D4Science Infrastructure

The nexus server on maven.research-infrastructure.eu seems to be misbehaving, see attached screenshots.

Although some of the maven artifacts seems to be available (I can browse, for instance http://maven.research-infrastructures.eu/nexus/content/repositories/dnet4-snapshots/eu/dnetlib/cnr-resultset-service/), the compilation fails due to the unavailability of some artifacts, and the unmet dependency changes from time to time:

claudio@dlib15 % mvn clean compile -U
[...]
[ERROR] Failed to execute goal on project cnr-modular-mdstore-service: Could not resolve dependencies for project eu.dnetlib:cnr-modular-mdstore-service:jar:5.0.2-SNAPSHOT: Failed to collect dependencies for [junit:junit:jar:4.8.2 (test), org.springframework:spring-test:jar:[4.0.0.RELEASE,4.0.0.RELEASE] (test), org.mockito:mockito-core:jar:1.6 (test), eu.dnetlib:cnr-test-utils:jar:[1.0.0,2.0.0) (test), eu.dnetlib:cnr-rmi-api:jar:[2.4.1,3.0.0) (compile), eu.dnetlib:cnr-blackboard-common:jar:[2.2.0,3.0.0) (compile), eu.dnetlib:cnr-misc-utils:jar:[1.0.0,2.0.0) (compile), eu.dnetlib:cnr-resultset-service:jar:[2.0.0,3.0.0) (compile), eu.dnetlib:cnr-resultset-client:jar:[2.0.0,3.0.0) (compile), log4j:log4j:jar:[1.2.17,1.2.17] (compile)]: No versions available for eu.dnetlib:cnr-blackboard-common:jar:[2.2.0,3.0.0) within specified range -> [Help 1]
claudio@dlib15 %
claudio@dlib15 % mvn clean compile -U
[...]
[INFO] [ERROR] Failed to execute goal on project cnr-modular-mdstore-service: Could not resolve dependencies for project eu.dnetlib:cnr-modular-mdstore-service:jar:5.0.2: Failed to collect dependencies for [junit:junit:jar:4.8.2 (test), org.springframework:spring-test:jar:[4.0.0.RELEASE,4.0.0.RELEASE] (test), org.mockito:mockito-core:jar:1.6 (test), eu.dnetlib:cnr-test-utils:jar:[1.0.0,2.0.0) (test), eu.dnetlib:cnr-rmi-api:jar:[2.4.1,3.0.0) (compile), eu.dnetlib:cnr-blackboard-common:jar:[2.2.0,3.0.0) (compile), eu.dnetlib:cnr-misc-utils:jar:[1.0.0,2.0.0) (compile), eu.dnetlib:cnr-resultset-service:jar:[2.0.0,3.0.0) (compile), eu.dnetlib:cnr-resultset-client:jar:[2.0.0,3.0.0) (compile), log4j:log4j:jar:[1.2.17,1.2.17] (compile)]: No versions available for eu.dnetlib:cnr-test-utils:jar:[1.0.0,2.0.0) within specified range -> [Help 1]