Hi All,
Need help to understand the cause of this issue.
I am getting the connection drop of like 2-3% at Mail traffic prevent servers. TLS is enabled on all email prevents, but not sure about MTA.
When i checked the wireshark of prevent servers, i can see data transaction after EHELO and getting 421 connection refuse error after data exchange.
Downward MTA --> Load Balancer --> VIP of 6 Email prevent --> Load Balancer -->Upward MTA--> Exchange
##########################Example of 5204###############################################
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.ESMTPPeer close
INFO: (SMTP_CONNECTION.1204) Forward connection closed (tid=24 cid=22,521 local=192.168.11.78:2961 remote=192.168.10.124:25)
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.RequestProcessorHandler handleLine
FINER: RPT(25)|R: 250 2.0.0 Ok
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.ESMTPPeer close
INFO: (SMTP_CONNECTION.1205) Service connection closed (tid=24 cid=22,516 local=192.168.11.78:25 remote=192.168.10.123:7706 messages=26 time=11.08s)
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.RequestProcessorHandler handleLine
FINER: RPT(25)|S: MAIL FROM:<> SIZE=14569
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.RequestProcessorHandler handleLine
FINER: RPT(25)|S: RCPT TO:<w@rcpt.com> ORCPT=rfc822;w@rcpt.com
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.RequestProcessorHandler handleLine
FINER: RPT(25)|S: DATA
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.ESMTPRequestProcessorThread _handlePeerDisconnect
SEVERE: (SMTP_CONNECTION.5204) Peer disconnected unexpectedly (tid=24 cid=22,516 local=<> remote=<> reason=End of stream)
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.ESMTPRequestProcessorThread run
INFO: RPT(24) Waiting for new connection
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.RequestProcessorHandler handleLine
FINER: RPT(25)|R: 250 2.1.0 Ok
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.RequestProcessorHandler handleLine
FINER: RPT(25)|R: 250 2.1.5 Ok
Jul 19, 2016 9:13:30 AM com.vontu.mta.rp.RequestProcessorHandler handleLine
FINER: RPT(25)|R: 354 End data with <CR><LF>.<CR><LF>
################################# Example of 5202#########################################################################
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.ESMTPRequestProcessorThread messageCommitted
INFO: (SMTP_MESSAGE.1300) Message complete (tid=24 cid=22,452 message_id=<13494681262a4bb9ers4aab3d59b18c9a@CY1PR64MB0092.021d.mgd.msft.net> dlp_id=155fd744b8d size=13,772 sender=<za@sender.com> recipient_count=2 disposition=PASS code=250 estatus=<> text=<2.0.0 Ok: queued as 69C1320114> rtime=0.02s dtime=0.02s mtime=0.03s)
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.ESMTPRequestProcessorThread messageComplete
FINE: RPT(24): message complete .. RECEIVING -> COMPLETE
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.RequestProcessorHandler handleLine
FINER: RPT(24)|R: 221 2.0.0 Bye
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.ESMTPRequestProcessorThread _handlePeerDisconnect
INFO: (SMTP_CONNECTION.1202) Peer disconnected (tid=24 cid=22,453 local=192.168.11.78:8148 remote=192.168.10.124:25)
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.ESMTPPeer close
INFO: (SMTP_CONNECTION.1204) Forward connection closed (tid=24 cid=22,453 local=192.168.11.78:8148 remote=192.168.10.124:25)
Jul 19, 2016 9:08:40 AM com.vontu.logging.operational.api.PropertyFileOperationalLogWriter generateLogMessage
WARNING: Argument number mismatch for key SMTP_CONNECTION.5202: layout requires 5 args, but was passed 4
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.ESMTPRequestProcessorThread _handleIOException
INFO: (SMTP_CONNECTION.5202) Sender connection error (tid=24 cid=22,452 local=192.168.10.123:50092 remote=An existing connection was forcibly closed by the remote host reason={4})
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.ESMTPRequestProcessorThread _handleIOException
WARNING: RPT(24): Handling servicing op IOException on RPT(24)[22452|S:[/192.168.11.78:25 -> /192.168.10.123:50092] with peer RPT(24)[22453|R:[{- UNCONNECTED -}] as disconnect.
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.ESMTPRequestProcessorThread _handlePeerDisconnect
INFO: (SMTP_CONNECTION.1202) Peer disconnected (tid=24 cid=22,452 local=192.168.11.78:25 remote=192.168.10.123:50092)
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.ESMTPPeer close
INFO: (SMTP_CONNECTION.1205) Service connection closed (tid=24 cid=22,452 local=192.168.11.78:25 remote=192.168.10.123:50092 messages=1 time=0.03s)
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.ESMTPRequestProcessorThread run
INFO: RPT(24) Waiting for new connection
Jul 19, 2016 9:08:40 AM com.vontu.mta.rp.RequestProcessorHandler handleLine
FINER: RPT(26)|S: RSET
======================================================================
Thanks / Bhupesh