Hi, I'm using syslog-ng 1.5.15 and sometimes (probably during message burst), messages lost their facility/level and are logged with user/notice. Message format becomes: Mar 29 11:35:50 w3search3 in void echo::AtlasClient::onRead(void *):AtlasClient.cc:427 <130>Mar 29 11:35:50 w3search[19816]: read Context failed on socket=3 in void echo::AtlasClient::onRead(void *):AtlasClient.cc:434 instead of: Mar 29 11:32:07 w3search3 w3search[19817]: read Context failed on socket=3 in void echo::AtlasClient::onRead(void *):AtlasClient.cc:434 General log_fifo_size is set to 1000 and is set to 10000 for appropriate filter of this message: destination d_applicatif { file("/ke/logs/ke.log" owner(test) group(test) log_fifo_size(10000) ); }; filter f_applicatif { facility(local0); }; log { source(s_sys); filter(f_applicatif); destination(d_applicatif); destination(d_loghost_applicatif); flags(final); }; Any Idea ? -- Jerome Peducasse