NPM crash occurs due to an ASSERT for FP_FOUND. The issue has been resolved in XOS 9.5.0 and above.The NPM reboots due to a crash, and the logs show the following entries:
Mar 6 18:20:09 npm1 cbs_np6_flowd[431]: [F] FP_FLOW_SYNC1: ASSERT "status == FP_FOUND" failed at flow_proc.c:3385
Mar 6 18:20:09 fw02vsx-cpm cbsirmd[4181]: [I] Node state change: slot 1 state 11
Mar 6 18:20:09 fw02vsx-cpm cbssysctrld[4110]: [I] NPM 1 began crash dumping
Problem: The problem occurs when the NPM is processing traffic and it is searching for a unidirectional flow entry but it receives a bidirectional entry instead. So, the NPM returns an ASSERT for FP_FOUND indicating the flow process was found but not the expected one.
Please contact Crossbeam support if you experience this issue.
The issue has been fixed in XOS version 9.5.0 and above.