Getting java.lang.UnsatisfiedLinkError /layers/paketo-buildpacks_microsoft-openjdk/jdk/lib/libfontmanager.so: libfreetype.so.6: cannot open shared object file: No such file or directory

[amardev06]

Expected Behavior

Should not get initialization error.

Current Behavior

We are currently migrating our spring boot application to AKS and using paketo buildpacks to create container image. For openjdk, we are using gcr.io/paketo-buildpacks/microsoft-openjdk. Our Azure DevOps pipeline creates container image using spring boot command “mvn spring-boot:build-image”.

Here is the “spring-boot-maven-plugin” config:

<plugin>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-maven-plugin</artifactId>
	<configuration>
		<image>
			<buildpacks>
				<buildpack>gcr.io/paketo-buildpacks/ca-certificates:${paketo-bp-ca-cert.version}</buildpack>
				<buildpack>gcr.io/paketo-buildpacks/microsoft-openjdk:${paketo-bp-ms-openjdk.version}</buildpack>
				<buildpack>gcr.io/paketo-buildpacks/syft:${paketo-bp-syft.version}</buildpack>
				<buildpack>gcr.io/paketo-buildpacks/executable-jar:${paketo-bp-exe-jar.version}</buildpack>
				<buildpack>gcr.io/paketo-buildpacks/dist-zip:${paketo-bp-dist-zip.version}</buildpack>
				<buildpack>gcr.io/paketo-buildpacks/spring-boot:${paketo-bp-spring-boot.version}</buildpack>
				<buildpack>gcr.io/paketo-buildpacks/azure-application-insights:${paketo-bp-az-app-insights.version}</buildpack>
			</buildpacks>
			<createdDate>now</createdDate>
			<bindings>
				<binding>
					${project.basedir}/appinsights:/platform/bindings/application-insights
				</binding>
			</bindings>
		</image>
	</configuration>
</plugin>

This spring-boot application uses jasper reports to create pdfs and during creation we are hitting below error:

[dispatcherServlet]: Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed: java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11FontManager] with root cause
java.lang.ExceptionInInitializerError: Exception java.lang.UnsatisfiedLinkError: /layers/paketo-buildpacks_microsoft-openjdk/jdk/lib/libfontmanager.so: libfreetype.so.6: cannot open shared object file: No such file or directory [in thread "http-nio-8080-exec-6"]
	at java.base/jdk.internal.loader.NativeLibraries.load(Native Method)

Steps to Reproduce

Our build process runs with Java 17, Spring boot 3.2 on Ubuntu Linux and we use “mvn spring-boot:build-image” command to create the image. See above the definition of 'spring-boot-maven-plugin'

[amardev06]

Found the below reference. Looks like libfreetype.so is not bundled with linux jdks anymore. Will try to find alternative.

microsoft/openjdk#616 (comment)

[dmikusa]

Yes, and the Jammy base images provided by Paketo do not include these libraries by default either. There are a handful of ways you can work around this, which I've documented here. I would suggest #4 from that last, which is using the apt-buildpack.