Illegal state exception in Ki bana logs on rollup

[bhavyarm]

Kibana version: alpha2

Elasticsearch version: alpha2

Original install method (e.g. download page, yum, from source, etc.): from staging

Describe the bug: Kibana logs this error on rollups continuously in logs:

 error  [14:40:16.887]  [illegal_state_exception] parser for [_doc] did not end on END_OBJECT :: {"path":"/_all/_xpack/rollup/data","query":{},"statusCode":500,"response":"{\"error\":{\"root_cause\":[{\"type\":\"illegal_state_exception\",\"reason\":\"parser for [_doc] did not end on END_OBJECT\"}],\"type\":\"illegal_state_exception\",\"reason\":\"parser for [_doc] did not end on END_OBJECT\"},\"status\":500}"}
    at respond (/Users/bhavyarajumandya/Desktop/latest_snapshot_folder/kibana-7.0.0-SNAPSHOT-darwin-x86_64/node_modules/elasticsearch/src/lib/transport.js:308:15)
    at checkRespForFailure (/Users/bhavyarajumandya/Desktop/latest_snapshot_folder/kibana-7.0.0-SNAPSHOT-darwin-x86_64/node_modules/elasticsearch/src/lib/transport.js:267:7)
    at HttpConnector.<anonymous> (/Users/bhavyarajumandya/Desktop/latest_snapshot_folder/kibana-7.0.0-SNAPSHOT-darwin-x86_64/node_modules/elasticsearch/src/lib/connectors/http.js:165:7)
    at IncomingMessage.wrapper (/Users/bhavyarajumandya/Desktop/latest_snapshot_folder/kibana-7.0.0-SNAPSHOT-darwin-x86_64/node_modules/elasticsearch/node_modules/lodash/lodash.js:4935:19)
    at IncomingMessage.emit (events.js:187:15)
    at endReadableNT (_stream_readable.js:1094:12)
    at process._tickCallback (internal/process/next_tick.js:63:19)

[elasticmachine]

Pinging @elastic/es-ui

[polyfractal]

Upstream elastic/elasticsearch#36726 just closed with a fix (master, 6.6, 6.5.5) so this should hopefully be fixed now :)

[jen-huang]

Closing as this has been fixed from ES side.