Candlepin Init fails on new install

Problem:
On a brand new installation of foreman (scenario katello) the process fails when trying to initialize candlepin for the first time. The exact point is this one:
'/usr/bin/wget --no-proxy --timeout=30 --tries=40 --wait=20 --retry-connrefused -qO- http://localhost:8080/candlepin/admin/init > /var/log/candlepin/cpinit.log 2>&1 && touch /var/lib/candlepin/cpinit_done' returned 4 instead of one of [0]

My guess is that tomcat is not ready yet.
When I do the exact same wget call after the installer failed I am getting a 200 back from tomcat stating: ‘Already initialized.’.

Expected outcome:
Wget returns with exitcode 0 and the foreman-installer finishes successfully.

Foreman and Proxy versions:
Foreman 1.20
Katello 3.10

Details below:

tfm-rubygem-hammer_cli_foreman-0.15.1-1.el7.noarch
tfm-rubygem-foreman_docker-4.1.0-2.fm1_20.el7.noarch
rubygem-foreman_maintain-0.3.0-1.el7.noarch
tfm-rubygem-hammer_cli_foreman_bootdisk-0.1.3-7.el7.noarch
foreman-postgresql-1.20.2-1.el7.noarch
tfm-rubygem-hammer_cli_foreman_tasks-0.0.13-1.fm1_20.el7.noarch
foreman-1.20.2-1.el7.noarch
tfm-rubygem-foreman-tasks-0.14.3-1.fm1_20.el7.noarch
vlt01429.adm.cloud.itzbund.net-foreman-proxy-1.0-1.noarch
tfm-rubygem-foreman-tasks-core-0.2.5-2.fm1_20.el7.noarch
tfm-rubygem-hammer_cli_foreman_docker-0.0.4-4.el7.noarch
foreman-release-scl-7-2.el7.noarch
foreman-debug-1.20.2-1.el7.noarch
foreman-installer-1.20.2-1.el7.noarch
foreman-installer-katello-3.10.0-1.el7.noarch
vlt01429.adm.cloud.itzbund.net-foreman-client-1.0-1.noarch
vlt01429.adm.cloud.itzbund.net-foreman-proxy-client-1.0-1.noarch
foreman-cli-1.20.2-1.el7.noarch
foreman-selinux-1.20.2-1.el7.noarch
foreman-proxy-1.20.2-1.el7.noarch
foreman-compute-1.20.2-1.el7.noarch
katello-certs-tools-2.4.0-1.el7.noarch
katello-default-ca-1.0-1.noarch
katello-selinux-3.0.3-1.el7.noarch
katello-server-ca-1.0-1.noarch
katello-installer-base-3.10.0-1.el7.noarch
katello-client-bootstrap-1.6.0-1.el7.noarch
katello-common-3.10.0-7.el7.noarch
pulp-katello-1.0.2-1.el7.noarch
katello-service-3.10.0-7.el7.noarch
foreman-installer-katello-3.10.0-1.el7.noarch
katello-debug-3.10.0-7.el7.noarch
tfm-rubygem-hammer_cli_katello-0.16.0-1.el7.noarch
katello-3.10.0-7.el7.noarch
tfm-rubygem-katello-3.10.0-1.el7.noarch

Other relevant data:
Related topic: candlepin-error-on-fresh-install-regarding-certs
(But this is related to certificate errors which I dont have)

logs
Full stacktrace here:

`[root@ourbox ~]# foreman-installer --scenario katello --foreman-initial-organization "Our_Playground" --foreman-initial-location "Frankfurt" --foreman-admin-first-name Katello --foreman-admin-last-name Administrator --foreman-admin-username kat-admin --foreman-admin-password 'xxxxxxxxx' --foreman-proxy-tftp false --katello-proxy-url http://proxy.ourcompany.de --katello-proxy-port 3128 --foreman-proxy-bind-host '*' --puppet-server false --foreman-proxy-puppet false --foreman-proxy-puppetca false --no-enable-puppet`


`Resetting puppet server version param...
 '/usr/bin/wget --no-proxy --timeout=30 --tries=40 --wait=20 --retry-connrefused -qO- http://localhost:8080/candlepin/admin/init > /var/log/candlepin/cpinit.log 2>&1 && touch /var/lib/candlepin/cpinit_done' returned 4 instead of one of [0]
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/errors.rb:157:in `fail'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/type/exec.rb:164:in `sync'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:236:in `sync'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:134:in `sync_if_needed'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:88:in `block in perform_changes'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:87:in `each'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:87:in `perform_changes'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:21:in `evaluate'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:257:in `apply'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:277:in `eval_resource'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:181:in `call'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:181:in `block (2 levels) in evaluate'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:515:in `block in thinmark'
/opt/puppetlabs/puppet/lib/ruby/2.4.0/benchmark.rb:308:in `realtime'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:514:in `thinmark'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:181:in `block in evaluate'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/graph/relationship_graph.rb:121:in `traverse'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:171:in `evaluate'
/usr/share/gems/gems/kafo-2.1.0/modules/kafo_configure/lib/puppet/parser/functions/add_progress.rb:30:in `evaluate_with_trigger'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:239:in `block (2 levels) in apply'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:515:in `block in thinmark'
/opt/puppetlabs/puppet/lib/ruby/2.4.0/benchmark.rb:308:in `realtime'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:514:in `thinmark'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:238:in `block in apply'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/log.rb:156:in `with_destination'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/report.rb:146:in `as_logging_destination'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:237:in `apply'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:186:in `block (2 levels) in apply_catalog'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:515:in `block in thinmark'
/opt/puppetlabs/puppet/lib/ruby/2.4.0/benchmark.rb:308:in `realtime'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:514:in `thinmark'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:185:in `block in apply_catalog'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:232:in `block in benchmark'
/opt/puppetlabs/puppet/lib/ruby/2.4.0/benchmark.rb:308:in `realtime'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:231:in `benchmark'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:184:in `apply_catalog'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:369:in `run_internal'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:237:in `block in run'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/context.rb:65:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet.rb:260:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:211:in `run'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application/apply.rb:354:in `apply_catalog'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application/apply.rb:280:in `block (2 levels) in main'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/context.rb:65:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet.rb:260:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application/apply.rb:280:in `block in main'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/context.rb:65:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet.rb:260:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application/apply.rb:233:in `main'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application/apply.rb:174:in `run_command'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application.rb:375:in `block in run'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:663:in `exit_on_fail'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application.rb:375:in `run'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/command_line.rb:136:in `run'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/command_line.rb:73:in `execute'
/opt/puppetlabs/puppet/bin/puppet:5:in `<main>'
 /Stage[main]/Candlepin::Service/Exec[cpinit]/returns: change from 'notrun' to ['0'] failed: '/usr/bin/wget --no-proxy --timeout=30 --tries=40 --wait=20 --retry-connrefused -qO- http://localhost:8080/candlepin/admin/init > /var/log/candlepin/cpinit.log 2>&1 && touch /var/lib/candlepin/cpinit_done' returned 4 instead of one of [0]
 /Stage[main]/Candlepin::Service/Exec[cpinit]: Failed to call refresh: '/usr/bin/wget --no-proxy --timeout=30 --tries=40 --wait=20 --retry-connrefused -qO- http://localhost:8080/candlepin/admin/init > /var/log/candlepin/cpinit.log 2>&1 && touch /var/lib/candlepin/cpinit_done' returned 4 instead of one of [0]
 /Stage[main]/Candlepin::Service/Exec[cpinit]: '/usr/bin/wget --no-proxy --timeout=30 --tries=40 --wait=20 --retry-connrefused -qO- http://localhost:8080/candlepin/admin/init > /var/log/candlepin/cpinit.log 2>&1 && touch /var/lib/candlepin/cpinit_done' returned 4 instead of one of [0]
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/errors.rb:157:in `fail'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/type/exec.rb:164:in `sync'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/type/exec.rb:604:in `refresh'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/event_manager.rb:147:in `process_callback'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/event_manager.rb:34:in `block in process_events'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/event_manager.rb:119:in `block in queued_events'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/event_manager.rb:118:in `each'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/event_manager.rb:118:in `queued_events'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/event_manager.rb:33:in `process_events'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:278:in `eval_resource'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:181:in `call'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:181:in `block (2 levels) in evaluate'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:515:in `block in thinmark'
/opt/puppetlabs/puppet/lib/ruby/2.4.0/benchmark.rb:308:in `realtime'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:514:in `thinmark'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:181:in `block in evaluate'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/graph/relationship_graph.rb:121:in `traverse'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction.rb:171:in `evaluate'
/usr/share/gems/gems/kafo-2.1.0/modules/kafo_configure/lib/puppet/parser/functions/add_progress.rb:30:in `evaluate_with_trigger'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:239:in `block (2 levels) in apply'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:515:in `block in thinmark'
/opt/puppetlabs/puppet/lib/ruby/2.4.0/benchmark.rb:308:in `realtime'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:514:in `thinmark'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:238:in `block in apply'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/log.rb:156:in `with_destination'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/transaction/report.rb:146:in `as_logging_destination'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:237:in `apply'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:186:in `block (2 levels) in apply_catalog'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:515:in `block in thinmark'
/opt/puppetlabs/puppet/lib/ruby/2.4.0/benchmark.rb:308:in `realtime'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:514:in `thinmark'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:185:in `block in apply_catalog'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:232:in `block in benchmark'
/opt/puppetlabs/puppet/lib/ruby/2.4.0/benchmark.rb:308:in `realtime'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:231:in `benchmark'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:184:in `apply_catalog'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:369:in `run_internal'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:237:in `block in run'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/context.rb:65:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet.rb:260:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/configurer.rb:211:in `run'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application/apply.rb:354:in `apply_catalog'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application/apply.rb:280:in `block (2 levels) in main'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/context.rb:65:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet.rb:260:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application/apply.rb:280:in `block in main'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/context.rb:65:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet.rb:260:in `override'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application/apply.rb:233:in `main'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application/apply.rb:174:in `run_command'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application.rb:375:in `block in run'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util.rb:663:in `exit_on_fail'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/application.rb:375:in `run'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/command_line.rb:136:in `run'
/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/command_line.rb:73:in `execute'
/opt/puppetlabs/puppet/bin/puppet:5:in `<main>'
Installing             Done                                               [100%] [..........................................................................................................................................................]
  Something went wrong! Check the log for ERROR-level output
  The full log is at /var/log/foreman-installer/katello.log
yum install -y -q rh-mongodb34-syspaths finished successfully!`

For this one I can answer my own question:

At some point it was mentioned ipv6 needs to be disabled. So I’ve disabled it in /etc/default/grub.
BUT: If it is disabled there and you still have an existing host entry for IPV6(especially for localhost) it causes the crash.

Solution:
remove existing ipv6 host entries in /etc/hosts related to your local host
e.g. ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

this guy pointed me in the right direction:
Bug 1373235 Installation fails on RHEL 7.2 fully updated

On current versions disabling IPv6 shouldn’t be needed anymore and the goal is to actually make it work well without IPv6 disabled.