After ipa-backup completes, fails to start PKI Tomcat Server displaying error pki-tomcatd@pki-tomcat.service Failed with result 'timeout'

Issue

• Running the ipa-backup command stops all IPA services successfully and a backup is taken. When the backup completes, sometimes the pki-tomcatd service fails to start.

• The following errors are displayed in /var/log/messages.

  Nov 21 09:48:59 ipa-server01 systemd[1]: Starting PKI Tomcat Server pki-tomcat...
  Nov 21 09:49:07 ipa-server01 server[1199252]: classpath used: /usr/share/tomcat/bin/bootstrap.jar:/usr/share/tomcat/bin/tomcat-juli.jar:/usr/share/java/ant.jar:/usr/share/java/ant-launcher.jar:/usr/lib/jvm/java/lib/tools.jar
  Nov 21 09:49:07 ipa-server01 server[1199252]: options used: -Dcatalina.base=/var/lib/pki/pki-tomcat -Dcatalina.home=/usr/share/tomcat -Djava.endorsed.dirs= -Djava.io.tmpdir=/var/lib/pki/pki-tomcat/temp -Djava.util.logging.config.file=/var/lib/pki/pki-tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager     -Djava.security.manager     -Djava.security.policy==/var/lib/pki/pki-tomcat/conf/catalina.policy
  Nov 21 09:50:37 ipa-server01 systemd[1]: pki-tomcatd@pki-tomcat.service: Start-post operation timed out. Stopping.
  Nov 21 09:50:37 ipa-server01 systemd[1]: pki-tomcatd@pki-tomcat.service: Failed with result 'timeout'.
  Nov 21 09:50:37 ipa-server01 systemd[1]: Failed to start PKI Tomcat Server pki-tomcat.
  Nov 21 09:50:37 ipa-server01 systemd[1]: Reached target PKI Tomcat Server.
  Nov 22 09:05:33 ipa-server01 systemd[1]: Stopped target PKI Tomcat Server.