When there are deployment in the loop to Conda repository or if there are any storage events happening extensively or in the loop. The Calculation for Conda package will fail because the events have not yet completed or committed and yet the metadata calculation is triggered causing it to fail due to a race condition.
2019-04-30 17:17:26,924 [art-exec-6319] [ERROR] (o.a.w.q.WorkQueueImpl:99) - Conda Metadata: failed to process CondaRecalculateMetadataWorkItem(parentRepoPath=Demo-local-conda:, eventType=ADD)
java.lang.RuntimeException: Failed to call work queue 'Conda Metadata' callback due to :Failed to retrieve resource Demo-local-conda:cheetah-2.4.4-py27_0.tar.bz2: Could not get resource stream. Path 'cheetah-2.4.4-py27_0.tar.bz2' not found in Demo-local-conda
a workaround is to manually run metadata calculation either by UI (Recalculate index) or Conda metadata REST API