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Date

Authors

Status

In progress

Summary

Impact

Non-technical Description


Trigger

  • Exceptions reported via Slack


Detection

  • Sentry alerting


Resolution


Timeline

BST unless otherwise stated

  • 2022-08-01 16:11 ESR processing failed messages start appearing on Slack #monitoring-esr channel

  • 2022-08-01 16:30ish ESR processes on Prod blue and green stopped

  • 2022-08-01 16:32ish Prod MongoDB server stopped

  • 2022-08-01 18:24 Prod MongoDB server started


Root Cause(s)


Action Items

Action Items

Owner

Look at list of CSV files that were received (as per esr.queue.csv.invalid and any others subsequent to stopping the ESR services that would have not been processed at all because the services were stopped)

Jayanta Saha

Review RabbitMQ esr.dlq.all messages [to identify any issues (such as?)]

Yafang Deng

Generate some Neo4J queries to check if a given {message id} was processed despite being in the DLQ

Joseph (Pepe) Kelly

Once turned-on MongoDB - check which files exported to ESR today, that they were processed before 16:11 failure

Reuben Roberts

Manually resend rabbit messages for reprocessing (excluding any found in neo4j that were processed despite being in the DLQ)

Joseph (Pepe) Kelly Message IDs:

1db2f10c-2400-4a16-83bb-440d9962091e
97f63a59-e285-4d30-9f35-539618b257f1
6db130ee-7e8b-4422-8719-142c964b8840
d787bb7a-8a14-4321-becc-f4f1b9e3d35c
02679ce8-cca3-4ef7-87e0-b40994596cd7
103edc7c-c684-4d07-945a-2a38f7802575

Restart ESR services (instructions for sequencing for this should be in the dev-ops repo):

Consider: for the position, placement and post queues, it is possible that create+delete messages will be processed in the incorrect order. Is there a way to check this?

Work out how to retrigger file processing (as per list of CSV files to be reprocessed that will be found in S3 bucket esr-sftp-prod, and others that were not processed at all and were received after 16:11)

DE_SEV_RMC_20220730_00001157.DAT

DE_SEV_RMC_20220731_00001158.DAT

DE_WES_RMC_20220729_00003589.DAT

DE_WES_RMC_20220730_00003590.DAT

DE_WES_RMC_20220731_00003591.DAT

DE_WMD_RMC_20220729_00003421.DAT

DE_WMD_RMC_20220730_00003422.DAT

DE_WMD_RMC_20220731_00003423.DAT

DE_YHD_RMC_20220729_00003512.DAT

DE_YHD_RMC_20220730_00003513.DAT

DE_YHD_RMC_20220731_00003514.DAT

DE_SEV_RMC_20220729_00001156.DAT

DE_EMD_RMC_20220801_00003116.DAT


Lessons Learned

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