Wait a minute, I got error message about 10 minutes after the following command and the transfer to MongoDB is also failed.
-----------------------------------------------------------error message---------------------------------------------------------------------------------------
2013-05-07 18:51:08 +0900 [warn]: temporarily failed to flush the buffer, next retry will be at 2013-05-07 18:51:09 +0900. error="undefined method `has_key?' for #<Array:0x007f35776d1b78>" instance=69933860183560
2013-05-07 18:51:08 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/bson-1.8.4/lib/bson/types/object_id.rb:75:in `create_pk'
2013-05-07 18:51:08 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `block in insert'
2013-05-07 18:51:08 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `collect!'
2013-05-07 18:51:08 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `insert'
2013-05-07 18:51:08 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:117:in `operate'
2013-05-07 18:51:08 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:107:in `write'
2013-05-07 18:51:08 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:290:in `write_chunk'
2013-05-07 18:51:08 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:274:in `pop'
2013-05-07 18:51:08 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:294:in `try_flush'
2013-05-07 18:51:08 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:121:in `run'
2013-05-07 18:51:10 +0900 [warn]: temporarily failed to flush the buffer, next retry will be at 2013-05-07 18:51:10 +0900. error="undefined method `has_key?' for #<Array:0x007f3578afe628>" instance=69933860183560
2013-05-07 18:51:10 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/bson-1.8.4/lib/bson/types/object_id.rb:75:in `create_pk'
2013-05-07 18:51:10 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `block in insert'
2013-05-07 18:51:10 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `collect!'
2013-05-07 18:51:10 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `insert'
2013-05-07 18:51:10 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:117:in `operate'
2013-05-07 18:51:10 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:107:in `write'
2013-05-07 18:51:10 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:290:in `write_chunk'
2013-05-07 18:51:10 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:274:in `pop'
2013-05-07 18:51:10 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:294:in `try_flush'
2013-05-07 18:51:10 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:121:in `run'
2013-05-07 18:51:11 +0900 [warn]: temporarily failed to flush the buffer, next retry will be at 2013-05-07 18:51:15 +0900. error="undefined method `has_key?' for #<Array:0x007f3578b111b0>" instance=69933860183560
2013-05-07 18:51:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/bson-1.8.4/lib/bson/types/object_id.rb:75:in `create_pk'
2013-05-07 18:51:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `block in insert'
2013-05-07 18:51:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `collect!'
2013-05-07 18:51:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `insert'
2013-05-07 18:51:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:117:in `operate'
2013-05-07 18:51:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:107:in `write'
2013-05-07 18:51:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:290:in `write_chunk'
2013-05-07 18:51:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:274:in `pop'
2013-05-07 18:51:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:294:in `try_flush'
2013-05-07 18:51:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:121:in `run'
2013-05-07 18:51:16 +0900 [warn]: temporarily failed to flush the buffer, next retry will be at 2013-05-07 18:51:22 +0900. error="undefined method `has_key?' for #<Array:0x007f3578b17f38>" instance=69933860183560
2013-05-07 18:51:16 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/bson-1.8.4/lib/bson/types/object_id.rb:75:in `create_pk'
2013-05-07 18:51:16 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `block in insert'
2013-05-07 18:51:16 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `collect!'
2013-05-07 18:51:16 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `insert'
2013-05-07 18:51:16 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:117:in `operate'
2013-05-07 18:51:16 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:107:in `write'
2013-05-07 18:51:16 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:290:in `write_chunk'
2013-05-07 18:51:16 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:274:in `pop'
2013-05-07 18:51:16 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:294:in `try_flush'
2013-05-07 18:51:16 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:121:in `run'
2013-05-07 18:51:23 +0900 [warn]: temporarily failed to flush the buffer, next retry will be at 2013-05-07 18:51:37 +0900. error="undefined method `has_key?' for #<Array:0x007f35792e6b88>" instance=69933860183560
2013-05-07 18:51:23 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/bson-1.8.4/lib/bson/types/object_id.rb:75:in `create_pk'
2013-05-07 18:51:23 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `block in insert'
2013-05-07 18:51:23 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `collect!'
2013-05-07 18:51:23 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `insert'
2013-05-07 18:51:23 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:117:in `operate'
2013-05-07 18:51:23 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:107:in `write'
2013-05-07 18:51:23 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:290:in `write_chunk'
2013-05-07 18:51:23 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:274:in `pop'
2013-05-07 18:51:23 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:294:in `try_flush'
2013-05-07 18:51:23 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:121:in `run'
2013-05-07 18:51:38 +0900 [warn]: temporarily failed to flush the buffer, next retry will be at 2013-05-07 18:52:12 +0900. error="undefined method `has_key?' for #<Array:0x007f3578b10990>" instance=69933860183560
2013-05-07 18:51:38 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/bson-1.8.4/lib/bson/types/object_id.rb:75:in `create_pk'
2013-05-07 18:51:38 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `block in insert'
2013-05-07 18:51:38 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `collect!'
2013-05-07 18:51:38 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `insert'
2013-05-07 18:51:38 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:117:in `operate'
2013-05-07 18:51:38 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:107:in `write'
2013-05-07 18:51:38 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:290:in `write_chunk'
2013-05-07 18:51:38 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:274:in `pop'
2013-05-07 18:51:38 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:294:in `try_flush'
2013-05-07 18:51:38 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:121:in `run'
2013-05-07 18:52:13 +0900 [warn]: temporarily failed to flush the buffer, next retry will be at 2013-05-07 18:53:08 +0900. error="undefined method `has_key?' for #<Array:0x007f35774ceec0>" instance=69933860183560
2013-05-07 18:52:13 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/bson-1.8.4/lib/bson/types/object_id.rb:75:in `create_pk'
2013-05-07 18:52:13 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `block in insert'
2013-05-07 18:52:13 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `collect!'
2013-05-07 18:52:13 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `insert'
2013-05-07 18:52:13 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:117:in `operate'
2013-05-07 18:52:13 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:107:in `write'
2013-05-07 18:52:13 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:290:in `write_chunk'
2013-05-07 18:52:13 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:274:in `pop'
2013-05-07 18:52:13 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:294:in `try_flush'
2013-05-07 18:52:13 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:121:in `run'
2013-05-07 18:53:09 +0900 [warn]: temporarily failed to flush the buffer, next retry will be at 2013-05-07 18:55:10 +0900. error="undefined method `has_key?' for #<Array:0x007f3578a2ee28>" instance=69933860183560
2013-05-07 18:53:09 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/bson-1.8.4/lib/bson/types/object_id.rb:75:in `create_pk'
2013-05-07 18:53:09 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `block in insert'
2013-05-07 18:53:09 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `collect!'
2013-05-07 18:53:09 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `insert'
2013-05-07 18:53:09 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:117:in `operate'
2013-05-07 18:53:09 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:107:in `write'
2013-05-07 18:53:09 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:290:in `write_chunk'
2013-05-07 18:53:09 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:274:in `pop'
2013-05-07 18:53:09 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:294:in `try_flush'
2013-05-07 18:53:09 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:121:in `run'
2013-05-07 18:55:11 +0900 [warn]: temporarily failed to flush the buffer, next retry will be at 2013-05-07 18:59:36 +0900. error="undefined method `has_key?' for #<Array:0x007f35789a5218>" instance=69933860183560
2013-05-07 18:55:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/bson-1.8.4/lib/bson/types/object_id.rb:75:in `create_pk'
2013-05-07 18:55:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `block in insert'
2013-05-07 18:55:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `collect!'
2013-05-07 18:55:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/mongo-1.8.4/lib/mongo/collection.rb:373:in `insert'
2013-05-07 18:55:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:117:in `operate'
2013-05-07 18:55:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluent-plugin-mongo-0.7.0/lib/fluent/plugin/out_mongo.rb:107:in `write'
2013-05-07 18:55:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:290:in `write_chunk'
2013-05-07 18:55:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/buffer.rb:274:in `pop'
2013-05-07 18:55:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:294:in `try_flush'
2013-05-07 18:55:11 +0900 [warn]: /usr/lib64/fluent/ruby/lib/ruby/gems/1.9.1/gems/fluentd-0.10.33/lib/fluent/output.rb:121:in `run'