Tag values can't end in \

[oliverrahner]

Even if escaped, a tag vaulue can't end in a backslash \

So, sending this:
h2o,city=EastCalifornia,location=a\\,region=asdf water_level=20.0 2

Results in an error:
HTTP status code: 400; Message: unable to parse 'h2o,city=EastCalifornia,location=a\\,region=asdf water_level=20.0 20': invalid tag format

This was already mentioned in an earlier version of the docs, see influxdata/docs.influxdata.com-ARCHIVE#2676, but was removed at a later point, without the restriction being removed.

Relevant URLs

• LineProtocol - tag value cannot end with "\" even if escaped docs.influxdata.com-ARCHIVE#2676
• add escaping for backslashes, fixes #718 influxdb-client-java#720