Bug ID 702439: Non-default HTTP/2 header_table_size causes HTTP/2 streams to be reset

Last Modified: Dec 20, 2018

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3

Fixed In:
14.1.0, 14.0.0, 13.1.0.4

Opened: Jan 17, 2018
Severity: 3-Major
Related AskF5 Article:
K04964898

Symptoms

If the HTTP/2 configuration header_table_size is changed from the default value of 4096, then streams will be reset with a RST_STREAM error.

Impact

HTTP/2 connections will be unusable.

Conditions

The header_table_size field in the HTTP/2 profile is changed from the default.

Workaround

Set the header table size argument back to its default.

Fix Information

The HTTP/2 filter correctly handles the dynamic header table resize notifications triggered by a non-default header table size. Streams will not be reset with a RST_STREAM error. Additionally, the BIG-IP system will now send the correct number of dynamic header table resize notifications when the table is resized by the client multiple times between header blocks.

Behavior Change