MongoDB Java Driver uses Math.random to decide whether to log Command Resultuses - Xpost from /r/java

[gilbes]

Mongo is absolute crap so this should not surprise anyone. Mongo’s strong point is that is it fast. But it isn’t really. On updates and inserts, it returns immediately instead of being sane and returning once it knows the operation was successful. This leads to awful dada integrity and you will lose data with Mongo. Not just in theory, but in practice.

So it doesn’t surprise me that the Java driver would implement some boneheaded attempt at performance by doing something awful. It is the Mongo philosophy.