Keys.keyPairFor(SignatureAlgorithm.<whatever>) throws Method threw 'java.lang.NoSuchMethodError' exception.

I’m trying to generate a key pair on the fly in my tests:

// Both throw the same exception
Keys.keyPairFor(SignatureAlgorithm.ES256)
Keys.keyPairFor(SignatureAlgorithm.RS512)

And I get this exception:

java.lang.NoSuchMethodError: io.jsonwebtoken.lang.Classes.invokeStatic(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Class;[Ljava/lang/Object;)Ljava/lang/Object;

	at io.jsonwebtoken.security.Keys.keyPairFor(Keys.java:210)
	at tech.beshu.ror.acl.blocks.rules.impl.JwtAuthRuleTests.shouldAcceptTokenWithValidEllipticCurveSignature(JwtAuthRuleTests.java:120)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

I’m using the latest version:

  compile 'io.jsonwebtoken:jjwt-api:0.10.5'
    runtime 'io.jsonwebtoken:jjwt-impl:0.10.5',
            // Uncomment the next line if you want to use RSASSA-PSS (PS256, PS384, PS512) algorithms:
            'org.bouncycastle:bcprov-jdk15on:1.60',
            'io.jsonwebtoken:jjwt-jackson:0.10.5'

Not sure what I’m doing wrong, as this should work as per documentation, right?

[marcoderama]

I’m not sure if this explains the original issue but this might help others that ended up here for the same/similar problem as @Wouter8.

My package was configured to use jjwt-api 0.10.7. Unit tests ran fine but when the package was used in a larger project, I ran into the same issue with io.jsonwebtoken.lang.Classes.invokeStatic. After many frustrating hours we figured out that the problem was due to some other package bringing in jjwt-0.6.0. Both jjwt-api-0.10.x and jjwt-0.6.0 implement io.jsonwebtoken.lang.Classes but the latter doesn’t have the Classes.invokeStatic method. If jjwt-0.6.0 ends up earlier in your classpath, then its definitions shadow the ones in jjwt-api-0.10.x and you get the NoSuchMethod error.

Our tools (sbt) didn’t flag the conflict because it couldn’t know that jjwt and jjwt-api were “the same thing”.

[ChocolateOverflow]

I’ve figured out that I needed to remove the jjwt dependency and have just the 3 listed in #installation.