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Date

Authors

Philip Wilsdon (Unlicensed)

Status

Documenting

Summary

https://hee-tis.atlassian.net/browse/TIS21-1300

Impact

  • An increase in the number of helpdesk calls as people could not see trainees in Intrepid Leave Manager.  

Non-technical Description

There was an interruption that stopped TIS data being sent to Hicom via the NDW.

Trigger

Detection

  • Alerting in our monitoring channel

Resolution

Timeline

  • - 04:41 & 05:02 - Alerts in the NDW monitoring channel

  • - 09:06 - NDW succesfuly re-run on stage and prod

  • - ~midday - Agreed with HICOM less disruption by waiting for tomorrow rather than re-running jobs

Root Cause(s)

  • The Ansible job timed

  • The ETL kept retrying a failed chunk

  • All connections in the to NDW got closed

Action Items

Action Items

Owner

Improve Alerting from NDW ETLs (probably using Sentry)

Marcello Fabbri (Unlicensed) Edward Barclay

Configure persistent logs from NDW ETLs

Edward Barclay Marcello Fabbri (Unlicensed)

Improve Connection Pools: validation, eviction etc.

Lessons Learned

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Slack: https://hee-nhs-tis.slack.com/
Jira issues: https://hee-tis.atlassian.net/issues/?filter=14213