On this page

• Definition
• Access Control
• Example

New in version 3.2.

Definition

killOp

Terminates an operation as specified by the operation ID. The mongo shell provides the db.killOp() helper. To find operations and their corresponding IDs, see db.currentOp().

The killOp command must be run against the admin database.

To run killOp, use the db.runCommand( { <command> } ) method.

The command has the following form:

copy

{ "killOp": 1, "op": <opid> }

Parameter	Type	Description
op	number	An operation ID.

Warning

Terminate running operations with extreme caution. Only use killOp to terminate operations initiated by clients and do not terminate internal database operations.

Access Control

On systems running with authorization, to kill operations not owned by the user, the user must have access that includes the killop privilege action.

Example

The following example uses killOp to target the running operation with opid 3478.

db.adminCommand( { "killOp": 1, "op": 3478 } )

The operation returns the following result:

{ "info" : "attempting to kill op", "ok" : 1 }

killOp only confirms its attempt to end the specified operation. Use db.currentOp() to confirm the target operation was terminated.