AVDF DBFW Resilient Pair Failed Over Due To Missed Heartbeat When rsyslogd Was Stalled

(Doc ID 2317851.1)

Last updated on OCTOBER 18, 2017

Applies to:

Oracle Audit Vault and Database Firewall - Version 12.1.2.6 and later
Information in this document applies to any platform.

Symptoms

Resilient DBFW pair failed over due to missed heartbeat. However, there was no obvious
problems or errors in DBFW processes or network why heartbeat did not reach AVS.

/var/log/messages on AVS showed there was no heartbeat received from
the enforcement point (EP_TEST) on DBFW server fw01 for 30 seconds
and considered to be lost.

Oct 28 04:02:01 avs01 rsyslogd: [origin software="rsyslogd" swVersion="3.2
2.1" x-pid="6526" x-info="http://www.rsyslog.com"] (re)start
Oct 28 04:02:05 avs01 mwecsvc: com.oracle.dbfw.MwecSyslogMessages WARN -
Enforcement point missed a heartbeat (4 seconds since last heartbeat)
(EP_TEST@fw01)
Oct 28 04:02:05 avs01 mwecsvc: com.oracle.dbfw.MwecSyslogMessages WARN -
Enforcement point missed a heartbeat (4 seconds since last heartbeat)
(EP_TEST@fw01)
Oct 28 04:02:32 avs01 mwecsvc: com.oracle.dbfw.MwecSyslogMessages WARN -
Enforcement point lost, missed 30 consecutive heartbeats (EP_TEST@fw01)
Oct 28 04:02:32 avs01 mwecsvc: com.oracle.dbfw.MwecSyslogMessages WARN -
Enforcement point lost, missed 30 consecutive heartbeats (EP_TEST@fw01)
Oct 28 04:02:33 avs01 mwecsvc: com.oracle.dbfw.MwecSyslogMessages WARN -
Firewall lost, no heartbeats for 30 seconds (fw01)

Looking at /var/log/messages on primary DBFW, rsyslogd restarted everyday at 4:02
in this system.

Oct 27 04:02:02 fw01 kernel: imklog 3.22.1, log source = /proc/kmsg started.
Oct 27 04:02:02 fw01 rsyslogd: [origin software="rsyslogd"
swVersion="3.22.1" x-pid="8779" x-info="http://www.rsyslog.com"] (re)start

/var/log/messages on Primary FW shows no error but rsyslogd was restarted at
4:03 which is the same time this issue occurred. So there was some delay restarting rsyslogd.

Oct 28 04:03:02 fw01 kernel: imklog 3.22.1, log source = /proc/kmsg started.
Oct 28 04:03:02 fw01 rsyslogd: [origin software="rsyslogd"
swVersion="3.22.1" x-pid="8779" x-info="http://www.rsyslog.com"] (re)start

 

Cause

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