Last updated on MARCH 26, 2015
Applies to:Oracle Discoverer - Version 188.8.131.52.15 and later
Information in this document applies to any platform.
***Checked for relevance on 26-Mar-2015***
Launch Discoverer Plus 10g applet, create workbook or navigate in the workbook wizard for some
amount of time. For example: dragging items, create sorts, remove items, format, etc. At some
point the following error would appear on the screen:
The Java Console will have the following error: "Connection refused to host"
workerFailed() in SessionUI.java
: exception oracle.discoverer.corba.DCCORBAException
String mReason="Connection refused to host: <>; nested exception is:
The ipm.log trapped the following errors:
04/10/14 15:32:11  [libopmnoc4j] AJP13: Receiving response code: 500 while configured success
code is: 200
04/10/14 15:32:11  [libopmnoc4j] Ping URL for proc: 1443758317 failed while pinging
The Apache error_log trapped the following errors:
MOD_OC4J_0078: Network connection errors
happened to host: machine.domain.com and port: 3304 while receiving the first response from oc4j.
This request is recoverable.
MOD_OC4J_0015: recv() returns 0. There has
no message available to be received and oc4j has gracefully (orderly) closed the connection.
MOD_OC4J_0054: Failed to call network routine
to receive an ajp13 message from oc4j.
Also, when navigating to the Discoverer Plus connection page, the following error comes intermittently
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