MongoDB 3.4.0-rc5 has been released for testing purposes, building on the development series of MongoDB 3.3.x. The community is invited to participate in a bug hunt to ensure the quality of this release and can learn more about upcoming features through an online course. This release includes fixes for several issues, including support for collation in sharding, escape of nested quotes in rpm init scripts, correction of cursor timeout settings, and consideration of terms when selecting sync sources.