Can not start ElasticSearch after one day work

Hi all,
Yesterday i worked very well with ElasticSearch but this moring ,i can start it with failure notification from terminal like this.

[2013-03-27 09:48:46,084][INFO ][node ] [Sinclar, Nekra] {0.20.5}[22635]: initializing ...
[2013-03-27 09:48:46,101][INFO ][plugins ] [Sinclar, Nekra] loaded [jdbc-river], sites [bigdesk, inquisitor, browser, head]
[2013-03-27 09:48:48,906][INFO ][node ] [Sinclar, Nekra] {0.20.5}[22635]: initialized
[2013-03-27 09:48:48,906][INFO ][node ] [Sinclar, Nekra] {0.20.5}[22635]: starting ...
[2013-03-27 09:48:49,123][INFO ][transport ] [Sinclar, Nekra] bound_address {inet[/0:0:0:0:0:0:0:0:9301]}, publish_address {inet[/]}
[2013-03-27 09:48:53,227][INFO ][discovery.zen ] [Sinclar, Nekra] master_left [[Nighthawk][4wmjfZICTIG0ysQCCdO_hQ][inet[/]]], reason [do not exists on master, act as master failure]
[2013-03-27 09:48:53,230][INFO ][discovery ] [Sinclar, Nekra] elasticsearch/CWodYwtfQnidGxx8OtGIsw
[2013-03-27 09:48:53,233][INFO ][http ] [Sinclar, Nekra] bound_address {inet[/0:0:0:0:0:0:0:0:9200]}, publish_address {inet[/]}
[2013-03-27 09:48:53,233][INFO ][node ] [Sinclar, Nekra] {0.20.5}[22635]: started