KB014 - After updating a database field the values are not reflected in the application layer

Issue: After updating a database field directly on the primary data source the values are not reflected on the IMSI and/or FHIR interfaces.

Applies To:

  • OpenIZ Immunization Management Service (IMS)

Symptoms:

  • When updating a database field using SQL the value is changed in the database but not reflected in applications.
  • When querying a FHIR based resource the updated values do not present themselves.

Cause: The OpenIZ IMS uses an in-memory cache to speed up the retrieval of data from the primary data source. The two options for this are a built-in memory cache or REDIS. When you update the value directly on the database, it does not invalidate the cache data.

Solution:

When using the built-in memory cache:

  1. Open a command prompt as Administrator
  2. Restart the OpenIZ host process using the command:
    • net stop "OpenIZ Host Process"
    • net start "OpenIZ Host Process"
  3. Note: Your instance of OpenIZ IMS will be unavailable during this time

When using the REDIS cache service

  1. Open a command prompt as Administrator on your REDIS host server
  2. Restart the REDIS process using the command
    • net stop redis
    • net start redis
  3. Note: Your instance of OpenIZ IMS will continue to be available during this time.

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