lockInfo
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Definition
Syntax
The command has the following syntax:
db.adminCommand( { lockInfo: 1 } )
Output Example
The following is an example of the output from the lockInfo:
{
"lockInfo" : [
{
"resourceId" : "{2305843009213693953: ParallelBatchWriterMode, 1}",
"granted" : [
{
"mode" : "IS",
"convertMode" : "NONE",
"enqueueAtFront" : false,
"compatibleFirst" : false,
"debugInfo" : "{ findandmodify: \"hugeindex\", query: { _id: 585.0 }, update: { $pop: { a: 1.0 } }, upsert: false, new: false, lsid: { id: UUID(\"dc611138-04c6-49b1-a7ac-161040dd9d65\") }, $db: \"test\" }",
"clientInfo" : {
"desc" : "conn3",
"connectionId" : 3,
"client" : "127.0.0.1:55165",
"opid" : 28770
}
}
],
"pending" : [ ]
},
{
"resourceId" : "{6917529027641081857: Global, 1}",
"granted" : [
{
"mode" : "IX",
"convertMode" : "NONE",
"enqueueAtFront" : false,
"compatibleFirst" : false,
"debugInfo" : "{ findandmodify: \"hugeindex\", query: { _id: 585.0 }, update: { $pop: { a: 1.0 } }, upsert: false, new: false, lsid: { id: UUID(\"dc611138-04c6-49b1-a7ac-161040dd9d65\") }, $db: \"test\" }",
"clientInfo" : {
"desc" : "conn3",
"connectionId" : 3,
"client" : "127.0.0.1:55165",
"opid" : 28770
}
},
{
"mode" : "IX",
"convertMode" : "NONE",
"enqueueAtFront" : false,
"compatibleFirst" : false,
"debugInfo" : "index build: 29d48366-63ad-41e2-a689-69255a89c094",
"clientInfo" : {
"desc" : "IndexBuildsCoordinatorMongod-0",
"opid" : 27437
}
}
],
"pending" : [ ]
},
{
"resourceId" : "{4611686018427387905: ReplicationStateTransition, 1}",
"granted" : [
{
"mode" : "IX",
"convertMode" : "NONE",
"enqueueAtFront" : false,
"compatibleFirst" : false,
"debugInfo" : "{ findandmodify: \"hugeindex\", query: { _id: 585.0 }, update: { $pop: { a: 1.0 } }, upsert: false, new: false, lsid: { id: UUID(\"dc611138-04c6-49b1-a7ac-161040dd9d65\") }, $db: \"test\" }",
"clientInfo" : {
"desc" : "conn3",
"connectionId" : 3,
"client" : "127.0.0.1:55165",
"opid" : 28770
}
},
{
"mode" : "IX",
"convertMode" : "NONE",
"enqueueAtFront" : false,
"compatibleFirst" : false,
"debugInfo" : "index build: 29d48366-63ad-41e2-a689-69255a89c094",
"clientInfo" : {
"desc" : "IndexBuildsCoordinatorMongod-0",
"opid" : 27437
}
}
],
"pending" : [ ]
},
{
"resourceId" : "{10123292395995783581: Database, 899920359141007773, test}",
"granted" : [
{
"mode" : "IX",
"convertMode" : "NONE",
"enqueueAtFront" : false,
"compatibleFirst" : false,
"debugInfo" : "{ findandmodify: \"hugeindex\", query: { _id: 585.0 }, update: { $pop: { a: 1.0 } }, upsert: false, new: false, lsid: { id: UUID(\"dc611138-04c6-49b1-a7ac-161040dd9d65\") }, $db: \"test\" }",
"clientInfo" : {
"desc" : "conn3",
"connectionId" : 3,
"client" : "127.0.0.1:55165",
"opid" : 28770
}
},
{
"mode" : "IX",
"convertMode" : "NONE",
"enqueueAtFront" : false,
"compatibleFirst" : false,
"debugInfo" : "index build: 29d48366-63ad-41e2-a689-69255a89c094",
"clientInfo" : {
"desc" : "IndexBuildsCoordinatorMongod-0",
"opid" : 27437
}
}
],
"pending" : [ ]
},
{
"resourceId" : "{12576221391967629173: Collection, 1047006345899159413, test.hugeindex}",
"granted" : [
{
"mode" : "IX",
"convertMode" : "NONE",
"enqueueAtFront" : false,
"compatibleFirst" : false,
"debugInfo" : "{ findandmodify: \"hugeindex\", query: { _id: 585.0 }, update: { $pop: { a: 1.0 } }, upsert: false, new: false, lsid: { id: UUID(\"dc611138-04c6-49b1-a7ac-161040dd9d65\") }, $db: \"test\" }",
"clientInfo" : {
"desc" : "conn3",
"connectionId" : 3,
"client" : "127.0.0.1:55165",
"opid" : 28770
}
},
{
"mode" : "IX",
"convertMode" : "NONE",
"enqueueAtFront" : false,
"compatibleFirst" : false,
"debugInfo" : "index build: 29d48366-63ad-41e2-a689-69255a89c094",
"clientInfo" : {
"desc" : "IndexBuildsCoordinatorMongod-0",
"opid" : 27437
}
}
],
"pending" : [ ]
}
],
"ok" : 1
}
Output Fields
lockInfo.granted-
An array of documents. Each document provides information on locks that are currently granted on the resource.
lockInfo.pending-
An array of documents. Each document provides information on locks that are currently pending on the resource.
Lock Information
For each granted or pending lock document, information include:
| Field | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
mode | Specifies the lock mode:
| ||||||||||
convertMode | Specifies the new lock mode for conversion. | ||||||||||
enqueueAtFront | A boolean that indicates whether to put the lock at the front of the queue or the back in case of conflict. | ||||||||||
compatibleFirst | A boolean that indicates to grant lock requests based on compatibility with already granted locks or to use the first-in-first-out (FIFO) order. | ||||||||||
debugInfo | Information about the operation that issued the lock request. | ||||||||||
clientInfo | A document detailing the client information. |