In a rare case, jlaunchd fails to turn on sampling process when a new configuration related to inline-jflow configuration is pushed. The commit completes but "show system process extensive" does not list sampling.

The commit is successful, but the following error is reported in the log:

Apr  3 12:10:39  r1 mgd[57131]: %INTERACT-6-UI_COMMIT_PROGRESS: Commit operation in progress: cannot signal 'Traffic sampling control process', signal 1, no pid
Apr  3 12:10:39  r1 mgd[57131]: %INTERACT-6-UI_COMMIT_PROGRESS: Commit operation in progress:  notifying rmopd(25)

Also, 'show system process extensive' does not list the samplings.

In a rare case, jlaunchd fails to turn on the sampling process when a new configuration related to inline-jflow configuration is pushed.

Below is an example of the new inline-jlfow configuration which causes the issue:

[edit groups]
  ABC { ... }
  IFCS-SAMPLING {
      interfaces {
          <ae*> {
              unit <*> {
                  family mpls {
                      filter {
                          input MPLS-SAMPLE;
                          output MPLS-SAMPLE;
                      }
                  }
              }
          }
      }
  }
[edit chassis]
  apply-groups [ FPCS-SAMPLING-TABLE-SIZE FPCS-SAMPLING-INSTANCE ];
[edit]
  services {
      flow-monitoring {
          version-ipfix {
              template INLINE-FLOW-MPLS-TEMPL {
                  mpls-ipv4-template {
                      label-position [ 1 2 3 ];
                  }
              }
          }
      }
  }
[edit interfaces]
  apply-groups IFCS-SAMPLING;
[edit forwarding-options]
   sampling {
       instance {
           INLINE-FLOW {
               input {
                   rate 5000;
                   run-length 0;
                   max-packets-per-second 20000;
               }
               family mpls {
                   output {
                       flow-server 142.95.80.91 {
                           port 9996;
                           version-ipfix {
                               template {
                                   INLINE-FLOW-MPLS-TEMPL;
                               }
                           }
                       }
                       inline-jflow {
                           source-address 142.93.140.13;
                       }
                   }
               }
           }
       }
   }
[edit firewall]
    family mpls {
        filter MPLS-SAMPLE {
            term default {
                then {
                    count mpls-in;
                    sample;
                    accept;
                }
            }
        }
    }

The issue is recovered by executing 'commit full'.

The following logs appear when the new process is initiated after the 'commit full'.