52

52 Release Notes

Documentation

Information on how to properly use the Singularity cache with Cromwell is now
provided in the Cromwell Singularity documentation.

Google library upgrade (#5565)

All previous versions of Cromwell shipped with Google Cloud Storage (GCS) libraries that are now deprecated and will stop working in August 2020. This release adopts updated libraries to ensure uninterrupted operation. The only user action required is upgrading Cromwell.

Bug fixes

• Fixed a bug that required Cromwell to be restarted in order to pick up DNS changes.
  • By default, the JVM caches DNS records with a TTL of infinity.
  • Cromwell now configures its JVM with a 3-minute TTL. This value can be customized by setting system.dns-cache-ttl.
• Clarified an error message that Cromwell emits when the compute backend terminates a job of its own volition (as opposed to termination in response to an abort request from Cromwell)
  • Previously, the error read The job was aborted from outside Cromwell
  • The new error reads The compute backend terminated the job. If this termination is unexpected, examine likely causes such as preemption, running out of disk or memory on the compute instance, or exceeding the backend's maximum job duration.