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Docker image hashing issues in some scenarios with TES backend
With the TES backend it is possible to run cromwell locally and have your tasks run on google compute engine. In this context the docker hash causes issues. It appears that the hash is being calculated for the docker version of the image rather than the gcr version of the image. So when the TES service attempts to pull down the image an error occurs since that hash doesn't exist in gcr.
- turn off hashing altogether
- specify gcr or docker as the remote for hash calculation