Unable to parse fields having a "@" prefix inside @JsonProperty value after upgrading jackson jars to 2.17.0

[zenith7781]

Hello, I am writing this after searching in the issues but couldn't get the required information.
I am using a spring boot project and I have a job where we feed an XML as input and the application processes it and returns the output. I have upgraded Spring boot to 3.3.7 which has automatically upgraded jackson jars to 2.17.3. However post this upgradation, I am facing an issue where jackson is not able to map/serialize the fields correctly. The mapping is defined as ::

@SuppressWarnings("javadoc")
@XmlAccessorType(XmlAccessType.FIELD)
@JsonPropertyOrder({"tc", "$"})
public class CodeCommandType implements Serializable {
  private static final long serialVersionUID = 1L;
  @XmlAttribute
  @JsonProperty("@tc")
  public int tc;
 @XmlValue
  public String $;
}

Sample XML Input:

<ns:RequestBasis id="RequestBasis_1">
        <ns:BasisName>Best of Current and State Non-Forfeiture</ns:BasisName>
        <ns:InterestAssumption tc="2">Current</ns:InterestAssumption>
        <ns:GtdPayoutAmt>194.24</ns:GtdPayoutAmt>
</ns:RequestBasis>

The error is thrown as "Unrecognized field "tc" (class org.rest.of.the.package.CodeCommandType), not marked as ignorable (2 known properties: "", "@tc"]) at [Source: (StringReader); line: 7, column: 27] "

Note that this issue gets resolved if I forcefully keep jackson to 2.16.2 OR put @JsonProperty("tc") instead of @JsonProperty("@tc").

I want to know the commit/issue/changelog or any related information where this configuration was updated inside 2.17.0 release. @cowtowncoder @JooHyukKim Any help will be appreciated.

[pjfanning]

jackson-dataformat-xml is where the XML support is - not jackson-databind.

Release Notes:
https://github.com/FasterXML/jackson-dataformat-xml/blob/2.19/release-notes/VERSION-2.x

Just in case, this issue relates to a jackson-databind change, its release notes are in:
https://github.com/FasterXML/jackson-databind/blob/2.19/release-notes/VERSION-2.x

[pjfanning]

@zenith7781 I can't find any tests that have @JsonProperty("@x") or similar settings. I may have missed something but is possible that @ values in property names was only supported by accident.

[cowtowncoder]

Should first rule out this is not Spring Boot issue. Jackson has no special handling for @ in property names.

…

On Mon, Feb 17, 2025 at 1:49 PM PJ Fanning ***@***.***> wrote: @zenith7781 <https://github.com/zenith7781> I can't find any tests that have @***@***.***") or similar settings. I may have missed something but is possible that @ values in property names was only supported by accident. — Reply to this email directly, view it on GitHub <#721 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAANOGPUATRUWTAU4YUXPW32QI4OBAVCNFSM6AAAAABXJHCM4CVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMNRTHE3DMNBQGA> . You are receiving this because you were mentioned.Message ID: ***@***.***> [image: pjfanning]*pjfanning* left a comment (FasterXML/jackson-dataformat-xml#721) <#721 (comment)> @zenith7781 <https://github.com/zenith7781> I can't find any tests that have @***@***.***") or similar settings. I may have missed something but is possible that @ values in property names was only supported by accident. — Reply to this email directly, view it on GitHub <#721 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAANOGPUATRUWTAU4YUXPW32QI4OBAVCNFSM6AAAAABXJHCM4CVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMNRTHE3DMNBQGA> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[cowtowncoder]

Also: aside from Spring side, I would recommend trying out yet newer version, 2.18.2 -- 2.18 has a few fixes to Creator detection and handling.