Information

Title	Port Scanning software causes RPLA process to terminate

URL Name	P125480

Article Number	000183321

Environment	Product: OpenEdge Replication Version: All supported versions OS: All supported platforms

Question/Problem Description

rpagent process terminates abnormally
RPLA process crashes

Steps to Reproduce

Clarifying Information

In some cases, the rpagent process does not fully terminate and starts consuming CPU
Running port scanning software (NMap, NESSUS, Nexpose)

listener-minport listener-maxport defined in the targetdb.repl.properties for the replication agent listener port do not start with the same number as the Listening Port defined for the replication target database in the sourcedb.repl.properties control-agent.agent section.

The control-agent port is not part of the listener-minport listener-maxport range.
The target database Listener Port (-S) is not part of the listener-minport listener-maxport range

Error Message	(9407) Connect ion failure for host <hostname> port 43224 transport TCP. (11699) A TCP/IP failure has occurred. The Agent's will enter PRE-TRANSITION, waiting for connection from the Replication Server. (5565) PROGRESS AppServer network protocol mismatch. (10504) Unexpected error -4010 returned to function rpAGT_AgentLoop. (10491) A communications error -155 occurred in function rpNLA_SendAgentError while sending AGENTERROR. (10482) The Fathom Replication Agent is shutting down.

Error Message

(9407) Connect ion failure for host <hostname> port 43224 transport TCP.
(11699) A TCP/IP failure has occurred. The Agent's will enter PRE-TRANSITION, waiting for connection from the Replication Server.
(5565) PROGRESS AppServer network protocol mismatch.
(10504) Unexpected error -4010 returned to function rpAGT_AgentLoop.
(10491) A communications error -155 occurred in function rpNLA_SendAgentError while sending AGENTERROR.
(10482) The Fathom Replication Agent is shutting down.

Defect Number

Enhancement Number

Cause

The RPLA (rpagent) terminates or goes runaway when it's listener port is scanned by Port Scanning software. This issue typically includes the (5565) protocol mismatch error pre-ceeded by the 9407 message on the agent listener port:

Connection failure for host <hostname> port <agent listener portnumber> transport TCP.(9407)

Resolution

Configure the port scanning software not to scan the database Broker (-S) and the agent listener ports (listener-minport, listener-maxport ).
The Server Ports (-minport, -maxport) will also need to be excluded if clients connect cilent/server to the target database.

Workaround

Notes

Progress Article:

What ports need to be open for OpenEdge Replication through a firewall

Keyword Phrase

Last Modified Date	4/28/2022 12:36 AM

Port Scanning software causes RPLA process to terminate

Information