Infrautils project offers technical utilities and infrastructures for other projects to use.

as per https://lists.opendaylight.org/pipermail/infrautils-dev/2018-March/000617.html :

Major Accomplishments - Oxygen Release

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• New infrautils.caches API, CLI commands for monitoring, and first implementation based on Guava
• New infrautils.metrics API with labels and first implementation based on Dropwizard incl. thread watcher
• Finalized JobCoordinator in infrautils (now removed in genius), and integrated with new metrics API
• infrautils.diagstatus, based on infrautils.ready
• infrautils.ready framework was exposed to northbound and southbound facing projects to provide a deterministic way to open their external facing ports
• Many new utility classes in package infrautils.utils, incl. JdkFutures, CompletableFutures, KeyedLocks, CheckedCallable, StackTraces and more
• infrautils:parent POM with Google' error-prone, another automated code quality metrics enforcement
• infrautils:parent POM enables enforcement of odlparent's optional (1) CS, (2) FB, (3) PMD CPD and (4) CP Dupes automated code quality metrics
• prepatory work for fully null safe code.

Bug Fixes

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• various minor clean up in the code base and Karaf features
• all of infrautils code itself now complies with the new quality rules from infrautils:parent

Additional Test Coverage

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• Genius CSIT was enhanced to add infrautils.diagstatus based CLIs to start CSIT in a deterministic way
• Junits were added for all the new modules that came in Oxygen

Better Documentation

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• Considerable cycles were spent in improving the project documentation during Oxygen release
• JavaDoc is at https://javadocs.opendaylight.org/org.opendaylight.infrautils/oxygen/
• specs at http://docs.opendaylight.org/en/latest/submodules/infrautils/docs/specs/index.html
• developer guide at http://docs.opendaylight.org/en/latest/developer-guide/infrautils-developer-guide.html