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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: None
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Labels:None
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Sharding
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Fully Compatible
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ALL
TransientTransactionErrors were uncovered on multiple tests when running a custom jsCore passthrough suite with the Logical Session Cache refresh set to 100ms.
The cleanest example of this error is in multi_statement_transaction – but there aren't any log lines in this test to investigate.
assert: command failed: { errorLabels" : [ [js_test:multi_statement_transaction] 2018-08-28T20:34:41.039+0000 "TransientTransactionError" [js_test:multi_statement_transaction] 2018-08-28T20:34:41.039+0000 ], [js_test:multi_statement_transaction] 2018-08-28T20:34:41.039+0000 "operationTime" : Timestamp(1535488481, 2), [js_test:multi_statement_transaction] 2018-08-28T20:34:41.039+0000 "ok" : 0, [js_test:multi_statement_transaction] 2018-08-28T20:34:41.043+0000 "errmsg" : "Unable to acquire lock '{6237343057549539649: Database, 1625657039122151745, config}' within a max lock request timeout of '5ms' milliseconds.", [js_test:multi_statement_transaction] 2018-08-28T20:34:41.043+0000 "code" : 24, [js_test:multi_statement_transaction] 2018-08-28T20:34:41.043+0000 "codeName" : "LockTimeout", [js_test:multi_statement_transaction] 2018-08-28T20:34:41.050+0000 "$clusterTime" : { [js_test:multi_statement_transaction] 2018-08-28T20:34:41.051+0000 "clusterTime" : Timestamp(1535488481, 2), [js_test:multi_statement_transaction] 2018-08-28T20:34:41.051+0000 "signature" : { [js_test:multi_statement_transaction] 2018-08-28T20:34:41.052+0000 "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="), [js_test:multi_statement_transaction] 2018-08-28T20:34:41.052+0000 "keyId" : NumberLong(0) [js_test:multi_statement_transaction] 2018-08-28T20:34:41.052+0000 } [js_test:multi_statement_transaction] 2018-08-28T20:34:41.052+0000 } [js_test:multi_statement_transaction] 2018-08-28T20:34:41.053+0000 }
The error also persists in the collation and transactions_profiling_with_drops tests (which have plenty of logs to look at).
After a cursory investigation of collation.js: it seems that a connection takes an exclusive write lock on config.system.sessions for an attempted update, then the LogicalSessionCache thread tries to take the lock as well – then fails. Check the highlighted lines on this Lobster log.
- is caused by
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SERVER-36961 createIndexes command should check if index already exists with weak lock
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- Closed
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- is related to
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- Closed
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