River cannot be stopped after deleting river description

[vglafirov]

After deleting river description from _river index river cannot be stopped. It is looping until elasticsearch restart with following messages.

[2013-11-12 09:05:39,784][INFO ][org.elasticsearch.river.mongodb.MongoDBRiver] closing mongodb stream river
[2013-11-12 09:05:40,405][DEBUG][river.mongodb.util ] setRiverStatus called with RUNNING
[2013-11-12 09:05:40,416][INFO ][org.elasticsearch.river.mongodb.MongoDBRiver] About to stop river: vehiclesv1_0_7
[2013-11-12 09:05:40,417][INFO ][org.elasticsearch.river.mongodb.MongoDBRiver] closing mongodb stream river
[2013-11-12 09:05:41,417][INFO ][org.elasticsearch.river.mongodb.MongoDBRiver] About to stop river: vehicles_v1_0_7
[2013-11-12 09:05:41,418][INFO ][org.elasticsearch.river.mongodb.MongoDBRiver] closing mongodb stream river
[2013-11-12 09:05:42,420][INFO ][org.elasticsearch.river.mongodb.MongoDBRiver] About to stop river: vehicles_v1_0_7
[2013-11-12 09:05:42,420][INFO ][org.elasticsearch.river.mongodb.MongoDBRiver] closing mongodb stream river
[2013-11-12 09:05:43,425][INFO ][org.elasticsearch.river.mongodb.MongoDBRiver] About to stop river: vehicles_v1_0_7