ES 0.19.8 shard recovery failure

gistfile1.txt

[2012-07-01 23:03:47,754][WARN ][indices.cluster          ] [node5] [ranking_index][8] failed to start shard
org.elasticsearch.index.gateway.IndexShardGatewayRecoveryException: [ranking_index][8] failed recovery
	at org.elasticsearch.index.gateway.IndexShardGatewayService$1.run(IndexShardGatewayService.java:228)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:636)
Caused by: org.elasticsearch.index.engine.EngineCreationFailureException: [ranking_index][8] Failed to create engine
	at org.elasticsearch.index.engine.robin.RobinEngine.start(RobinEngine.java:251)
	at org.elasticsearch.index.shard.service.InternalIndexShard.start(InternalIndexShard.java:272)
	at org.elasticsearch.index.gateway.local.LocalIndexShardGateway.recover(LocalIndexShardGateway.java:180)
	at org.elasticsearch.index.gateway.IndexShardGatewayService$1.run(IndexShardGatewayService.java:177)
	... 3 more
Caused by: java.io.FileNotFoundException: _kutg.fnm
	at org.elasticsearch.index.store.Store$StoreDirectory.openInput(Store.java:515)
	at org.apache.lucene.index.FieldInfos.<init>(FieldInfos.java:71)
	at org.apache.lucene.index.IndexWriter.getFieldInfos(IndexWriter.java:1212)
	at org.apache.lucene.index.IndexWriter.getCurrentFieldInfos(IndexWriter.java:1228)
	at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1161)
	at org.apache.lucene.index.XIndexWriter.<init>(XIndexWriter.java:17)
	at org.elasticsearch.index.engine.robin.RobinEngine.createWriter(RobinEngine.java:1301)
	at org.elasticsearch.index.engine.robin.RobinEngine.start(RobinEngine.java:249)
	... 6 more
[2012-07-01 23:03:47,756][WARN ][cluster.action.shard     ] [node5] sending failed shard for [ranking_index][8], node[cDTfN6pBRZmtk8wVAx5aOA], [P], s[INITIALIZING], reason [Failed to start shard, message [IndexShardGatewayRecoveryException[[ranking_index][8] failed recovery]; nested: EngineCreationFailureException[[ranking_index][8] Failed to create engine]; nested: FileNotFoundException[_kutg.fnm]; ]]
[2012-07-01 23:03:47,784][WARN ][indices.cluster          ] [node5] [ranking_index][6] failed to start shard
org.elasticsearch.index.gateway.IndexShardGatewayRecoveryException: [ranking_index][6] shard allocated for local recovery (post api), should exists, but doesn't
	at org.elasticsearch.index.gateway.local.LocalIndexShardGateway.recover(LocalIndexShardGateway.java:120)
	at org.elasticsearch.index.gateway.IndexShardGatewayService$1.run(IndexShardGatewayService.java:177)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:636)