version : 12.1.0.1.0 OMS Version : (unknown) Protocol Version : 12.1.0.1.0 Agent Home : /u01/app/oracle/product/agent_inst Agent Binaries : /u01/app/oracle/product/core/12.1.0.1.0 Agent Process ID : 13270 Parent Process ID : 13215 Agent URL : https://rac11203node1.localdomain:3872/emd/main/ Repository URL : https://oem12oms.localdomain:4901/empbs/upload Started at : 2011-10-26 18:30:17 Started by user : oracle Last Reload : (none) Last successful upload : (none) Last attempted upload : (none) Total Megabytes of XML files uploaded so far : 0 Number of XML files pending upload : 1,858 Size of XML files pending upload(MB) : 8.05 Available disk space on upload filesystem : 49.16% Collection Status : Collections enabled Last attempted heartbeat to OMS : 2011-10-27 15:42:47 Last successful heartbeat to OMS : (none) --------------------------------------------------------------- Agent is Running and Ready The settings are correct, I have verified that with another, uploading and otherwise fine agent. I have also secured the agent, and $AGENT_BASE/agent_inst/sysman/log/secure.log as well as the emctl secure agent commands reported normal, successful operation. Still the stubborn thing doesn't want to talk to the OMS - in the agent overview page both agents are listed as "unavailable", but not blocked. When I force an upload, I get this: [oracle@rac11203node1 log]$ emctl upload Oracle Enterprise Manager 12c Cloud Control 12.1.0.1.0 Copyright (c) 1996, 2011 Oracle Corporation. All rights reserved. --------------------------------------------------------------- EMD upload error:full upload has failed: uploadXMLFiles skipped :: OMS version not checked yet. If this issue persists check trace files for ping to OMS related errors. (OMS_DOWN) However it's not down, I can reach it from another agent (which happens to be on the same box as the OMS) [oracle@oem12oms 12.1.0.1.0]$ $ORACLE_HOME/bin/emctl status agent Oracle Enterprise Manager 12c Cloud Control 12.1.0.1.0 Copyright (c) 1996, 2011 Oracle Corporation. All rights reserved. --------------------------------------------------------------- Agent Version : 12.1.0.1.0 OMS Version : 12.1.0.1.0 Protocol Version : 12.1.0.1.0 Agent Home : /u01/gc12.1/agent/agent_inst Agent Binaries : /u01/gc12.1/agent/core/12.1.0.1.0 Agent Process ID : 2964 Parent Process ID : 2910 Agent URL : https://oem12oms.localdomain:3872/emd/main/ Repository URL : https://oem12oms.localdomain:4901/empbs/upload Started at : 2011-10-15 21:00:37 Started by user : oracle Last Reload : (none) Last successful upload : 2011-10-27 15:46:38 Last attempted upload : 2011-10-27 15:46:38 Total Megabytes of XML files uploaded so far : 137.79 Number of XML files pending upload : 0 Size of XML files pending upload(MB) : 0 Available disk space on upload filesystem : 50.78% Collection Status : Collections enabled Last attempted heartbeat to OMS : 2011-10-27 15:48:34 Last successful heartbeat to OMS : 2011-10-27 15:48:34 --------------------------------------------------------------- Agent is Running and Ready And no, the firewall is turned off and I can connect to the upload from any machine in the network: [oracle@rac11203node1 log]$ wget --no-check-certificate https://oem12oms.localdomain:4901/empbs/upload --2011-10-27 15:55:46-- https://oem12oms.localdomain:4901/empbs/upload Resolving oem12oms.localdomain... 192.168.99.28 Connecting to oem12oms.localdomain|192.168.99.28|:4901... connected. WARNING: cannot verify oem12oms.localdomain's certificate, issued by "/O=EnterpriseManager on oem12oms.localdomain/OU=EnterpriseManager on oem12oms.localdomain/L=EnterpriseManager on oem12oms.localdomain/ST=CA/C=US/CN=oem12oms.localdomain": Self-signed certificate encountered. HTTP request sent, awaiting response... 200 OK Length: 314 [text/html] Saving to: "upload.1" 100%[======================================>] 314 --.-K/s in 0s 2011-10-27 15:55:46 (5.19 MB/s) - "upload.1" saved [314/314] The agent complains about this in gcagent.log: 2011-10-27 15:56:08,947 [37:3F09CD9C] WARN - improper ping interval (EM_PING_NOTIF_RESPONSE: BACKOFF::180000) 2011-10-27 15:56:18,471 [167:E3E93C4C] WARN - improper ping interval (EM_PING_NOTIF_RESPONSE: BACKOFF::180000) 2011-10-27 15:56:18,472 [167:E3E93C4C] WARN - Ping protocol error o.s.gcagent.ping.PingProtocolException [OMS sent an invalid response: "BACKOFF::180000"] At least someone in Oracle has some humour when it comes to this :) For those who read all of this: have you seen that before? Any pointers appreciated. Martin -- http://www.linkedin.com/in/martincarstenbach http://martincarstenbach.wordpress.com -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l