We use a JSON token from our service account in Google Cloud Platform. This is used at the registry credential for our push to the GCP artifact registry. This works sometimes, but randomly and sometimes consistently we get unauthorized errors. I have spoken with Google support about this and they stated that they are not properly receiving the credentials with the push request.

Step 1/9 : FROM openjdk:8-alpine
8-alpine: Pulling from library/openjdk
Digest: sha256:94792824df2df33402f201713f932b58cb9de94a0cd524164a0f2283343547b3
Status: Image is up to date for openjdk:8-alpine
---> a3562aa0b991
Step 2/9 : RUN apk --no-cache add msttcorefonts-installer fontconfig && update-ms-fonts && fc-cache -f
---> Using cache
---> e8478928b286
Step 3/9 : EXPOSE 8080
---> Using cache
---> d4fa7d19a7f7
Step 4/9 : ARG SPRING_PROFILE=gke-demo01
---> Using cache
---> 45a8674b5a3a
Step 5/9 : ENV SPRING_PROFILE=${SPRING_PROFILE}
---> Using cache
---> 7dcfb9ea872a
Step 6/9 : RUN echo ${SPRING_PROFILE}
---> Using cache
---> bded77b51369
Step 7/9 : RUN mkdir /app
---> Using cache
---> fd73f138be7a
Step 8/9 : COPY /build/libs/*.jar /app/reports.jar
---> Using cache
---> 173274f1d3f2
Step 9/9 : ENTRYPOINT ["java","-Dspring.profiles.active=${SPRING_PROFILE}","-jar","/app/reports.jar"]
---> Using cache
---> 051b8f400efd
Successfully built 051b8f400efd
Successfully tagged us-central1-docker.pkg.dev/xxx/reports-app/reports-app-demo01:latest
[Reports App] $ docker inspect 051b8f400efd
WARNING: Support for the legacy ~/.dockercfg configuration file and file-format is deprecated and will be removed in an upcoming release
[Reports App] $ docker push us-central1-docker.pkg.dev/xxx/reports-app/reports-app-demo01
WARNING: Support for the legacy ~/.dockercfg configuration file and file-format is deprecated and will be removed in an upcoming release
Using default tag: latest
The push refers to repository [us-central1-docker.pkg.dev/xxx/reports-app/reports-app-demo01]
aac09c0c4fbb: Preparing
37025e3505dd: Preparing
08a9a5d1ee3e: Preparing
ceaf9e1ebef5: Preparing
9b9b7f3d56a0: Preparing
f1b5933fe4b5: Preparing
f1b5933fe4b5: Waiting
unauthorized: failed authentication
failed build com.cloudbees.dockerpublish.DockerBuilder@3b88483c SUCCESS
Finished: FAILURE