Oracle 11.2 DBconsole: ERROR TargetManager: TIMEOUT when compute dynamic properties for target

Errors in emagent.trc

2014-09-27 11:15:08,109 Thread-11772 WARN  command: Job Subsystem Timeout set at 600 seconds
2014-09-27 11:15:08,125 Thread-11772 WARN  upload: Upload manager has no Failure script: disabled
2014-09-27 11:15:08,140 Thread-11772 WARN  metadata: Metric VirtualHosts does not have any data columns
2014-09-27 11:15:08,140 Thread-11772 WARN  metadata: Metric collectSnapshot does not have any data columns
2014-09-27 11:15:08,187 Thread-11772 WARN  metadata: Metric hung_system_traces does not have any data columns
2014-09-27 11:15:08,249 Thread-6148 WARN  TargetManager: Query returned 0 rows (only one expected) for the dynamic property from_cluster
2014-09-27 11:17:08,263 Thread-10144 ERROR TargetManager: TIMEOUT when compute dynamic properties for target db11g
2014-09-27 11:17:08,263 Thread-10144 ERROR TargetManager: nmeetm.c : Target db11g has a failed critical dynamic property
2014-09-27 11:17:08,263 Thread-10144 ERROR TargetManager: Target Manager: Target {db11g, oracle_database} is broken: dynamic properties can not be calculated in time.

Solution:

Update emd.properties file:

# changed from default 120
dynamicPropsComputeTimeout_oracle_database=240