Null Pointer exception when building docker file from NetBeans

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Null Pointer exception when building docker file from NetBeans



This is a simple Maven project created with NetBeans and a simple


System.out.println("hello world");



in the main class.



Docker is running and available as a service in NetBeans.



The Docker file is:


FROM anapsix/alpine-java:latest
copy target/TestDocker-1.0-SNAPSHOT.jar .
CMD ["java","-jar", "TestDocker-1.0-SNAPSHOT.jar"]



When building the file, the error is:


java.lang.NullPointerException
at org.netbeans.core.output2.OutWriter.printANSI(OutWriter.java:632)
at org.netbeans.core.output2.OutWriter.print(OutWriter.java:591)
at org.netbeans.core.output2.ErrWriter.print(ErrWriter.java:211)
at org.netbeans.core.output2.ErrWriter.println(ErrWriter.java:165)
at org.netbeans.modules.docker.ui.build2.BuildTask.run(BuildTask.java:200)
at org.netbeans.modules.docker.ui.build2.BuildImageWizard$1.run(BuildImageWizard.java:276)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)





Is that your full Dockerfile? Does it have a FROM instruction?
– DragonAssassin
2 hours ago





I forgot to add the FROM line in the SA question but it was indeed there in my Docker file. Edited the question to add it.
– seinecle
43 secs ago










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