There is no default bindIp setting in any other official MongoDB packages. 

## SNMP Changes 

## Description 

## Solution 

• The IANA enterprise identifier for MongoDB changed from 37601 to 34601. 

• MongoDB changed the MIB field name globalopcounts to globalOpcounts . 

• Users of SNMP monitoring must modify their SNMP configuration (i.e. MIB) from 37601 to 34601. 

## Remove Method Signature Change 

• Update references to globalopcounts to globalOpcounts . 

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. 

Solution For existing db.collection.remove() invocations without a query document, modify the invocations to include an empty document db.collection.remove({}) . 

## Update Operator Syntax Validation 

## Description 

• Update operators (e.g $set) must specify a non-empty operand expression. For example, the following expression is now invalid: 

{ $set: { } } 

• Update operators (e.g $set) cannot repeat in the update statement. For example, the following expression is invalid: 

## Updates Enforce Field Name Restrictions 

## Description 

{ $set: { a: 5 }, $set: { b: 5 } } 

• Updates cannot use update operators (e.g $set) to target fields with empty field names (i.e. "" ). 

• Updates no longer support saving field names that contain a dot ( . ) or a field name that starts with a dollar sign ( $ ). 

## Solution 

• 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. 

• 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 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() . 

