Advisor
ProfessorWe have observered similar issues with Ping failing via the collector application but not from the OS it self. A restart would resolve the issue for awhile. What we found was adjusting the threadpool for Ping to fix our problem. It seems the collector would max out of threads for ping and then just start failing. After adjusting the threadpool count we didn’t encounter this issue again.
Are you certain that fixed the issue? Because that would require a collector restart and that is what fixes the problem since it forces generation of new ID values for ICMP and SNMP “sessions”.
This problem has been going on for years and LM seems to have no plan to fix it. We routinely lose hours of data due to intermediate firewall session invalidation and I’ve seen only a glimmer of interest from folks at LM. The collector code needs to be updated to generate new ICMP and SNMP “sessions” for each check, or at least do so periodically (e.g., every 5-10 minutes) so this stops happening.
