EM 12c, EM 13c: Database Target is Shown as UP but Homepage Reports Error: IO Error: Got minus one from a read call
(Doc ID 1984376.1)
Last updated on MARCH 26, 2020
Applies to:Enterprise Manager for Oracle Database - Version 220.127.116.11.0 and later
Information in this document applies to any platform.
A database target is shown as UP in the console but the home page in EM Cloud Console shows the following error:
IO Error: Got minus one from a read call The Connect Descriptor was (DESCRIPTION=(ADDRESS_LIST = (ADDRESS=(PROTOCOL=tcp)(HOST=<target database host name>)(PORT=<listener port>)))(CONNECT_DATA=(SID=<target database SID>)(SERVER=DEDICATED)))
- Attempting a 'Test Connection' from the Oracle Database -> Target Setup -> Monitoring Configuration page, also reports similar error.
- From the OMS server, attempting to connect to this target database using the above connect string via sqlplus also fails:
The sqlplus utility is available in the OMS installation from 18.104.22.168 version and above. In the lower releases, the above can be attempted using sqlplus from another RDBMS Client / Server installation, if available.
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