Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.3.0, 11.4.0, 11.4.1
Fixed In:
11.5.0, 11.4.1 HF6
Opened: Nov 20, 2013 Severity: 2-Critical Related Article:
K15634
BIG-IP may sometimes truncate large ICAP response streams returning from the ICAP server, even after the complete request has gone out to the ICAP server. This occurs after the fix for bug 429994 has been applied. The TCP window will slowly close, and might open and close a few times (normal flow-control) but at some point might close and never open.
Large files returning from an ICAP server may be truncated.
Fix for bug 429994 has been applied. Request-adapt or response-adapt, and icap profile. Large ICAP response stream (such as file get or post). Conditions are such that flow-control is operating.
Avoid flow-control conditions.
Flow returning from ICAP server see TCP window operating normally and does not lock up.