The following error is received when installing or running Control-M/Server with Postgres on a Windows host: Could not receive data from client: No connection could be made because the target machine actively refused it

Knowledge Article

Article Number

000302109

Old Article Number

000095276

Article Type

Solutions to a Product Problem

Title

The following error is received when installing or running Control-M/Server with Postgres on a Windows host: Could not receive data from client: No connection could be made because the target machine actively refused it

Summary

Product

Control-M/Server for UNIX and Microsoft Windows

Component

Control-M/Server for UNIX and Microsoft Windows

Applies to

Control-M/Server any version

Problem

The following error is received when installing or running Control-M/Server with Postgres on a Windows host: "Could not receive data from client: No connection could be made because the target machine actively refused it"

Cause

Solution

Legacy ID:KA318415

Collisions in the port pool can prevent components from communicating with each other efficiently.

Adjusting the MaxUserPort registry entry (which does not exist by default) to a larger value reduces the likelihood of collisions by allowing Windows a greater range of port values to choose from when allocating ports.

To increase the maximum number of ephemeral ports, the following steps should be accomplished by or with the assistance of a Windows Administrator:

1. Start Registry Editor.

2. Locate the following subkey in the registry, and then click Parameters:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

3. On the Edit menu, click New, and then add the following registry entry:

Value Name: MaxUserPort
Value Type: DWORD
Value data: 65534
Valid Range: 5000-65534 (decimal)
Default: 0x1388 (5000 decimal)
Description: This parameter controls the maximum port number that is used when a program requests any available user port from the system. Typically, ephemeral (short-lived) ports are allocated between the values of 1024 and 5000 inclusive.

4. Exit Registry Editor, and then restart the computer.

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