DB Control Agent Unreachable Due to Negative Available Disk Space (Doc ID 1388432.1)

Last updated on FEBRUARY 26, 2014

Applies to:

Enterprise Manager for Oracle Database - Version to [Release 11.2]
Information in this document applies to any platform.


Database Control is reporting  Agent Unreachable but the agent is running. DB Console and Agent starts OK and communication to OMS is working, but Agent status reports negative "Available Disk Space" and collection "Disabled by Upload Manager":

$ORACLE_HOME/bin/emctl status agent
Oracle Enterprise Manager 11g Database Control Release
Copyright (c) 1996, 2010 Oracle Corporation. All rights reserved.
Agent Version :
OMS Version :
Protocol Version :
Agent Home : /oracle/app/oracle/product/<hostname>_<sid>
Agent binaries : /oracle/app/oracle/product/
Agent Process ID : 13237
Parent Process ID : 13189
Agent URL : https://<hostname>:3938/emd/main
Repository URL : https://<hostname>:1158/em/upload/
Started at : 2011-11-30 12:43:49
Started by user : oracle
Last Reload : 2011-11-30 12:43:49
Last successful upload : 2011-11-30 12:44:35
Total Megabytes of XML files uploaded so far : 0.05
Number of XML files pending upload : 2
Size of XML files pending upload(MB) : 0.95
Available disk space on upload filesystem : -677.21%   <<-Notice that this is reporting a negative value
Data channel upload directory : /oracle/app/oracle/product/<hostname>_<sid>/sysman/recv
Collection Status : Disabled by Upload Manager
Last successful heartbeat to OMS : 2011-11-30 12:44:20
Agent is Running and Ready


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