[SERVER-51422] Unreliable ismaster.js test Created: 07/Oct/20  Updated: 06/Dec/22  Resolved: 12/Oct/20

Status: Closed
Project: Core Server
Component/s: Replication
Affects Version/s: None
Fix Version/s: None

Type: Bug Priority: Major - P3
Reporter: A. Jesse Jiryu Davis Assignee: Backlog - Replication Team
Resolution: Duplicate Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Duplicate
duplicates SERVER-51497 Remove additional timestamps from res... Closed
Assigned Teams:
Replication
Operating System: ALL
Participants:

 Description   

Observed in a patch test, ismaster.js fails like:

[js_test:ismaster] 2020-10-07T19:43:36.965+0000 assert: [{
[js_test:ismaster] 2020-10-07T19:43:36.965+0000 	"isWritablePrimary" : true,
[js_test:ismaster] 2020-10-07T19:43:36.965+0000 	"msg" : "isdbgrid",
[js_test:ismaster] 2020-10-07T19:43:36.965+0000 	"topologyVersion" : {
[js_test:ismaster] 2020-10-07T19:43:36.965+0000 		"processId" : ObjectId("5f7e1a341486671d8f7415fa"),
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 		"counter" : NumberLong(0)
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	},
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	"maxBsonObjectSize" : 16777216,
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	"maxMessageSizeBytes" : 48000000,
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	"maxWriteBatchSize" : 100000,
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	"logicalSessionTimeoutMinutes" : 30,
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	"connectionId" : 79,
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	"maxWireVersion" : 12,
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	"minWireVersion" : 0,
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	"ok" : 1,
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	"$clusterTime" : {
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 		"clusterTime" : Timestamp(1602099814, 8),
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 		"signature" : {
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 			"keyId" : NumberLong(0)
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 		}
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	},
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 	"operationTime" : Timestamp(1602099814, 8)
[js_test:ismaster] 2020-10-07T19:43:36.966+0000 }] != [{
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 	"isWritablePrimary" : true,
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 	"msg" : "isdbgrid",
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 	"topologyVersion" : {
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 		"processId" : ObjectId("5f7e1a341486671d8f7415fa"),
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 		"counter" : NumberLong(0)
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 	},
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 	"maxBsonObjectSize" : 16777216,
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 	"maxMessageSizeBytes" : 48000000,
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 	"maxWriteBatchSize" : 100000,
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 	"logicalSessionTimeoutMinutes" : 30,
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 	"connectionId" : 79,
[js_test:ismaster] 2020-10-07T19:43:36.967+0000 	"maxWireVersion" : 12,
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 	"minWireVersion" : 0,
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 	"ok" : 1,
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 	"$clusterTime" : {
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 		"clusterTime" : Timestamp(1602099816, 1),
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 		"signature" : {
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 			"keyId" : NumberLong(0)
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 		}
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 	},
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 	"operationTime" : Timestamp(1602099816, 1)
[js_test:ismaster] 2020-10-07T19:43:36.968+0000 }] are not equal
[js_test:ismaster] 2020-10-07T19:43:36.969+0000 doassert@src/mongo/shell/assert.js:20:14
[js_test:ismaster] 2020-10-07T19:43:36.969+0000 assert.eq@src/mongo/shell/assert.js:179:9
[js_test:ismaster] 2020-10-07T19:43:36.969+0000 @jstests/core/ismaster.js:75:1

The test is comparing the ismaster and hello responses. It deletes "localtime" from each response before comparing them, but it should delete operationTime and clusterTime as well, in case a background op advances the timestamps between calls.


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