PDF to DCOX Java Null Pointer Exception

BobM56 · August 16, 2021, 4:25pm

Hello,

I’m getting a null pointer exception when saving a PDF to DOCX using the com.aspose.pdf.Document.save() method. This worked fine in Java 8 but fails in Java 11. Specifically, the AWS Lambda Java 11 (Corretto) runtime. I suspect it’s related to Java 11 not including additional fonts, but I don’t see how to address this using com.aspose.pdf package. The stack traceis below.

Thanks,
Bob

java.lang.reflect.InvocationTargetException: java.lang.InternalError
java.lang.InternalError: java.lang.reflect.InvocationTargetException
at java.desktop/sun.font.FontManagerFactory$1.run(Unknown Source)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.desktop/sun.font.FontManagerFactory.getInstance(Unknown Source)
at java.desktop/sun.java2d.SunGraphicsEnvironment.getFontManagerForSGE(Unknown Source)
at java.desktop/sun.java2d.SunGraphicsEnvironment.getAllFonts(Unknown Source)
at java.desktop/sun.java2d.HeadlessGraphicsEnvironment.getAllFonts(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v.lk(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v.(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v.(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v$2.lI(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v$2.lf(Unknown Source)
at com.aspose.pdf.internal.l13p.lI.lb(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v.lj(Unknown Source)
at com.aspose.pdf.internal.l4k.lI.lI(Unknown Source)
at com.aspose.pdf.internal.l4y.l1h.lc(Unknown Source)
at com.aspose.pdf.internal.l4y.l1h.l1h(Unknown Source)
at com.aspose.pdf.internal.l3p.lI.lI(Unknown Source)
at com.aspose.pdf.internal.l3p.lj.lI(Unknown Source)
at com.aspose.pdf.internal.l2u.lu.lj(Unknown Source)
at com.aspose.pdf.internal.l2u.lu.lb(Unknown Source)
at com.aspose.pdf.internal.l2u.lu.lf(Unknown Source)
at com.aspose.pdf.internal.l2u.lu.lf(Unknown Source)
at com.aspose.pdf.l12f.lI(Unknown Source)
at com.aspose.pdf.l12f.lb(Unknown Source)
at com.aspose.pdf.ApsUsingConverter.lI(Unknown Source)
at com.aspose.pdf.ApsUsingConverter.lf(Unknown Source)
at com.aspose.pdf.l4j.lI(Unknown Source)
at com.aspose.pdf.ADocument.lj(Unknown Source)
at com.aspose.pdf.ADocument.lI(Unknown Source)
at com.aspose.pdf.Document.lI(Unknown Source)
at com.aspose.pdf.ADocument.lI(Unknown Source)
at com.aspose.pdf.ADocument.save(Unknown Source)
at com.aspose.pdf.Document.save(Unknown Source)
at com.elsevier.scival.lambda.Handler.convertPdfToDocx(Handler.java:250)
at com.elsevier.scival.lambda.Handler.handleRequest(Handler.java:143)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
… 39 more
Caused by: java.lang.NullPointerException
at java.desktop/sun.awt.FontConfiguration.getVersion(Unknown Source)
at java.desktop/sun.awt.FontConfiguration.readFontConfigFile(Unknown Source)
at java.desktop/sun.awt.FontConfiguration.init(Unknown Source)
at java.desktop/sun.awt.X11FontManager.createFontConfiguration(Unknown Source)
at java.desktop/sun.font.SunFontManager$2.run(Unknown Source)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.desktop/sun.font.SunFontManager.(Unknown Source)
at java.desktop/sun.awt.FcFontManager.(Unknown Source)
at java.desktop/sun.awt.X11FontManager.(Unknown Source)
… 43 more

asad.ali · August 16, 2021, 11:54pm

@BobM56

Can you please share a sample PDF document for our reference so that we can investigate the scenario further?

BobM56 · August 17, 2021, 11:27am

Here’s an example.

failed-example.pdf (19.4 KB)

asad.ali · August 17, 2021, 6:03pm

@BobM56

We have logged an investigation ticket in our issue tracking system to further analyze this issue. Meanwhile, can you please try using FontRepository.setLocalFontPaths() method to include the additional font directories for the API to scan during conversion? We will further look into this matter and let you know as soon as the ticket is resolved.

BobM56 · August 17, 2021, 8:14pm

Using setLocalFontPaths has a similar result (null pointer, see below). Again, feels like the underlying problem is fonts no longer in Java 11 and not properly set in the runtime environment, AWS Lambda Java 11 (Corretto). Btw, I’m using aspose-pdf-21.7.jar

java.lang.reflect.InvocationTargetException: java.lang.InternalError
java.lang.InternalError: java.lang.reflect.InvocationTargetException
at java.desktop/sun.font.FontManagerFactory$1.run(Unknown Source)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.desktop/sun.font.FontManagerFactory.getInstance(Unknown Source)
at java.desktop/sun.java2d.SunGraphicsEnvironment.getFontManagerForSGE(Unknown Source)
at java.desktop/sun.java2d.SunGraphicsEnvironment.getAllFonts(Unknown Source)
at java.desktop/sun.java2d.HeadlessGraphicsEnvironment.getAllFonts(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v.lk(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v.(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v.(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v$2.lI(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v$2.lf(Unknown Source)
at com.aspose.pdf.internal.l13p.lI.lb(Unknown Source)
at com.aspose.pdf.internal.l4y.l0v.lj(Unknown Source)
at com.aspose.pdf.FontRepository.addLocalFontPath(Unknown Source)
at com.aspose.pdf.FontRepository.setLocalFontPaths(Unknown Source)
at com.elsevier.scival.lambda.Handler.installFonts(Handler.java:338)
at com.elsevier.scival.lambda.Handler.handleRequest(Handler.java:103)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
… 21 more
Caused by: java.lang.NullPointerException
at java.desktop/sun.awt.FontConfiguration.getVersion(Unknown Source)
at java.desktop/sun.awt.FontConfiguration.readFontConfigFile(Unknown Source)
at java.desktop/sun.awt.FontConfiguration.init(Unknown Source)
at java.desktop/sun.awt.X11FontManager.createFontConfiguration(Unknown Source)
at java.desktop/sun.font.SunFontManager$2.run(Unknown Source)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.desktop/sun.font.SunFontManager.(Unknown Source)
at java.desktop/sun.awt.FcFontManager.(Unknown Source)
at java.desktop/sun.awt.X11FontManager.(Unknown Source)
… 25 more

asad.ali · August 18, 2021, 7:44pm

@BobM56

We have updated the information of the logged ticket i.e. PDFJAVA-40786. We will look into its details and let you know as soon as it is resolved. Please be patient and spare us some time.

We are sorry for the inconvenience.

BobM56 · August 25, 2021, 6:49pm

Just in case you haven’t seen it, this topic appears to be relevant to my problem:

github.com/corretto/corretto-11

Broken Font support (Fontconfig) in AWS-Lambda (java11)

opened 04:42PM - 05 Jul 20 UTC

closed 11:50PM - 09 Sep 22 UTC

ggrandes

### Describe the bug Broken Font support in Corretto-11 on AWS-Lambda. This b…ug is similar to [#95] and [corretto/corretto-8/issues/64]. With no known workaround. ### To Reproduce In [AWS-Lambda console](https://console.aws.amazon.com/lambda/home) 1. Create function, _author from scratch_: Name=```FontSupport```, Runtime=```Java 11``` 2. In Function code (actions): Upload .zip file: [fontsupport-1.0.0-shaded.zip](https://github.com/corretto/corretto-11/files/4875244/fontsupport-1.0.0-shaded.zip) 3. Basic Setting: Handler=```mytest.FontSupport::handleRequest``` 3. Configure new test event, only ```"test"``` as content and run **Test** button. This is the [source code](https://github.com/ggrandes-clones/fontsupport) for reference: ```java package mytest; import java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics; import java.awt.image.BufferedImage; import com.amazonaws.services.lambda.runtime.Context; import com.amazonaws.services.lambda.runtime.RequestHandler; /* <dependency> <groupId>com.amazonaws</groupId> <artifactId>aws-lambda-java-core</artifactId> <version>1.2.1</version> </dependency> <dependency> <groupId>com.amazonaws</groupId> <artifactId>aws-lambda-java-events</artifactId> <version>3.1.0</version> </dependency> */ public class FontSupport implements RequestHandler<String, String> { @Override public String handleRequest(final String input, final Context context) { try { return "OK:" + test(); } catch (Throwable e) { e.printStackTrace(); return String.valueOf(e) + "\n" + ("SystemProperties: " + System.getProperties()); } } private int test() { final BufferedImage canvas = new BufferedImage(5, 5, BufferedImage.TYPE_INT_RGB); final Graphics graphics = canvas.getGraphics(); final Font font = new Font("Verdana", Font.PLAIN, 110); final FontMetrics metrics = graphics.getFontMetrics(font); // Crash!! final int maxAdvance = metrics.getMaxAdvance(); System.out.println("MaxAdvance: " + metrics.getMaxAdvance()); return maxAdvance; } } ``` ### Expected behavior * Result in lambda console: ```"OK:number"``` * Log output: ```MaxAdvance: number```, without any java.lang.Exceptions ### StackTrace ``` START RequestId: 511c3a60-4046-4fac-9046-29ce8cdda2b7 Version: $LATEST java.lang.InternalError: java.lang.reflect.InvocationTargetException at java.desktop/sun.font.FontManagerFactory$1.run(Unknown Source) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.desktop/sun.font.FontManagerFactory.getInstance(Unknown Source) at java.desktop/sun.font.SunFontManager.getInstance(Unknown Source) at java.desktop/sun.font.FontDesignMetrics.getMetrics(Unknown Source) at java.desktop/sun.java2d.SunGraphics2D.getFontMetrics(Unknown Source) at mytest.FontSupport.test(FontSupport.java:38) at mytest.FontSupport.handleRequest(FontSupport.java:27) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) at lambdainternal.EventHandlerLoader$PojoMethodRequestHandler.handleRequest(EventHandlerLoader.java:280) at lambdainternal.EventHandlerLoader$PojoHandlerAsStreamHandler.handleRequest(EventHandlerLoader.java:197) at lambdainternal.EventHandlerLoader$2.call(EventHandlerLoader.java:897) at lambdainternal.AWSLambda.startRuntime(AWSLambda.java:228) at lambdainternal.AWSLambda.startRuntime(AWSLambda.java:162) at lambdainternal.AWSLambda.main(AWSLambda.java:157) Caused by: java.lang.reflect.InvocationTargetException at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source) ... 18 more Caused by: java.lang.NullPointerException at java.desktop/sun.awt.FontConfiguration.getVersion(Unknown Source) at java.desktop/sun.awt.FontConfiguration.readFontConfigFile(Unknown Source) at java.desktop/sun.awt.FontConfiguration.init(Unknown Source) at java.desktop/sun.awt.X11FontManager.createFontConfiguration(Unknown Source) at java.desktop/sun.font.SunFontManager$2.run(Unknown Source) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.desktop/sun.font.SunFontManager.<init>(Unknown Source) at java.desktop/sun.awt.FcFontManager.<init>(Unknown Source) at java.desktop/sun.awt.X11FontManager.<init>(Unknown Source) ... 22 more END RequestId: 511c3a60-4046-4fac-9046-29ce8cdda2b7 ``` ### Platform information ```json { "awt.toolkit": "sun.awt.X11.XToolkit", "java.specification.version": "11", "java.class.path": "/var/runtime/lib/aws-lambda-java-core-1.2.0.jar:/var/runtime/lib/aws-lambda-java-runtime-0.2.0.jar:/var/runtime/lib/aws-lambda-java-serialization-0.2.0.jar", "java.vm.vendor": "Amazon.com Inc.", "java.vendor.url": "https://aws.amazon.com/corretto/", "os.name": "Linux", "sun.boot.library.path": "/var/lang/lib", "sun.java.command": "lambdainternal.AWSLambda", "java.version.date": "2020-04-14", "java.home": "/var/lang", "java.vm.compressedOopsMode": "32-bit", "java.specification.name": "Java Platform API Specification", "java.vm.specification.vendor": "Oracle Corporation", "java.awt.graphicsenv": "sun.awt.X11GraphicsEnvironment", "sun.management.compiler": "HotSpot 64-Bit Tiered Compilers", "java.runtime.version": "11.0.7+10-LTS", "os.version": "4.14.165-102.205.amzn2.x86_64", "java.runtime.name": "OpenJDK Runtime Environment", "java.vm.name": "OpenJDK 64-Bit Server VM", "java.vendor.version": "Corretto-11.0.7.10.1", "java.vendor.url.bug": "https://github.com/corretto/corretto-11/issues/", "java.version": "11.0.7", "user.dir": "/var/task", "os.arch": "amd64", "java.vm.specification.name": "Java Virtual Machine Specification", "sun.os.patch.level": "unknown", "java.library.path": "/var/lang/lib:/lib64:/usr/lib64:/var/runtime:/var/runtime/lib:/var/task:/var/task/lib:/opt/lib:/usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib", "java.vendor": "Amazon.com Inc.", "java.vm.info": "mixed mode, sharing", "java.vm.version": "11.0.7+10-LTS", "sun.io.unicode.encoding": "UnicodeLittle", } ``` ### Additional context - This code was tested on AWS-Lambda (2020-07-05), using runtime: Java 8 (run without problem) and Java 11 (fail). - This [workaround](https://github.com/corretto/corretto-11/issues/53#issuecomment-629166508) don't works in this case.

asad.ali · August 26, 2021, 8:33pm

@BobM56

We will surely investigate the ticket from this perspective and let you know as soon as we have some updates regarding its resolution. Please give us some time.