The pccd-service subsystem is not responding to management requests.

• The pccd-service subsystem is not responding to management requests
  lab@dut> show path-computation-client status
  error: the pccd-service subsystem is not responding to management requests
  
  lab@dut> show version node all
  re0:
  --------------------------------------------------------------------------
  Hostname: dut
  Model: ptx10001-36mr
  Junos: 20.4X16.1-EVO
  Yocto: 2.2.1
  Linux Kernel: 4.8.28-WR2.2.1_standard-gc37d253
  JUNOS-EVO OS 64-bit [junos-evo-install-ptx-fixed-x86-64-20.4X16.1-EVO]
  
  
  

          pcep {
              pce NORTHSTAR-LID {
                  local-address 192.168.1.1;
                  destination-ipv4-address 192.168.1.3;
                  destination-port 4189;
                  pce-type active stateful;
                  lsp-provisioning;
              }
              pce PARAGON {
                  local-address 192.168.1.1;
                  destination-ipv4-address 192.168.1.2;
                  destination-port 4189;
                  pce-type active stateful;
                  lsp-provisioning;
              }
          }

      There will be a chance when the TCP session with Northstar is down but with Paragon it is up.
      Northstar Version is 6.2.0(Jan 5 2021) because of too many requests.

  tcp        0      0 x.x.x.x:42099     192.168.1.3:4189     ESTABLISHED 17884/pccd
  tcp        0      0 128.0.0.4:49746   128.0.0.4:705   ESTABLISHED 17884/pccd
  tcp       33      0 192.168.1.1:53203     192.168.1.2:4189     CLOSE_WAIT  17884/pccd

      The keepalives are getting missed between the Northstart and PTX.

  
  Oct 20 15:38:45.203588000 [17884] pccd_core_pce_transition_state(): Changing state of pce 'NORTHSTAR-LID' from PCE_STATE_UP to PCE_STATE_NEW <….> 
  Oct 20 15:38:45.237676000 [17884] pccd_core_send_message(): Could not send out message PCReport to PCE 'NORTHSTAR-LID' as it is in PCE_STATE_RECONNECT 
  Oct 20 15:38:49.206581000 [17884] pccd_core_pce_transition_state(): Changing state of pce 'NORTHSTAR-LID' from PCE_STATE_RECONNECT to PCE_STATE_CONNECTING 
  Oct 20 15:38:50.209594000 [17884] pccd_pcep_onmessage_cb(): onmessage objp: 0x1092680 objc: 1 msg_type:1 pce:'NORTHSTAR-LID' 
  Oct 20 15:38:50.212014000 [17884] pccd_pcep_onmessage_cb(): onmessage objp: 0xc7cad0 objc: 0 msg_type:2 pce:'NORTHSTAR-LID' 
  Oct 20 15:38:50.212055000 [17884] pccd_core_pce_transition_state(): Changing state of pce 'NORTHSTAR-LID' from PCE_STATE_CONNECTING to PCE_STATE_CONNECTED 
  Oct 20 15:38:50.212074000 [17884] pccd_core_pce_transition_state(): Changing state of pce 'NORTHSTAR-LID' from PCE_STATE_CONNECTED to PCE_STATE_SYNC
   Oct 20 15:38:50.218741000 [17884] pccd_core_report_lsp(): Sending message(s) objs 0x109a310 count: 97 to pce 'NORTHSTAR-LID' 
   Oct 20 15:38:50.223020000 [17884] pccd_core_report_lsp(): Sending message(s) objs 0x109a310 count: 96 to pce 'NORTHSTAR-LID' 
   Oct 20 15:38:50.224992000 [17884] pccd_core_report_lsp(): Sending message(s) objs 0x109a310 count: 10 to pce 'NORTHSTAR-LID' 
   Oct 20 15:38:50.225138000 [17884] pccd_core_report_empty_lsp(): Sending message objs 0x7ffd0291a4d0 count: 2 to pce 'NORTHSTAR-LID' 
   Oct 20 15:38:50.225173000 [17884] pccd_core_pce_transition_state(): Changing state of pce 'NORTHSTAR-LID' from PCE_STATE_SYNC to PCE_STATE_UP 
   Oct 20 15:39:00.206544000 [17884] pccd_core_set_new_main_pce_timer_cb(): Main PCE: 'NORTHSTAR-LID' already connected

  Workaround:

  lab@dut# deactivate protocols pcep 
  [edit]
  lab@dut# commit 
  commit complete
  [edit]
  lab@dut# rollback 1 
  load complete

  lab@dut:~$ netstat -an | grep 4189
  tcp        0      0 192.168.1.1:39323     192.168.1.2:4189     ESTABLISHED

• Remove the unwanted/not reachable controllers to avoid unnecessary keepalives interaction with the device.
• If the above doesnt help please deactivate/activate pcep and if that also doesnt help then please capture the below logs for further triaging.

• Need pcap from both the server and router to confirm if the hellos are being received or not.

      tcpdump -i <Interface used for MX communication> -s 0 -w /var/tmp/northstar_dddmmyy.pcap -C 100 -Z root -W 100 port 4189