mongodb - Aggregate pipleline Error: getMore: cursor didn't exist on server, possible restart or timeout -

i facing issue mongodb. code this

for(loop) {     var cursorquery = db.beacon_0000.aggregate([         {             $match: {                 ...             }         },         {             $project: {                 ...             }         },         {             $group: {                 ...             }         },         {             $sort: {                 ...             }             }     ], {allowdiskuse: true} );      ...     while(cursorquery.hasnext()) {         var cursor = cursorquery.next();         ...     } } 

i run above query via command , mongo shell as

$ mongo dbname file.js 

after while cursor didn't exist on server error @ line cursorquery.hasnext().

in find query if error, can resolve adding addoption(dbquery.option.notimeout) option not seem available aggregate

please let me know how can resolve or workaround issue.

just provide additional update: when use

var cursor = db.collection..aggregate([ ...], {allowdiskuse: true} ).addoption(dbquery.option.notimeout) 

i error e query typeerror: object # has no method 'addoption'

however when use

var cursor = db.collection..find({...}, {...}).addoption(dbquery.option.notimeout) 

it works fine.

checking aggregate doc https://docs.mongodb.com/v3.0/reference/method/db.collection.aggregate/ says: returns:a cursor documents produced final stage of aggregation pipeline operation

and checking cursor doc https://docs.mongodb.com/v3.0/reference/method/cursor.addoption/#cursor.addoption

there no suggestion aggregate cursor different find cursor , former not support dbquery.option.notimeout.

so there bug @ mongodb this. way fix or have workaround.

note mongodb version 3.0

you have sort of answered yourself.

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adding option addoption(dbquery.option.notimeout) indeed fix issue when using find because stops cursor timing out , therefore exist when try .hasnext()

however cursor aggregation not have option can't stop timing out unfortunately.