为什么快照失败，错误：指数没有主碎片+ ]

当我尝试拍摄快照时失败，出现以下错误：

{ snapshot: { snapshot: '1430395938305_3032015', indices: ['myindex'], state: 'FAILED', reason: 'Indices don\'t haveprimaryshards+[ [ myindex ]] ', start_time: '2015-04-30T12: 12: 18.435Z', start_time_in_millis: 1430395938435, end_time: '2015-04-30T12: 12: 18.525Z', end_time_in_millis: 1430395938525, duration_in_millis: 90, failures: [], shards: { total: 0, failed: 0, successful: 0 } } } 

任何人都可以知道它有什么问题吗？

这是我的集群健康

  { "cluster_name" : "elasticsearch", "status" : "red", "timed_out" : false, "number_of_nodes" : 1, "number_of_data_nodes" : 1, "active_primary_shards" : 95, "active_shards" : 95, "relocating_shards" : 0, "initializing_shards" : 0, "unassigned_shards" : 138 } 

当我检查我的群集的健康以上是结果

 index shard prirep state docs store ip node myindex 2 p STARTED 340 152.9kb 192.168.0.120 Raman myindex 2 r UNASSIGNED myindex 0 p UNASSIGNED myindex 0 r UNASSIGNED myindex 3 p STARTED 262 166.9kb 192.168.0.120 Raman myindex 3 r UNASSIGNED myindex 1 p UNASSIGNED myindex 1 r UNASSIGNED myindex 4 p STARTED 279 170.4kb 192.168.0.120 Raman myindex 4 r UNASSIGNED 

当我执行/ _cat / shards / myindex？时，我得到了这个结果