Solution : https://service.sap.com/sap/support/notes/1645622 (SAP Service marketplace login required)
Summary :
In transaction SM51, an instance may not be displayed if the message server disconnects after not receiving data within a predefined timeout, set at 40 seconds by default in the ms/suspend_check parameter. This issue could be exacerbated by delays in the 'Reverse Name Lookup' function tied to the rdisp/reverse_name_lookup parameter. Effective solutions include disabling the reverse lookup function or updating the system with a patch that handles extended lookup delays better, thereby preventing communication blockages between the dispatcher and the message server. Using transaction RZ11 or the niping program can be instrumental in diagnosing and mitigating this issue.
Key words :
terms rdisp/reverse_name_lookup reason, profile parameter ms/suspend_check, profile parameter rdisp/reverse_name_lookup, trace file dev_ms, symptom transaction sm51, sp patch level, message server closes, message server, transaction rz11, patch levels
Related Notes :
| 1055602 | Automatically deactivating the reverse name lookup |