We just released Mapper Attachment plugin 1.9.0 for Elasticsearch: https://github.com/elasticsearch/elasticsearch-mapper-attachments/
What's in it?
If you define a multifield mapping, it's not overwritten any more: #37
If you define a string mapping for the date field, it's not overwritten any more: #39
We upgrade to Tika 1.4: #36
ignore_errors to not fail when parsing document and metadata: #38 and #18
content_length field: #26
Fix #21: Tika may "hang up" client application
Thanks to all contributors and bug reporters!