# Motivation
reformat property,for a http header name cannot contain the following
prohibited characters: =,;: \t\r\n\v\f
for example:
{"city=shanghai":"tag"}
when we run `bin/pulsar-admin topics get-message-by-id `, it will
throw exception, the exception is:
`Reason: java.util.concurrent.CompletionException:
org.apache.pulsar.client.admin.internal.http.AsyncHttpConnector$RetryException:
Could not complete the operation. Number of retries has been
exhausted. Failed reason: a header name cannot contain the following
prohibited characters: =,;: \t\r\n\v\f: =`
<img width="1288" alt="image"
src="https://github.com/StevenLuMT/pulsar/assets/42990025/973d95b9-4ac2-4977-b160-162c4b53a613";>
# High Level Design
In master branch,
in an http
request:getMessageById("/{tenant}/{namespace}/{topic}/ledger/{ledgerId}/entry/{entryId}"),
replace `"X-Pulsar-PROPERTY-" + msgProperties.getKey()` with
`"X-Pulsar-PROPERTY"`
After release-3.1.0, this feature begins to take effect.
