It's not immediately obvious to me why I see this and the checks in this project's own pom.xml don't; but I definitely see this in a project that does nothing but import the datastore dependency from the google-cloud-java BOM and check dependency convergence: ``` [INFO] Scanning for projects... [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building Dependency Tests for Google Cloud Libraries 0.0.1-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-enforcer-plugin:1.4.1:enforce (enforce) @ dependencytest --- [WARNING] Dependency convergence error for com.google.code.findbugs:jsr305:1.3.9 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.guava:guava:24.1-jre +-com.google.code.findbugs:jsr305:1.3.9 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.code.findbugs:jsr305:3.0.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.api:api-common:1.5.0 +-com.google.code.findbugs:jsr305:3.0.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.api:gax:1.23.0 +-com.google.code.findbugs:jsr305:3.0.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.oauth-client:google-oauth-client:1.23.0 +-com.google.code.findbugs:jsr305:1.3.9 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.api:gax-httpjson:0.40.0 +-com.google.code.findbugs:jsr305:3.0.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-api:0.11.1 +-com.google.code.findbugs:jsr305:3.0.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-contrib-http-util:0.11.1 +-com.google.code.findbugs:jsr305:3.0.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-io.grpc:grpc-core:1.10.1 +-com.google.code.findbugs:jsr305:3.0.0 [WARNING] Dependency convergence error for com.google.protobuf:protobuf-java:3.5.1 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.protobuf:protobuf-java-util:3.5.1 +-com.google.protobuf:protobuf-java:3.5.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.api.grpc:proto-google-common-protos:1.9.0 +-com.google.protobuf:protobuf-java:3.5.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.api.grpc:proto-google-iam-v1:0.10.0 +-com.google.protobuf:protobuf-java:3.5.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.api.grpc:proto-google-cloud-datastore-v1:0.10.0 +-com.google.protobuf:protobuf-java:3.5.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.http-client:google-http-client-protobuf:1.20.0 +-com.google.protobuf:protobuf-java:2.4.1 [WARNING] Dependency convergence error for com.google.errorprone:error_prone_annotations:2.1.3 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.guava:guava:24.1-jre +-com.google.errorprone:error_prone_annotations:2.1.3 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-api:0.11.1 +-com.google.errorprone:error_prone_annotations:2.2.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-contrib-http-util:0.11.1 +-com.google.errorprone:error_prone_annotations:2.2.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-io.grpc:grpc-core:1.10.1 +-com.google.errorprone:error_prone_annotations:2.1.2 [WARNING] Dependency convergence error for com.google.http-client:google-http-client-jackson2:1.19.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.auth:google-auth-library-oauth2-http:0.9.0 +-com.google.http-client:google-http-client-jackson2:1.19.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.api-client:google-api-client:1.23.0 +-com.google.http-client:google-http-client-jackson2:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.http-client:google-http-client-jackson2:1.23.0 [WARNING] Dependency convergence error for com.google.http-client:google-http-client-jackson:1.23.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.http-client:google-http-client-jackson:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.http-client:google-http-client-jackson:1.20.0 [WARNING] Dependency convergence error for com.google.api-client:google-api-client:1.23.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.api-client:google-api-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.api-client:google-api-client:1.20.0 [WARNING] Dependency convergence error for io.opencensus:opencensus-api:0.11.1 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-api:0.11.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-contrib-http-util:0.11.1 +-io.opencensus:opencensus-api:0.11.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-io.grpc:grpc-core:1.10.1 +-io.opencensus:opencensus-api:0.11.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-io.grpc:grpc-core:1.10.1 +-io.opencensus:opencensus-contrib-grpc-metrics:0.11.0 +-io.opencensus:opencensus-api:0.11.0 [WARNING] Dependency convergence error for com.google.oauth-client:google-oauth-client:1.23.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.oauth-client:google-oauth-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.api-client:google-api-client:1.23.0 +-com.google.oauth-client:google-oauth-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.oauth-client:google-oauth-client:1.20.0 [WARNING] Dependency convergence error for io.grpc:grpc-context:1.9.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-api:0.11.1 +-io.grpc:grpc-context:1.9.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-io.grpc:grpc-core:1.10.1 +-io.grpc:grpc-context:1.10.1 [WARNING] Dependency convergence error for com.google.http-client:google-http-client:1.23.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.auth:google-auth-library-oauth2-http:0.9.0 +-com.google.http-client:google-http-client:1.19.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.oauth-client:google-oauth-client:1.23.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.http-client:google-http-client-appengine:1.23.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.http-client:google-http-client-jackson:1.23.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.api:gax-httpjson:0.40.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.http-client:google-http-client-protobuf:1.20.0 +-com.google.http-client:google-http-client:1.20.0 [WARNING] Rule 0: org.apache.maven.plugins.enforcer.DependencyConvergence failed with message: Failed while enforcing releasability the error(s) are [ Dependency convergence error for com.google.code.findbugs:jsr305:1.3.9 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.guava:guava:24.1-jre +-com.google.code.findbugs:jsr305:1.3.9 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.code.findbugs:jsr305:3.0.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.api:api-common:1.5.0 +-com.google.code.findbugs:jsr305:3.0.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.api:gax:1.23.0 +-com.google.code.findbugs:jsr305:3.0.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.oauth-client:google-oauth-client:1.23.0 +-com.google.code.findbugs:jsr305:1.3.9 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.api:gax-httpjson:0.40.0 +-com.google.code.findbugs:jsr305:3.0.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-api:0.11.1 +-com.google.code.findbugs:jsr305:3.0.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-contrib-http-util:0.11.1 +-com.google.code.findbugs:jsr305:3.0.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-io.grpc:grpc-core:1.10.1 +-com.google.code.findbugs:jsr305:3.0.0 , Dependency convergence error for com.google.protobuf:protobuf-java:3.5.1 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.protobuf:protobuf-java-util:3.5.1 +-com.google.protobuf:protobuf-java:3.5.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.api.grpc:proto-google-common-protos:1.9.0 +-com.google.protobuf:protobuf-java:3.5.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.api.grpc:proto-google-iam-v1:0.10.0 +-com.google.protobuf:protobuf-java:3.5.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.api.grpc:proto-google-cloud-datastore-v1:0.10.0 +-com.google.protobuf:protobuf-java:3.5.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.http-client:google-http-client-protobuf:1.20.0 +-com.google.protobuf:protobuf-java:2.4.1 , Dependency convergence error for com.google.errorprone:error_prone_annotations:2.1.3 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.guava:guava:24.1-jre +-com.google.errorprone:error_prone_annotations:2.1.3 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-api:0.11.1 +-com.google.errorprone:error_prone_annotations:2.2.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-contrib-http-util:0.11.1 +-com.google.errorprone:error_prone_annotations:2.2.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-io.grpc:grpc-core:1.10.1 +-com.google.errorprone:error_prone_annotations:2.1.2 , Dependency convergence error for com.google.http-client:google-http-client-jackson2:1.19.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.auth:google-auth-library-oauth2-http:0.9.0 +-com.google.http-client:google-http-client-jackson2:1.19.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.api-client:google-api-client:1.23.0 +-com.google.http-client:google-http-client-jackson2:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.http-client:google-http-client-jackson2:1.23.0 , Dependency convergence error for com.google.http-client:google-http-client-jackson:1.23.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.http-client:google-http-client-jackson:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.http-client:google-http-client-jackson:1.20.0 , Dependency convergence error for com.google.api-client:google-api-client:1.23.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.api-client:google-api-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.api-client:google-api-client:1.20.0 , Dependency convergence error for io.opencensus:opencensus-api:0.11.1 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-api:0.11.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-contrib-http-util:0.11.1 +-io.opencensus:opencensus-api:0.11.1 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-io.grpc:grpc-core:1.10.1 +-io.opencensus:opencensus-api:0.11.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-io.grpc:grpc-core:1.10.1 +-io.opencensus:opencensus-contrib-grpc-metrics:0.11.0 +-io.opencensus:opencensus-api:0.11.0 , Dependency convergence error for com.google.oauth-client:google-oauth-client:1.23.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.oauth-client:google-oauth-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.api-client:google-api-client:1.23.0 +-com.google.oauth-client:google-oauth-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.oauth-client:google-oauth-client:1.20.0 , Dependency convergence error for io.grpc:grpc-context:1.9.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-io.opencensus:opencensus-api:0.11.1 +-io.grpc:grpc-context:1.9.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-io.grpc:grpc-core:1.10.1 +-io.grpc:grpc-context:1.10.1 , Dependency convergence error for com.google.http-client:google-http-client:1.23.0 paths to dependency are: +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core:1.27.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.auth:google-auth-library-oauth2-http:0.9.0 +-com.google.http-client:google-http-client:1.19.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.oauth-client:google-oauth-client:1.23.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.http-client:google-http-client-appengine:1.23.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.http-client:google-http-client-jackson:1.23.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud:google-cloud-core-http:1.27.0 +-com.google.api:gax-httpjson:0.40.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.http-client:google-http-client:1.23.0 and +-com.google.cloud.tools.dependencies:dependencytest:0.0.1-SNAPSHOT +-com.google.cloud:google-cloud-datastore:1.27.0 +-com.google.cloud.datastore:datastore-v1-proto-client:1.6.0 +-com.google.http-client:google-http-client-protobuf:1.20.0 +-com.google.http-client:google-http-client:1.20.0 ] [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.710 s [INFO] Finished at: 2018-04-25T08:04:18-04:00 [INFO] Final Memory: 10M/159M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:1.4.1:enforce (enforce) on project dependencytest: Some Enforcer rules have failed. Look above for specific messages explaining why the rule failed. -> [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/MojoExecutionException ```