Loading options from map mentions wrong options

[kwek20]

Expected behavior

When i load a map with config values, and one of those has a typo/unknown key, RocksDB lets me know there is something wrong with the map in a more meaningful manner.

Example: DBOptions found unexpected key: "avoid_unecesary_blocking_io" (typo)
Or, a parameter which will be filled with an error message, or DBOptions.printErrors(). Anything :D

If you have a lot of options, it makes it hard to find the culprit

Actual behavior

DBOptions returns null instead of a DBOptions object

Steps to reproduce the behavior

for Java:

// my file contains a typo on one line, but all other options are correct
Map<String, Properties> map = loadDBOptionsFromMyFileSomewhere();
DBOptions options = DBOptions.getDBOptionsFromProps(map.get("DBOptions"));

if (options == null){
    System.out.println("Failed loading DBOptions")
}