In the name of Allah Hello I also compiled and installed corosync 1.3.4 with gcc 4.4.4 on two VMs that are connected with bridge on Scientific Linux 6.0 with kernel version 2.6.32-71.el6.x86_64 and again I encountered the same problem. I configured corosync 1.4.2 in transport udpu state and started it on two VMs with above characteristics. They are working about 21 hours without any problems. i will keep this vms running and will report results. Corosync 1.3.4 config file: compatibility: none totem { version: 2 token: 5000 token_retransmits_before_loss_const: 20 join: 1000 consensus: 7500 vsftype: none max_messages: 20 secauth: off threads: 0 nodeid: 3 clear_node_high_bit: yes interface { ringnumber: 0 bindnetaddr: 192.168.100.0 mcastaddr: 226.94.1.1 mcastport: 5405 ttl: 1 } } logging { fileline: off to_stderr: no to_logfile: yes to_syslog: yes logfile: /var/log/cluster/corosync.log debug: on timestamp: on logger_subsys { subsys: AMF debug: on } } amf { mode: disabled } Corosync 1.3.4 log messages: Apr 3 11:52:55 VM3 corosync[6639]: [MAIN ] Corosync Cluster Engine ('1.3.4'): started and ready to provide service. Apr 3 11:52:55 VM3 corosync[6639]: [MAIN ] Corosync built-in features: Apr 3 11:52:55 VM3 corosync[6639]: [MAIN ] Successfully read main configuration file '/etc/corosync/corosync.conf'. Apr 3 11:52:55 VM3 corosync[6639]: [TOTEM ] Initializing transport (UDP/IP Multicast). Apr 3 11:52:55 VM3 corosync[6639]: [TOTEM ] Initializing transmit/receive security: libtomcrypt SOBER128/SHA1HMAC (mode 0). Apr 3 11:52:55 VM3 corosync[6639]: [TOTEM ] The network interface [192.168.100.3] is now up. Apr 3 11:52:55 VM3 corosync[6639]: [SERV ] Service engine loaded: corosync extended virtual synchrony service Apr 3 11:52:55 VM3 corosync[6639]: [SERV ] Service engine loaded: corosync configuration service Apr 3 11:52:55 VM3 corosync[6639]: [SERV ] Service engine loaded: corosync cluster closed process group service v1.01 Apr 3 11:52:55 VM3 corosync[6639]: [SERV ] Service engine loaded: corosync cluster config database access v1.01 Apr 3 11:52:55 VM3 corosync[6639]: [SERV ] Service engine loaded: corosync profile loading service Apr 3 11:52:55 VM3 corosync[6639]: [SERV ] Service engine loaded: corosync cluster quorum service v0.1 Apr 3 11:52:55 VM3 corosync[6639]: [MAIN ] Compatibility mode set to none. Using V2 of the synchronization engine. Apr 3 11:52:55 VM3 corosync[6639]: [TOTEM ] A processor joined or left the membership and a new membership was formed. Apr 3 11:52:55 VM3 corosync[6639]: [CPG ] chosen downlist: sender r(0) ip(192.168.100.3) ; members(old:0 left:0) Apr 3 11:52:55 VM3 corosync[6639]: [MAIN ] Completed service synchronization, ready to provide service. Apr 3 11:53:40 VM3 corosync[6639]: [TOTEM ] A processor joined or left the membership and a new membership was formed. Apr 3 11:53:40 VM3 corosync[6639]: [CPG ] chosen downlist: sender r(0) ip(192.168.100.3) ; members(old:1 left:0) Apr 3 11:53:40 VM3 corosync[6639]: [MAIN ] Completed service synchronization, ready to provide service. Apr 3 15:31:06 VM3 corosync[6639]: [TOTEM ] A processor failed, forming new configuration. Apr 3 15:31:06 VM3 corosync[6639]: [TOTEM ] A processor joined or left the membership and a new membership was formed. Apr 3 15:31:07 VM3 corosync[6639]: [CPG ] chosen downlist: sender r(0) ip(192.168.100.3) ; members(old:2 left:0) Apr 3 15:31:07 VM3 corosync[6639]: [MAIN ] Completed service synchronization, ready to provide service. Apr 3 15:31:26 VM3 corosync[6639]: [TOTEM ] A processor failed, forming new configuration. Apr 3 15:31:34 VM3 corosync[6639]: [TOTEM ] A processor joined or left the membership and a new membership was formed. Apr 3 15:31:34 VM3 corosync[6639]: [CPG ] chosen downlist: sender r(0) ip(192.168.100.3) ; members(old:2 left:0) Apr 3 15:31:34 VM3 corosync[6639]: [MAIN ] Completed service synchronization, ready to provide service. Corosync 1.4.2 config File: compatibility: none totem { version: 2 token: 5000 token_retransmits_before_loss_const: 20 join: 1000 consensus: 7500 vsftype: none max_messages: 20 secauth: off threads: 0 nodeid: 1 clear_node_high_bit: yes transport: udpu interface { member { memberaddr: 192.168.100.1 } member { memberaddr: 192.168.100.2 } ringnumber: 0 bindnetaddr: 192.168.100.0 mcastaddr: 226.94.1.1 mcastport: 5405 ttl: 1 } } logging { fileline: off to_stderr: no to_logfile: yes to_syslog: yes logfile: /var/log/cluster/corosync.log debug: on } } amf { mode: disabled } Corosync 1.4.2 log messages: Apr 3 11:32:41 VM1 corosync[1711]: [MAIN ] Corosync Cluster Engine ('1.4.2'): started and ready to provide service. Apr 3 11:32:41 VM1 corosync[1711]: [MAIN ] Corosync built-in features: Apr 3 11:32:41 VM1 corosync[1711]: [MAIN ] Successfully read main configuration file '/etc/corosync/corosync.conf'. Apr 3 11:32:41 VM1 corosync[1711]: [TOTEM ] Initializing transport (UDP/IP Unicast). Apr 3 11:32:41 VM1 corosync[1711]: [TOTEM ] Initializing transmit/receive security: libtomcrypt SOBER128/SHA1HMAC (mode 0). Apr 3 11:32:41 VM1 corosync[1711]: [TOTEM ] The network interface [192.168.100.1] is now up. Apr 3 11:32:41 VM1 corosync[1711]: [SERV ] Service engine loaded: corosync extended virtual synchrony service Apr 3 11:32:41 VM1 corosync[1711]: [SERV ] Service engine loaded: corosync configuration service Apr 3 11:32:41 VM1 corosync[1711]: [SERV ] Service engine loaded: corosync cluster closed process group service v1.01 Apr 3 11:32:41 VM1 corosync[1711]: [SERV ] Service engine loaded: corosync cluster config database access v1.01 Apr 3 11:32:41 VM1 corosync[1711]: [SERV ] Service engine loaded: corosync profile loading service Apr 3 11:32:41 VM1 corosync[1711]: [SERV ] Service engine loaded: corosync cluster quorum service v0.1 Apr 3 11:32:41 VM1 corosync[1711]: [MAIN ] Compatibility mode set to none. Using V2 of the synchronization engine. Apr 3 11:32:41 VM1 corosync[1711]: [TOTEM ] A processor joined or left the membership and a new membership was formed. Apr 3 11:32:41 VM1 corosync[1711]: [CPG ] chosen downlist: sender r(0) ip(192.168.100.1) ; members(old:0 left:0) Apr 3 11:32:41 VM1 corosync[1711]: [MAIN ] Completed service synchronization, ready to provide service. Apr 3 11:33:21 VM1 corosync[1711]: [TOTEM ] A processor joined or left the membership and a new membership was formed. Apr 3 11:33:21 VM1 corosync[1711]: [CPG ] chosen downlist: sender r(0) ip(192.168.100.1) ; members(old:1 left:0) Apr 3 11:33:21 VM1 corosync[1711]: [MAIN ] Completed service synchronization, ready to provide service. _______________________________________________ discuss mailing list discuss@xxxxxxxxxxxx http://lists.corosync.org/mailman/listinfo/discuss