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Cisco Bug: CSCvs88686 - ISR4K / ASR / CBR8 crash in cpp_cp_svr due to watchdog timeout

Last Modified

Sep 14, 2020

Products (1)

  • Cisco 3G Wireless WAN

Known Affected Releases

16.12.1 16.9.4 17.1.1 17.2 17.3.1

Description (partial)

Symptom:
An ISR4k, ASR or CBR8  running affected software could experience a crash in the packet processor control process (cpp_cp_svr) due to a watchdog timeout.  Prior to the crash, CPUHOG messages might be seen:

%EVENTLIB-3-CPUHOG: R0/0: cpp_cp_svr: undefined: 8735ms, Traceback=1#bfac4fc7f6da1f2b277224e595bad766   c:7F216B0BF000+334C0 shml:7F2183131000+68C5 shml:7F2183131000+674E shml:7F2183131000+66E9 shml:7F2183131000+2C28 cpp_common_os:7F2182EE5000+202FA cpp_common_os:7F2182EE5000+1F61E cpp_client_ha_oor:7F218E924000+1CEB cpp_common_os:7F2182EE5000+11D90 cpp_common_os:7F2182EE5000+12486 evlib:7F2180A8F000+8942
 %EVENTLIB-3-CPUHOG: R0/0: cpp_cp_svr: undefined: 9735ms, Traceback=1#bfac4fc7f6da1f2b277224e595bad766   c:7F216B0BF000+334C0 shml:7F2183131000+68C5 shml:7F2183131000+674E shml:7F2183131000+66E9 shml:7F2183131000+2C28 cpp_common_os:7F2182EE5000+202FA cpp_common_os:7F2182EE5000+1F61E cpp_client_ha_oor:7F218E924000+1CEB cpp_common_os:7F2182EE5000+11D90 cpp_common_os:7F2182EE5000+12486 evlib:7F2180A8F000+8942
 %EVENTLIB-3-CPUHOG: R0/0: cpp_cp_svr: undefined: 18734ms, Traceback=1#bfac4fc7f6da1f2b277224e595bad766   c:7F216B0BF000+334C0 shml:7F2183131000+68E7 shml:7F2183131000+674E shml:7F2183131000+66E9 shml:7F2183131000+2C28 cpp_common_os:7F2182EE5000+202FA cpp_common_os:7F2182EE5000+1F61E cpp_client_ha_oor:7F218E924000+1CEB cpp_common_os:7F2182EE5000+11D90 cpp_common_os:7F2182EE5000+12486 evlib:7F2180A8F000+8942

Conditions:
Random object concurrent access between session add/delete and internal system memory threshold monitor.
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