I am importing data from a csv -> logstash -> elasticsearch and about 1% of my data ends up vanishing.
Logstash doesn't have anything showing up in the logs.
However elasticsearch is showing this error for each missing piece of data.
[2017-08-09T13:31:17,720][DEBUG][o.e.a.b.TransportShardBulkAction] [z61oeaJ] [property] failed to execute bulk item (update) BulkShardRequest [[property]] containing  requests org.elasticsearch.index.mapper.MapperParsingException: failed to parse at.org.elasticsearch... ... ... Caused by: java.lang.IllegalArgumentException: Malformed content, found extra data after parsing: FIELD_NAME
I later added some code to remove fields with null values and last line of my error switched to.
Caused by: java.lang.IllegalArgumentException: Malformed content, found extra data after parsing: END_OBJECT
I tried upping my logging levels... but I can't seem to get any more information than this. Is there any way to know which field is the problem?