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Allow access to the list of active cursors.

This should allow returning something like this:

> db.runCommand("listCursors")

{ ok:1.0,

 cursors: [

	id:...,

	ns:...,

	query:...,

	client:...,

	created:....,

	lastAccess:...,

	noTimeout:..,

	timeoutInMS:...,

	runningMS:...,

	yieldNum:...,

	user:...,

	nReturned:...,

	nPosition:...,

	...} //recordStats/locks/curOp-info/etc

This command should be user-aware and only return cursors for the active user.

Paramters:

name	value	desc/behavior
filter	<any query filter>, {id:###}	This should allow a filter/match param to reduce the total set of cursors returned.
ns/db		filters to this ns/db – command name value is the default for this if not true-ish
user	<current>	This command should be user-aware and only return cursors for the active user. Optionally this should allow overriding to return all user info if the user has privs

is depended on by

SERVER-14047 endless "moveChunk failed, because there are still n deletes from previous migration"

is documented by

DOCS-12147 Docs for SERVER-3090: Add the ability to list open cursors

is duplicated by

SERVER-5816 Add command to get a list of open cursors

SERVER-1919 cursor info option to get detailed info about a specifc cursor or all

related to

SERVER-5813 Create a shell helper to kill a cursor by id

SERVER-19982 Log diagnostic message when creating "no timeout" cursors

(1 related to)

Participants:: Antoine Girbal, Backlog - Query Team, David Storch, Dwight Merriman, Glen Miner, Itso Slavchev, Lucas, Scott Hernandez, Scott Simpson, Ted Tuckman