How to resolve the error "#4.4.5 Too many connections to this listener" found when using Spotfire Statistica Monitoring and Alerting Server (MAS)
Article ID: KB0138557
Updated On:
| Products | Versions |
|---|---|
| Spotfire Statistica - All Servers | 14.0 and higher |
| Spotfire Statistica | 14.0 and higher |
Description
While having the MAS log set to TRACE level, this error may appear, like the following:
DEBUG 2026-06-16 16:38:03.600 3744 14452 Executing alarm actions for rule [Email Notify] of task set [<Task set name>]
TRACE 2026-06-16 16:38:03.600 3744 14452 Enter CreateXMLAlarmReport
DEBUG 2026-06-16 16:38:03.600 3744 14452 Creating XML alarm report for task set [<Task set name>]
DEBUG 2026-06-16 16:38:03.631 3744 14452 XML alarm report created for task set [<Task set name>]
TRACE 2026-06-16 16:38:03.631 3744 14452 Exit CreateXMLAlarmReport
TRACE 2026-06-16 16:38:03.631 3744 14452 Enter XSLTransform
TRACE 2026-06-16 16:38:03.631 3744 14452 Exit XSLTransform
ERROR 2026-06-16 16:38:03.766 3744 14452 Exception detected in CTaskSetInfo::ProcessRulesAndActions. HRESULT = 0x80131500 Description = [#4.4.5 Too many connections to this listener.]
What is happening is while the MAS service is attempting to send an alarm report via email, the connection was refused likely because of a connection limit on the email appliance.
This exact error message appears to only come from a CISCO Email Appliance. See https://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/118234-technote-esa-00.html
Environment
OS: Windows
Resolution
Increase the connection limit on the email applance.
This specific error text indicates that your email is hitting a Cisco Email Security Appliance (ESA) or IronPort gateway at the perimeter of the network. The gateway is actively blocking or throttling the connection because the sending application is initiating too many simultaneous connections at once.
How to resolve this on the Cisco Appliance:
Log into the Cisco ESA/IronPort web interface.
Navigate to Mail Policies > HAT (Host Access Table) overview.
Locate the specific Mail Flow Policy assigned to the IP address of your sending software (e.g., inside your TRUSTED or ALLOWED sender groups).
Look for the Max. Connections Per Host or Max Concurrency per IP field and increase this value to allow for a higher volume of parallel reporting streams.
See https://www.cisco.com/c/en/us/td/docs/security/esa/esa16-0/user_guide/b_ESA_Admin_Guide_16-0/b_ESA_Admin_Guide_12_1_chapter_0100.html?bookSearch=true subsection Configuring Global Settings for Listeners
Issue/Introduction
How to resolve the error "#4.4.5 Too many connections to this listener" found when using Spotfire Statistica Monitoring and Alerting Server (MAS)
Additional Information
