Installation time via subpackage very slow

[lukasbeck]

We are facing very slow installation times when installing accesscontroltool-package and accesscontroltool-oakindex-package via subpackages. When installing the content package onto AEM 6.5.11 (on-premise), we sometimes wait up to minutes until the installation of the accesscontroltool-package is complete. From the logs we see that the OsgiInstallerHook waits a long time.
Examples:

18.02.2022 10:17:33.355 *INFO* [qtp509513024-251] org.apache.sling.installer.provider.installhook.OsgiInstallerHook Waited 54070ms in total for OSGi events to become quiet (for at least 5sec)

18.02.2022 10:28:54.154 *INFO* [qtp1329713234-6505] org.apache.sling.installer.provider.installhook.OsgiInstallerHook Waited 121830ms in total for OSGi events to become quiet (for at least 5sec)

We use the following configuration to create the package for installation:

            <plugin>
                <groupId>org.apache.jackrabbit</groupId>
                <artifactId>filevault-package-maven-plugin</artifactId>
                <configuration>
                    <allowIndexDefinitions>true</allowIndexDefinitions>
                    <embeddeds>
                        <embedded>
                           (client-specific dependency)
                        </embedded>
                        <embedded>
                            <artifactId>jsoup</artifactId>
                            <groupId>org.jsoup</groupId>
                            <target>/apps/client/thirdparties/install</target>
                        </embedded>
                        <embedded>
                            <groupId>org.apache.servicemix.bundles</groupId>
                            <artifactId>org.apache.servicemix.bundles.libphonenumber</artifactId>
                            <target>/apps/client/thirdparties/install</target>
                        </embedded>
                        <embedded>
                            <groupId>org.apache.sling</groupId>
                            <artifactId>org.apache.sling.commons.clam</artifactId>
                            <target>/apps/client/thirdparties/install</target>
                        </embedded>
                        <embedded>
                            <groupId>org.apache.commons</groupId>
                            <artifactId>commons-text</artifactId>
                            <target>/apps/client/thirdparties/install</target>
                        </embedded>
                        <embedded>
                            <artifactId>unirest-java</artifactId>
                            <groupId>com.mashape.unirest</groupId>
                            <target>/apps/client/thirdparties/install</target>
                        </embedded>
                    </embeddeds>
                    <subPackages>
                        <subPackage>
                            (client-specific content package)
                        </subPackage>
                        <subPackage>
                            <groupId>com.adobe.acs</groupId>
                            <artifactId>acs-aem-commons-content</artifactId>
                            <filter>true</filter>
                        </subPackage>
                        <subPackage>
                            <groupId>biz.netcentric.cq.tools.accesscontroltool</groupId>
                            <artifactId>accesscontroltool-package</artifactId>
                            <filter>true</filter>
                        </subPackage>
                        <subPackage>
                            <groupId>biz.netcentric.cq.tools.accesscontroltool</groupId>
                            <artifactId>accesscontroltool-oakindex-package</artifactId>
                            <filter>true</filter>
                        </subPackage>
                    </subPackages>
                </configuration>
            </plugin>

Is this a known issue? Is there something we can do to improve the installation time? We prefer having the installation of the access control tool automated instead of manually installing it once.