Informix Error -4986: Communication between fgld daemon and application server was closed.

Reasons / Common Causes

-4986 fires when the connection between the fgld daemon and the application server is interrupted — per the official guidance.

1. The fgld daemon isn't receiving requests from the application server, per the official guidance — the direct, named area to check.

Solutions / Resolution

1. Check that the application server is able to send requests to the running fgld daemon, per the official guidance.

Examples

Checking that fgld is running

$ ps -ef | grep fgld

Diagnostic Checks

1. Confirm fgld is running, and confirm the application server can reach it (network connectivity, port, process health).

Related Errors / Related Topics

• -4990 — "Unrecoverable error in application server." A related web-service-publishing failure, about the application server itself rather than its connection to fgld.
• -4996 — "Unknown host name or port number." A related fgld connectivity error, about host/port configuration rather than a connection being closed after being established.

The connection between fgld and the application server was interrupted — check that the application server can reach the running fgld daemon.