[389-users] DS multimaster replication host crashed, will not restart

HI All one of our multmaster DS crashed over the weekend and will not restart , ther are no errors reported in DS errorlog here are details: OS: Linux .el7.x86_64 #1 SMP Tue Jun 26 16:32:21 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux 389-DS 389-ds-base-1.3.7.5-24.el7_5.x86_64 and systemctl status dirsrv(a)pldapX.service ● dirsrv(a)pldapX.service - 389 Directory Server pldapX Loaded: loaded (/usr/lib/systemd/system/dirsrv@.service; disabled; vendor preset: disabled) Active: failed (Result: signal) since Tue 2019-10-15 09:51:26 PDT; 3min 10s ago Process: 7193 ExecStart=/usr/sbin/ns-slapd -D /etc/dirsrv/slapd-%i -i /var/run/dirsrv/slapd-%i.pid (code=killed, signal=BUS) Process: 7187 ExecStartPre=/usr/sbin/ds_systemd_ask_password_acl /etc/dirsrv/slapd-%i/dse.ldif (code=exited, status=0/SUCCESS) Main PID: 7193 (code=killed, signal=BUS) and last lines from errorlog : [15/Oct/2019:10:17:29.710924472 -0700] - INFO - Security Initialization - SSL info: TLS_AES_256_GCM_SHA384: enabled [15/Oct/2019:10:17:29.719454362 -0700] - WARN - Security Initialization - SSL alert: nsTLS1 is on, but the version range is lower than "TLS1.0"; Configuring the version range as default min: TLS1.0, max: TLS1.2. [15/Oct/2019:10:17:29.719840129 -0700] - INFO - Security Initialization - slapd_ssl_init2 - Configured SSL version range: min: TLS1.0, max: TLS1.2 [15/Oct/2019:10:17:29.721517717 -0700] - INFO - main - 389-Directory/1.3.7.5 B2018.178.1311 starting up [15/Oct/2019:10:17:34.230509014 -0700] - INFO - ldbm_instance_config_cachememsize_set - force a minimal value 512000 [15/Oct/2019:10:17:34.332786785 -0700] - INFO - ldbm_instance_config_cachememsize_set - force a minimal value 512000 [15/Oct/2019:10:17:34.349651890 -0700] - NOTICE - ldbm_back_start - found 16262020k physical memory [15/Oct/2019:10:17:34.350079009 -0700] - NOTICE - ldbm_back_start - found 15225948k available [15/Oct/2019:10:17:34.350389153 -0700] - NOTICE - ldbm_back_start - total cache size: 10523508736 B; [15/Oct/2019:10:17:34.351750381 -0700] - NOTICE - dblayer_start - Detected Disorderly Shutdown last time Directory Server was running, recovering database.