Gradle build on GitLab CI: Could not create service of type ScriptPluginFactory

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Using parallel Gradle jobs on GitLab CI:

Parallel Gradle jobs

I'm receiving following random Gradle exception:

FAILURE: Build failed with an exception.

* What went wrong:
Could not create service of type ScriptPluginFactory using BuildScopeServices.createScriptPluginFactory().
> Could not create service of type ResourceSnapshotterCacheService using GradleUserHomeScopeServices.createResourceSnapshotterCacheService().

I use a docker executor of gitlab-runner without any GitLab CI caching. I use a Docker volume instead with Gradle cache pointing to that volume:

before_script:
  - export GRADLE_USER_HOME=/pipelines/.gradle

There is no issue with access rights to the /pipelines directory (so it's not duplicity of this question).

Simple, but annoying workaround to this issue is just to re-trigger the failed job manually - then it passes without any problem. Another workaround could to re-trigger the job automatically via the retry directive.

So, my question is: What is causing the job failure and how to solve it (without job re-triggering)?

gitlab-ci-runner gitlab-ci docker gradle
1 Answers

Root cause:

After some debugging (switches --stacktrace and --info), it's obvious that the root cause is that multiple Docker containers are sharing one Gradle cache on the host machine.

Caused by: org.gradle.cache.LockTimeoutException: Timeout waiting to lock file hash cache (/pipelines/.gradle/caches/4.10.2/fileHashes). It is currently in use by another Gradle instance.
Owner PID: 158
Our PID: 160
Owner Operation: 
Our operation: 
Lock file: /pipelines/.gradle/caches/4.10.2/fileHashes/fileHashes.lock

Solution:

There is still unsolved Gradle bug/feature: Let multiple containers share downloaded dependencies. Therefore I (re)implemented proper Gradle caching per each involved GitLab CI job (so, no shared cache ):

before_script:
  - export GRADLE_USER_HOME=`pwd`/.gradle

rpmClient:
  stage: buildRpm
  script:
  - gradle clientRpm
  cache:
    paths:
    - .gradle/caches
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