collection.flush() getting failed

[navneetrajput06]

Hi team,
Could you please help me in resolve below issue.

collection.flush()
E0807 17:41:46.652831000 6266368000 hpack_parser.cc:999] Error parsing 'content-type' metadata: invalid value
E0807 17:42:46.733381000 6266368000 hpack_parser.cc:999] Error parsing 'content-type' metadata: invalid value
E0807 17:43:46.838769000 6266368000 hpack_parser.cc:999] Error parsing 'content-type' metadata: invalid value

4:51

[yhmo]

Similar issues:
#29096

It is a grpc level error, maybe related to reverse proxy:
grpc/grpc#29706