The following Maven Settings XML
<settings>
<servers>
<server>
<id>maven-snapshots</id>
<configuration>
<httpHeaders>
<property>
<name>X-JFrog-Art-Api</name>
<value>myApiToken</value>
</property>
</httpHeaders>
</configuration>
</server>
</servers>
</settings>is generated as such a string during jackson serialization
<settings>
<servers>
<server>
<id>maven-snapshots</id>
<configuration>
<httpHeaders>
<name>X-JFrog-Art-Api</name>
<value>myApiToken</value>
</httpHeaders>
<timeout>10000</timeout>
</configuration>
</server>
</servers>
</settings>The problem is certainly occurring with the Java class definition of MavenSettingsSimplified !