rgw fail to put elasticsearch document when compression is set
we build a radosgw multisite with one zonegroup, it contains one normal zone and one elasticsearch zone. then we create a placement policy with compression is zlib. Then we create a bucket with this placement and create objects. However, the index documents are not created for these objects. the rgw log shows, it create index document from object metadata, but documents are rejected by elasticsearch server. The elasticsearch server returns 400 error.