Bug ID 912149: ASM sync failure with Cgc::Channel error 'Failed to send a message, error:15638476'

Last Modified: Mar 20, 2024

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1

Fixed In:
17.0.0, 16.1.2,,, 13.1.5

Opened: May 27, 2020

Severity: 2-Critical


The system exhibits various symptoms related to sync and control plane, and reports errors similar to the following: /var/log/: asm: -- (asm_config_server.pl,F5::Cgc::Channel::send): Failed to send a message, error:15638476. ts_debug.log: -- |ZEROMQ|May 21 23:27:31.840|24813|25914|25914|epoll.cpp:0060|~epoll_t()|(zmq_assert) Assertion failed: load.get () == 0


-- Config-sync does not work, resulting in a different configuration among the devices in a sync group. -- Security log profile changes are not propagated to other devices. -- Portions of the GUI hang, e.g.: Security module tab, and 'security' menu under virtual server. -- Policies with learning enabled do not generate learning suggestions.


-- Two devices in a sync-failover/sync-only device group. -- Other conditions required to reproduce this issue are under investigation. Note: The occurrences of the Cgc::Channel message in the /var/log/ and /var/log/ts/asm_config_server logs are the most reliable indicator of this issue.


Restart asm_config_server on the units in the device group. # pkill -f asm_config_server

Fix Information


Behavior Change

Guides & references

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