wait until recommended java installation is available for deb packages

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+### Fixed
+- Wait until recommended java installation is available for deb packages
+
 ## [2.1.0] - 2020-06-18
 ### Added
 - Option to configure jvm parameter of docker container with env JAVA_OPTS or with arguments ([#1175](https://github.com/scm-manager/scm-manager/pull/1175))

scm-packaging/deb/src/main/deb/control/postinst

@@ -36,4 +36,8 @@ systemctl daemon-reload
 
 # enable and start the service
 sudo systemctl enable scm-server
-sudo systemctl start scm-server
+
+# we start scm-manager after 5 seconds
+# this is required, because if we install scm-manager with recommend java
+# java is not fully setup if we ran our posint script
+echo "sleep 5; sudo systemctl start scm-server" | at now