Incorrect export of `com.fasterxml.jackson.jaxrs.json` for JSON provider

[triceo]

When running an app with 2.10.1 using JPMS, I get the following error:

Error occurred during initialization of boot layer
java.lang.module.FindException: Error reading module: 
/home/triceo/.m2/repository/com/fasterxml/jackson/jaxrs/jackson-jaxrs-json-provider/2.10.1/jackson-jaxrs-json-provider-2.10.1.jar
Caused by: java.lang.module.InvalidModuleDescriptorException: Exported package com.fasterxml.jackson.jaxrs.json already declared

I am assuming this has to do with the following module-info.class that my IntelliJ IDEA decompiled for me:

(See lines 15 and 16.)

Unfortunately, this makes Jackson 2.10.1 unusable in the context of Java modularity.

[triceo]

FYI @cowtowncoder
(#114 was fixed in 2.10.1, so I was able to proceed and find this one.)

[cowtowncoder]

Would this be fixed by this:

#119

?

[cowtowncoder]

And yes, I was right from beginning. I FUCKING HATE Oracle's piece of shit module system.

Was probably bad move to try to support it.

[triceo]

Is there a nightly build somewhere that I could try?

[cowtowncoder]

Sonatype OSS repo has some of the snapshots, but looks like Travis settings for this project have not been updated to build them (unlike core projects). I can do manual deploy from home tonight

[triceo]

@cowtowncoder That would be appreciated - I will test it then.

[paperlib]

Same error pops up when trying to list dependencies via jdeps:

$ jdeps --list-deps ./jackson-jaxrs-json-provider-2.10.1.jar
Exception in thread "main" java.lang.module.FindException:
  Error reading module: ./jackson-jaxrs-json-provider-2.10.1.jar
Caused by: java.lang.module.InvalidModuleDescriptorException:
  Exported package com.fasterxml.jackson.jaxrs.json already declared

full error dump:

$ jdeps --list-deps ./jackson-jaxrs-json-provider-2.10.1.jar
 Exception in thread "main" java.lang.module.FindException: Error reading module: ./jackson-jaxrs-json-provider-2.10.1.jar
	at java.base/jdk.internal.module.ModulePath.readModule(ModulePath.java:349)
	at java.base/jdk.internal.module.ModulePath.scan(ModulePath.java:236)
	at java.base/jdk.internal.module.ModulePath.scanNextEntry(ModulePath.java:189)
	at java.base/jdk.internal.module.ModulePath.findAll(ModulePath.java:165)
	at jdk.jdeps/com.sun.tools.jdeps.JdepsConfiguration$Builder.build(JdepsConfiguration.java:536)
	at jdk.jdeps/com.sun.tools.jdeps.JdepsTask.buildConfig(JdepsTask.java:589)
	at jdk.jdeps/com.sun.tools.jdeps.JdepsTask.run(JdepsTask.java:543)
	at jdk.jdeps/com.sun.tools.jdeps.JdepsTask.run(JdepsTask.java:519)
	at jdk.jdeps/com.sun.tools.jdeps.Main.main(Main.java:49)
Caused by: java.lang.module.InvalidModuleDescriptorException: Exported package com.fasterxml.jackson.jaxrs.json already declared
	at java.base/jdk.internal.module.ModuleInfo.invalidModuleDescriptor(ModuleInfo.java:1092)
	at java.base/jdk.internal.module.ModuleInfo.read(ModuleInfo.java:134)
	at java.base/jdk.internal.module.ModulePath.readJar(ModulePath.java:651)
	at java.base/jdk.internal.module.ModulePath.readModule(ModulePath.java:330)
	... 8 more

[jflefebvre06]

Same problem

[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  8.119 s
[INFO] Finished at: 2019-11-20T12:07:51+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project ant-tasks: Execution default-compile of goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile failed: Exported package com.fasterxml.jackson.jaxrs.json already declared -> [Help 1]

[robinvanpraet]

It is causing issues on my side as well. I don't even know how you managed to compile this?!?
Please fix asap

[tomdw]

Same problem here, it is not the module system which is to blame. Just an invalid module-info with a duplicate export package. Please fix asap indeed, blocking.

[kupci]

@robinvanpraet @tomdw Knowing that nothing annoys cowtowncoder more than people ordering him what to do with his free time, I'm curious if you've considered subscribing for Enterprise Support, which looks like just the sort of thing to address these sorts of issues?

Enterprise support

_Available as part of the Tidelift Subscription.

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[rolaca11]

This issue is fixed with the 2.11.0-SNAPSHOT version and 3.0.0-SNAPSHOT version.

It's not ideal to use snapshots, but it seems to work nicely on my end

[cowtowncoder]

Yes, comments about "Fix this IMMEDIATELY" are annoying and frustrating. I literally do not work for any of you, nor do I take orders from you. I do however work with community members who will try to help; thank you everyone who has contributed in positive way.

As to fix this should be resolved in 2.10.2 as far as I know, and release should be forthcoming within a week or so. If anyone wants to help, verification with a build from 2.10 branch would be good idea, but if and when 2.11 works (as per @rolaca11 ) 2.10.2 should be good too.

[cowtowncoder]

2.10.2 now released.