recreate problem with updating refresh_interval at runtime

refresh_interval_problem.sh

# Run this on a completely vanilla, fresh instance of elasticsearch 0.19.x


# Create index with initial -1 refresh interval.
curl -XPUT 'http://localhost:9200/twitter/?pretty=true' -d '
index :
    refresh_interval: "-1"
'

# Update refresh interval using update settings to 1s.
curl -XPUT localhost:9200/twitter/_settings?pretty=true -d '{
    "index" : {
        "refresh_interval" : "1s"
    }
}'

# "Get Settings" reports that it has been changed.
curl -XGET localhost:9200/twitter/_settings?pretty=true

# Add item to index.
curl -XPUT 'http://localhost:9200/twitter/tweet/1?pretty=true' -d '{
    "user" : "kimchy",
    "post_date" : "2009-11-15T14:12:12",
    "message" : "trying out Elastic Search"
}'

# Can't find it.
curl -XGET 'http://localhost:9200/twitter/tweet/_search?pretty=true'


#########################
# Restart elasticsearch #
#########################


# Now we see the item we added.
curl -XGET 'http://localhost:9200/twitter/tweet/_search?pretty=true'

# Add another item to index.
curl -XPUT 'http://localhost:9200/twitter/tweet/2?pretty=true' -d '{
    "user" : "kimchy",
    "post_date" : "2009-11-15T17:12:12",
    "message" : "Elastic Search rocks!"
}'

# See both items.
curl -XGET 'http://localhost:9200/twitter/tweet/_search?pretty=true'