19826 - Communication Agent Connection Congested

Alarm Group:

CAF

Description:

This alarm indicates Communication Agent is experiencing congestion in communication between two servers and this can be caused by a server becoming overloaded or by network problems between two servers.

Severity:

Major

Instance:

N/A

HA Score:

Normal

Auto Clear Seconds:

0 (zero)

OID:

cAFConnCongestedNotify

Cause:

• A connection becomes congested, that is congestion level (CL) increases from ConnCL0 to either ConnCL1, ConnCL2, or ConnCL3. If a connection becomes congested, and there is another congested connection, then update the connection count and re-assert the alarm.
• A connection becomes uncongested, that is congestion level (CL) decreases to ConnCL0, and there is another congested connection. Update the connection count and re-assert the alarm.

Overload can be due to:

• TCP connection has higher latency or error rate, then connection is getting into congestion state
• Far-end server is receiving traffic at higher rate (may be from other servers). This triggers ComAgent congestion on far-end side.
• Application process CPU on far-end is above normal.

Diagnostic Information:

N/A.

Recovery:

1. Navigate to Alarms & Events, and then View History to find additional information for the alarm by locating the row with a sequence number that matches the active alarm sequence number and viewing the Additional Info column.
2. Navigate to Alarms & Events, and then View History to check the event history logs for additional Communication Agent events or alarms from this MP server.
3. Navigate to Communication Agent, and then Maintenance, and then Connection Status to determine which connections on the server have abnormal status.
4. If the Remote MP Overload Level (OL) > 0 then determine why the remote server is congested.
   1. Verify the remote server is not under maintenance.
   2. Examine the remote's CPU utilization.
5. If the problem persists, it is recommended to contact My Oracle Support for assistance.