Solution : https://service.sap.com/sap/support/notes/564401 (SAP Service marketplace login required)
Key words : 
client-server technology area reason, sap web dispatcher, gw/gw_disconnect release 4, icm patch collection, lcomthe patch collection, patch collection, message server, patch levels, 1024 characters release 6, symptom error
Related Notes : 
       
| 508300 | ICM Patch Collection (Release 6.20) |