When I start corosync all servers panics with core dumps

I upgraded my servers. Then I started corosync service one by one on my servers. I started first on 3 server and I wait 5 min. Then I started next 4 corosync on other servers and 7 server crashed in same time. I'm using corosync since 5 years. I was using; Kernel: 4.14.32-1-lts Corosync 2.4.2-1 Pacemaker 1.1.18-1 and I never saw this before. I guess something is broken in new corosync version really really bad! Kernel: 4.14.70-1-lts Corosync 2.4.4-3 Pacemaker 2.0.0-1 - **This is my corosync.conf: https://paste.ubuntu.com/p/7KCq8pHKn3/** **Can you tell me how can I find the reason of the problem?** Sep 25 08:56:03 SRV-2 corosync: [TOTEM ] A new membership (10.10.112.10:56) was formed. Members joined: 7 Sep 25 08:56:03 SRV-2 corosync: [VOTEQ ] Waiting for all cluster members. Current votes: 7 expected_votes: 28 Sep 25 08:56:03 SRV-2 corosync: [VOTEQ ] Waiting for all cluster members. Current votes: 7 expected_votes: 28 Sep 25 08:56:03 SRV-2 corosync: [VOTEQ ] Waiting for all cluster members. Current votes: 7 expected_votes: 28 Sep 25 08:56:03 SRV-2 corosync: [VOTEQ ] Waiting for all cluster members. Current votes: 7 expected_votes: 28 Sep 25 08:56:03 SRV-2 corosync: [QUORUM] Members: 1 2 3 4 5 6 7 Sep 25 08:56:03 SRV-2 corosync: [MAIN ] Completed service synchronization, ready to provide service. Sep 25 08:56:03 SRV-2 corosync: [VOTEQ ] Waiting for all cluster members. Current votes: 7 expected_votes: 28 Sep 25 08:56:03 SRV-2 systemd: Created slice system-systemd\x2dcoredump.slice. Sep 25 08:56:03 SRV-2 systemd: Started Process Core Dump (PID 43798/UID 0). Sep 25 08:56:03 SRV-2 systemd: corosync.service: Main process exited, code=dumped, status=11/SEGV Sep 25 08:56:03 SRV-2 systemd: corosync.service: Failed with result 'core-dump'. Sep 25 08:56:03 SRV-2 kernel: watchdog: watchdog0: watchdog did not stop! Sep 25 08:56:03 SRV-2 systemd-coredump: Process 29089 (corosync) of user 0 dumped core. Stack trace of thread 29089: #0 0x0000000000000000 n/a (n/a) Write failed: Broken pipe coredumpctl info PID: 23658 (corosync) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Mon 2018-09-24 09:50:58 +03 (1 day 3h ago) Command Line: corosync Executable: /usr/bin/corosync Control Group: /system.slice/corosync.service Unit: corosync.service Slice: system.slice Boot ID: 79d67a83f83c4804be6ded8e6bd5f54d Machine ID: 9b1ca27d3f4746c6bcfcdb93b83f3d45 Hostname: SRV-1 Storage: /var/lib/systemd/coredump/core.corosync.0.79d67a83f83c4804be6ded8e6bd5f54d.23658.153777185> Message: Process 23658 (corosync) of user 0 dumped core. Stack trace of thread 23658: #0 0x0000000000000000 n/a (n/a) PID: 5164 (corosync) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Tue 2018-09-25 08:56:03 +03 (4h 9min ago) Command Line: corosync Executable: /usr/bin/corosync Control Group: /system.slice/corosync.service Unit: corosync.service Slice: system.slice Boot ID: 2f49ec6cdcc144f0a8eb712bbfbd7203 Machine ID: 9b1ca27d3f4746c6bcfcdb93b83f3d45 Hostname: SRV-1 Storage: /var/lib/systemd/coredump/core.corosync.0.2f49ec6cdcc144f0a8eb712bbfbd7203.5164.1537854963> Message: Process 5164 (corosync) of user 0 dumped core. Stack trace of thread 5164: #0 0x0000000000000000 n/a (n/a) I cant find more log so I can't dig the problem.