Bug ID 683061: Rapid creation/update/deletion of the same external datagroup may cause core

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,

Fixed In:

Opened: Sep 12, 2017

Severity: 3-Major


Notice and error messages and core when during rapid creation/update/deletion of the same external datagroup. -- notice tmm[15187]: 01010259:5: External Datagroup (/Common/Datagroup_1) queued. -- notice tmm[15187]: 01010259:5: External Datagroup (/Common/Datagroup_1) queued for update. -- err tmm[15187]: 01010258:3: External Datagroup (/Common/Datagroup_1) creation failed: initial load error, deleting.


TMM crashes and generates a core. Traffic disrupted while tmm restarts. Note: This is a timing-related crash that might not occur every time.


Using an external datagroup, rapidly creating and updating, and then deleting it.


Allow the tmm process enough time to finish processing external datagroup changes before starting another operation. Depending on the size of the datagroup, this might require from 1 second to 10 seconds or more. You can examine the LTM log for the create=finished message to help determine how much wait time is required.

Fix Information


Behavior Change

Guides & references

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