XML reserved characters are not escaped when being used in XML configuration files

[Jimvin]

Affected Stackable version

25.7

Affected Apache NiFi version

2.4.0

Current and expected behavior

When the Stackable NiFi operator takes a parameter value and uses it in one of its XML-based configuration files it does not escape reserved characters. This means that if the value contains a character such as an ampersand (&) then the result is malformed XML document that cannot be parsed, causing NiFi to fail on startup.

Possible solution

The operator should escape any reserved characters when it includes a parameter value e.g. replacing & with &.

Additional context

No response

Environment

No response

Would you like to work on fixing this bug?

None

[Jimvin]

For reference, these are the characters that must be escaped when include in XML configuration files:

<        &lt;
>        &gt;
&        &amp;
"        &quot;
'        &apos;