MongoDB Documentation, Release 3.0.4 SNMP Changes Description Solution Remove Method Signature Change Update Operator Syntax Validation Description Updates Enforce Field Name Restrictions Description Solution There is no default bindIp setting in any other official MongoDB packages. { $set: { } } { $set: { a: 5 }, $set: { b: 5 } } 861 12.2. Previous Stable Releases • For existing documents that have fields with names that start with a dollar sign ( $ ), unset or rename those fields. To find fields whose names start with a dollar sign, run db.upgradeCheckAllDBs() . • For existing documents that have fields with names that contain a dot ( . ), either replace the whole docu- ment or unset the field. To find fields whose names contain a dot, run db.upgradeCheckAllDBs() . • For existing documents that have fields with empty names "" , replace the whole document. See db.collection.update() and db.collection.save() for details on replacing an existing document. • Updates no longer support saving field names that contain a dot ( . ) or a field name that starts with a dollar sign ( $ ). • Updates cannot use update operators (e.g $set) to target fields with empty field names (i.e. "" ). • Update operators (e.g $set) cannot repeat in the update statement. For example, the following expression is invalid: • Update operators (e.g $set) must specify a non-empty operand expression. For example, the following expression is now invalid: Solution For existing db.collection.remove() invocations without a query document, modify the invocations to include an empty document db.collection.remove({}) . Description db.collection.remove() requires a query document as a parameter. In previous versions, the method invocation without a query document deleted all documents in a collection. • Update references to globalopcounts to globalOpcounts . • Users of SNMP monitoring must modify their SNMP configuration (i.e. MIB) from 37601 to 34601. • MongoDB changed the MIB field name globalopcounts to globalOpcounts . • The IANA enterprise identifier for MongoDB changed from 37601 to 34601.