EM13c:Agent启动失败emagent.nohup提示"EMAgent has exited due to...

刘泽宇

现象：
EM 13.2 Agent fails to start with the following error:

$AGENT_INST_HOME/bin>./emctl start agent

Oracle Enterprise Manager Cloud Control 13c Release 2
Copyright (c) 1996, 2016 Oracle Corporation. All rights reserved.
Starting agent ............... failed.
Consult emctl.log and emagent.nohup in: /home/oracle/app/agent/agent_13.2.0.0.0/stage/sysman/log
$AGENT_INST_HOME/sysman/log/emagent.nohup file shows below errors

----- 2018-04-17 10:54:57,273::61714::Checking status of EMAgent : 61757 -----
----- 2018-04-17 10:54:57,273::61714::EMAgent exited at 2018-04-17 10:54:57,273 with return value 55. -----
----- 2018-04-17 10:54:57,273::61714::EMAgent has exited due to initialization failure. -----
----- 2018-04-17 10:54:57,273::61714::Stopping other components. -----
----- 2018-04-17 10:54:57,273::61714::Commiting Process death. -----
----- 2018-04-17 10:54:57,273::61714::writeAbnormalExitTimestampToAgntStmp: exitCause=ABNORMAL : restartRequired=0 -----
----- 2018-04-17 10:54:57,274::61714::Generating additional diagnostics for 61757

原因：
Agent installation is not completed successfully. No targets are added in the $<AGENT_INST>/sysman/emd/targets.xml file as well as in the repository Database tables.

1. AGENT_INST_HOME/sysman/emd/targets.xml file shows below

<?xml version = "1.0"?>
<Targets>
</Targets>

2. Connect to EM repository database as a sysman user.

SQL> select target_name, timezone_region from mgmt_targets where emd_url like '%<AGENT_HOSTNAME>%';
no rows selected

SQL> select entity_name,entity_type, manage_status , promote_status, emd_url from em_manageable_entities where emd_url like '%<AGENT_HOSTNAME>%';
no rows selected

处理方法：
Reinstall the Agent.
a) Deinstall the agent as per the steps given in
EM 13C: How to Deinstall the Enterprise Manager 13c Cloud Control Agent (Doc ID 2095678.1)

b) Agent deployment through console can be followed as per the instructions given in the following document.
https://docs.oracle.com/cd/E73210_01/EMBSC/GUID-D08C7C37-7BCD-4E32-A74B-7C5FD266D151.htm#GUID-5FB528B7-40EC-4597-878C-C27B04992230