build failure for tinkerpop 3.4.0-rc2: API incompatibility?

[sstra...@kyruus.com]

I'm unable to build Tinkerpop 3.4.0-rc2 with mvn clean install. 

The error appears to be

   An API incompatibility was encountered while executing org.apache.maven.plugins:maven-enforcer-plugin:1.4.1:enforce: java.lang.ExceptionInInitializerError: null

Any suggestions?

$ git clone https://github.com/apache/tinkerpop.git

$ git checkout 3.4.0-rc2

$ mvn --version

Apache Maven 3.5.4 (1edded0938998edf8bf061f1ceb3cfdeccf443fe; 2018-06-17T14:33:14-04:00)

Maven home: /opt/maven

Java version: 11, vendor: Oracle Corporation, runtime: /Library/Java/JavaVirtualMachines/jdk-11.jdk/Contents/Home

Default locale: en_US, platform encoding: UTF-8

OS name: "mac os x", version: "10.13.6", arch: "x86_64", family: "mac"

$ mvn clean install

[INFO] Scanning for projects...

[WARNING] The project org.apache.tinkerpop:tinkerpop:pom:3.4.0-SNAPSHOT uses prerequisites which is only intended for maven-plugin projects but not for non maven-plugin projects. For such purposes you should use the maven-enforcer-plugin. See https://maven.apache.org/enforcer/enforcer-rules/requireMavenVersion.html

[INFO] ------------------------------------------------------------------------

[INFO] Reactor Build Order:

[INFO] 

[INFO] Apache TinkerPop                                                   [pom]

[INFO] Apache TinkerPop :: Gremlin Shaded                                 [jar]

[INFO] Apache TinkerPop :: Gremlin Core                                   [jar]

[INFO] Apache TinkerPop :: Gremlin Test                                   [jar]

[INFO] Apache TinkerPop :: TinkerGraph Gremlin                            [jar]

[INFO] Apache TinkerPop :: Gremlin Groovy                                 [jar]

[INFO] Apache TinkerPop :: Gremlin Driver                                 [jar]

[INFO] Apache TinkerPop :: Neo4j Gremlin                                  [jar]

[INFO] Apache TinkerPop :: Gremlin Server                                 [jar]

[INFO] Apache TinkerPop :: Gremlin Javascript                             [jar]

[INFO] Apache TinkerPop :: Gremlin Python                                 [jar]

[INFO] Apache TinkerPop :: Gremlin.Net                                    [pom]

[INFO] Apache TinkerPop :: Gremlin.Net - Source                           [pom]

[INFO] Apache TinkerPop :: Gremlin.Net - Tests                            [pom]

[INFO] Apache TinkerPop :: Hadoop Gremlin                                 [jar]

[INFO] Apache TinkerPop :: Spark Gremlin                                  [jar]

[INFO] Apache TinkerPop :: SPARQL Gremlin                                 [jar]

[INFO] Apache TinkerPop :: Gremlin Console                                [jar]

[INFO] Apache TinkerPop :: Gremlin Archetype                              [pom]

[INFO] Apache TinkerPop :: Archetype - TinkerGraph                        [jar]

[INFO] Apache TinkerPop :: Archetype - Server                             [jar]

[INFO] Apache TinkerPop :: Archetype - DSL                                [jar]

[INFO] Apache TinkerPop :: Gremlin Tools                                  [pom]

[INFO] Apache TinkerPop :: Gremlin Benchmark                              [jar]

[INFO] Apache TinkerPop :: Gremlin Coverage                               [jar]

[INFO] Apache TinkerPop :: Gremlin IO Test                                [jar]

[INFO] 

[INFO] -------------------< org.apache.tinkerpop:tinkerpop >-------------------

[INFO] Building Apache TinkerPop 3.4.0-SNAPSHOT                          [1/26]

[INFO] --------------------------------[ pom ]---------------------------------

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-site-plugin/3.7/maven-site-plugin-3.7.pom

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-site-plugin/3.7/maven-site-plugin-3.7.pom (19 kB at 42 kB/s)

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-site-plugin/3.7/maven-site-plugin-3.7.jar

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-site-plugin/3.7/maven-site-plugin-3.7.jar (134 kB at 1.0 MB/s)

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/3.0.0/maven-clean-plugin-3.0.0.pom

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/3.0.0/maven-clean-plugin-3.0.0.pom (4.8 kB at 73 kB/s)

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/3.0.0/maven-clean-plugin-3.0.0.jar

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/3.0.0/maven-clean-plugin-3.0.0.jar (31 kB at 398 kB/s)

[INFO] 

[INFO] --- maven-clean-plugin:3.0.0:clean (default-clean) @ tinkerpop ---

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/shared/maven-shared-utils/3.0.0/maven-shared-utils-3.0.0.pom

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/shared/maven-shared-utils/3.0.0/maven-shared-utils-3.0.0.pom (5.6 kB at 92 kB/s)

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/shared/maven-shared-components/21/maven-shared-components-21.pom

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/shared/maven-shared-components/21/maven-shared-components-21.pom (5.1 kB at 90 kB/s)

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/maven-parent/25/maven-parent-25.pom

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/maven-parent/25/maven-parent-25.pom (37 kB at 474 kB/s)

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/apache/15/apache-15.pom

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/apache/15/apache-15.pom (15 kB at 224 kB/s)

Downloading from central: https://repo.maven.apache.org/maven2/commons-io/commons-io/2.4/commons-io-2.4.pom

Downloaded from central: https://repo.maven.apache.org/maven2/commons-io/commons-io/2.4/commons-io-2.4.pom (10 kB at 159 kB/s)

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/commons/commons-parent/25/commons-parent-25.pom

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/commons/commons-parent/25/commons-parent-25.pom (48 kB at 653 kB/s)

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/apache/9/apache-9.pom

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/apache/9/apache-9.pom (15 kB at 233 kB/s)

Downloading from central: https://repo.maven.apache.org/maven2/com/google/code/findbugs/jsr305/2.0.1/jsr305-2.0.1.pom

Downloaded from central: https://repo.maven.apache.org/maven2/com/google/code/findbugs/jsr305/2.0.1/jsr305-2.0.1.pom (965 B at 16 kB/s)

Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/shared/maven-shared-utils/3.0.0/maven-shared-utils-3.0.0.jar

Downloading from central: https://repo.maven.apache.org/maven2/com/google/code/findbugs/jsr305/2.0.1/jsr305-2.0.1.jar

Downloading from central: https://repo.maven.apache.org/maven2/commons-io/commons-io/2.4/commons-io-2.4.jar

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/shared/maven-shared-utils/3.0.0/maven-shared-utils-3.0.0.jar (155 kB at 1.3 MB/s)

Downloaded from central: https://repo.maven.apache.org/maven2/com/google/code/findbugs/jsr305/2.0.1/jsr305-2.0.1.jar (32 kB at 176 kB/s)

Downloaded from central: https://repo.maven.apache.org/maven2/commons-io/commons-io/2.4/commons-io-2.4.jar (185 kB at 673 kB/s)

[INFO] 

[INFO] --- maven-enforcer-plugin:1.4.1:enforce (enforce-maven-version) @ tinkerpop ---

[INFO] 

[INFO] --- maven-enforcer-plugin:1.4.1:enforce (enforce-all) @ tinkerpop ---

[INFO] ------------------------------------------------------------------------

[INFO] Reactor Summary:

[INFO] 

[INFO] Apache TinkerPop 3.4.0-SNAPSHOT .................... FAILURE [  2.698 s]

[INFO] Apache TinkerPop :: Gremlin Shaded ................. SKIPPED

[INFO] Apache TinkerPop :: Gremlin Core ................... SKIPPED

[INFO] Apache TinkerPop :: Gremlin Test ................... SKIPPED

[INFO] Apache TinkerPop :: TinkerGraph Gremlin ............ SKIPPED

[INFO] Apache TinkerPop :: Gremlin Groovy ................. SKIPPED

[INFO] Apache TinkerPop :: Gremlin Driver ................. SKIPPED

[INFO] Apache TinkerPop :: Neo4j Gremlin .................. SKIPPED

[INFO] Apache TinkerPop :: Gremlin Server ................. SKIPPED

[INFO] Apache TinkerPop :: Gremlin Javascript ............. SKIPPED

[INFO] Apache TinkerPop :: Gremlin Python ................. SKIPPED

[INFO] Apache TinkerPop :: Gremlin.Net .................... SKIPPED

[INFO] Apache TinkerPop :: Gremlin.Net - Source ........... SKIPPED

[INFO] Apache TinkerPop :: Gremlin.Net - Tests ............ SKIPPED

[INFO] Apache TinkerPop :: Hadoop Gremlin ................. SKIPPED

[INFO] Apache TinkerPop :: Spark Gremlin .................. SKIPPED

[INFO] Apache TinkerPop :: SPARQL Gremlin ................. SKIPPED

[INFO] Apache TinkerPop :: Gremlin Console ................ SKIPPED

[INFO] Apache TinkerPop :: Gremlin Archetype .............. SKIPPED

[INFO] Apache TinkerPop :: Archetype - TinkerGraph ........ SKIPPED

[INFO] Apache TinkerPop :: Archetype - Server ............. SKIPPED

[INFO] Apache TinkerPop :: Archetype - DSL ................ SKIPPED

[INFO] Apache TinkerPop :: Gremlin Tools .................. SKIPPED

[INFO] Apache TinkerPop :: Gremlin Benchmark .............. SKIPPED

[INFO] Apache TinkerPop :: Gremlin Coverage ............... SKIPPED

[INFO] Apache TinkerPop :: Gremlin IO Test 3.4.0-SNAPSHOT . SKIPPED

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 3.474 s

[INFO] Finished at: 2018-10-18T09:30:15-04:00

[INFO] ------------------------------------------------------------------------

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:1.4.1:enforce (enforce-all) on project tinkerpop: Execution enforce-all of goal org.apache.maven.plugins:maven-enforcer-plugin:1.4.1:enforce failed: An API incompatibility was encountered while executing org.apache.maven.plugins:maven-enforcer-plugin:1.4.1:enforce: java.lang.ExceptionInInitializerError: null

[ERROR] -----------------------------------------------------

[ERROR] realm =    plugin>org.apache.maven.plugins:maven-enforcer-plugin:1.4.1

[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy

[ERROR] urls[0] = file:/Users/sstrassmann/.m2/repository/org/apache/maven/plugins/maven-enforcer-plugin/1.4.1/maven-enforcer-plugin-1.4.1.jar

[ERROR] urls[1] = file:/Users/sstrassmann/.m2/repository/backport-util-concurrent/backport-util-concurrent/3.1/backport-util-concurrent-3.1.jar

[ERROR] urls[2] = file:/Users/sstrassmann/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.11/plexus-interpolation-1.11.jar

[ERROR] urls[3] = file:/Users/sstrassmann/.m2/repository/org/slf4j/slf4j-jdk14/1.5.6/slf4j-jdk14-1.5.6.jar

[ERROR] urls[4] = file:/Users/sstrassmann/.m2/repository/org/slf4j/jcl-over-slf4j/1.5.6/jcl-over-slf4j-1.5.6.jar

[ERROR] urls[5] = file:/Users/sstrassmann/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.2.1/maven-reporting-api-2.2.1.jar

[ERROR] urls[6] = file:/Users/sstrassmann/.m2/repository/org/apache/maven/doxia/doxia-sink-api/1.1/doxia-sink-api-1.1.jar

[ERROR] urls[7] = file:/Users/sstrassmann/.m2/repository/org/apache/maven/doxia/doxia-logging-api/1.1/doxia-logging-api-1.1.jar

[ERROR] urls[8] = file:/Users/sstrassmann/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar

[ERROR] urls[9] = file:/Users/sstrassmann/.m2/repository/org/codehaus/plexus/plexus-interactivity-api/1.0-alpha-4/plexus-interactivity-api-1.0-alpha-4.jar

[ERROR] urls[10] = file:/Users/sstrassmann/.m2/repository/org/sonatype/plexus/plexus-sec-dispatcher/1.3/plexus-sec-dispatcher-1.3.jar

[ERROR] urls[11] = file:/Users/sstrassmann/.m2/repository/org/sonatype/plexus/plexus-cipher/1.4/plexus-cipher-1.4.jar

[ERROR] urls[12] = file:/Users/sstrassmann/.m2/repository/org/codehaus/plexus/plexus-utils/3.0.22/plexus-utils-3.0.22.jar

[ERROR] urls[13] = file:/Users/sstrassmann/.m2/repository/commons-lang/commons-lang/2.3/commons-lang-2.3.jar

[ERROR] urls[14] = file:/Users/sstrassmann/.m2/repository/org/apache/maven/enforcer/enforcer-api/1.4.1/enforcer-api-1.4.1.jar

[ERROR] urls[15] = file:/Users/sstrassmann/.m2/repository/org/apache/maven/enforcer/enforcer-rules/1.4.1/enforcer-rules-1.4.1.jar

[ERROR] urls[16] = file:/Users/sstrassmann/.m2/repository/org/apache/maven/shared/maven-common-artifact-filters/1.4/maven-common-artifact-filters-1.4.jar

[ERROR] urls[17] = file:/Users/sstrassmann/.m2/repository/org/beanshell/bsh/2.0b4/bsh-2.0b4.jar

[ERROR] urls[18] = file:/Users/sstrassmann/.m2/repository/org/apache/maven/shared/maven-dependency-tree/2.2/maven-dependency-tree-2.2.jar

[ERROR] urls[19] = file:/Users/sstrassmann/.m2/repository/org/codehaus/plexus/plexus-component-annotations/1.5.5/plexus-component-annotations-1.5.5.jar

[ERROR] urls[20] = file:/Users/sstrassmann/.m2/repository/org/eclipse/aether/aether-util/0.9.0.M2/aether-util-0.9.0.M2.jar

[ERROR] urls[21] = file:/Users/sstrassmann/.m2/repository/org/codehaus/plexus/plexus-i18n/1.0-beta-6/plexus-i18n-1.0-beta-6.jar

[ERROR] urls[22] = file:/Users/sstrassmann/.m2/repository/org/apache/maven/plugin-testing/maven-plugin-testing-harness/1.3/maven-plugin-testing-harness-1.3.jar

[ERROR] urls[23] = file:/Users/sstrassmann/.m2/repository/org/codehaus/plexus/plexus-archiver/2.2/plexus-archiver-2.2.jar

[ERROR] urls[24] = file:/Users/sstrassmann/.m2/repository/org/codehaus/plexus/plexus-io/2.0.4/plexus-io-2.0.4.jar

[ERROR] urls[25] = file:/Users/sstrassmann/.m2/repository/junit/junit/4.11/junit-4.11.jar

[ERROR] urls[26] = file:/Users/sstrassmann/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar

[ERROR] Number of foreign imports: 1

[ERROR] import: Entry[import  from realm ClassRealm[maven.api, parent: null]]

[ERROR] 

[ERROR] -----------------------------------------------------

[ERROR] : begin 0, end 3, length 2

[ERROR] -> [Help 1]

[ERROR] 

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR] 

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException

[sstra...@kyruus.com]

FYI, I get the same error on branch master.

[Robert Dale]

Try a Java 8 JDK

Robert Dale

On Thu, Oct 18, 2018 at 10:12 AM sstrassmann via Gremlin-users <gremli...@googlegroups.com> wrote:

FYI, I get the same error on branch master.

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[sstra...@kyruus.com]

Thanks! I have installed Java 11, isn't that supported by Tinkerpop? Oracle says Java 8 is deprecated:
 

End of Public Updates for Oracle JDK 8
Oracle will not post further updates of Java SE 8 to its public download sites for commercial use after January 2019.

$ java --version
java 11 2018-09-25
Java(TM) SE Runtime Environment 18.9 (build 11+28)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11+28, mixed mode)

[Stephen Mallette]

3.4.0-rc2 was only a tag for a .NET early preview. we didn't deploy other artifacts. you'd have to build the tag yourself with

mvn clean install -DskipTests

we dont' really make artifact guarantees around beta/release candidates. they are generally for development/test purposes only.

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[Stephen Mallette]

sorry - i just re-read things...my answer was completely unhelpful. sorry about that. not sure what's wrong except the Java 11 part. never tried to build with that. i guess we need to start worrying about such things.