topic Re: Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML in Installing and Upgrading

Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML1_0Parser cannot access class com.sun.org.apache.xerces.internal.parsers.SAXParser (in module java.xml)

babarr38 — Fri, 15 Nov 2024 22:55:40 GMT

Hello,

I am trying to make a script : from the data of a table, generates information in JSON format intended to enter POST of a Rest API.

For the moment, I try to generate the json format of the data.

For this, I followed the following process : https://help.talend.com/r/atTvdntoupqchAynyb03~Q/HEM67TFAw5wcWyeutC5UMg

with

and

When I execute a job, I have the error :

Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML1_0Parser (in unnamed module @0x562e5de8) cannot access class com.sun.org.apache.xerces.internal.parsers.SAXParser (in module java.xml) because module java.xml does not export com.sun.org.apache.xerces.internal.parsers to unnamed module @0x562e5de8

at java.base/java.lang.ClassLoader.defineClass1(Native Method)

at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1012)

at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150)

at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:862)

at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:760)

at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:681)

at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:639)

at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)

at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)

at java.base/java.lang.Class.forName0(Native Method)

at java.base/java.lang.Class.forName(Class.java:375)

at nu.xom.Builder.findParser(Unknown Source)

at nu.xom.Builder.<init>(Unknown Source)

at net.sf.json.xml.XMLSerializer.read(XMLSerializer.java:374)

at pegase_talend_api_base_locale.job_api_ref_maj_type_objet_formation_0_1.job_api_ref_maj_type_objet_formation.tWriteJSONField_1_InProcess(job_api_ref_maj_type_objet_formation.java:3223)

at pegase_talend_api_base_locale.job_api_ref_maj_type_objet_formation_0_1.job_api_ref_maj_type_objet_formation$1ThreadXMLField_tWriteJSONField_1_Out.run(job_api_ref_maj_type_objet_formation.java:1964)

The librairie for use this composant are installed

I work with Java jdk 17 and talend studio 8.0.1

Do you have an idea why this error is genered ?

Thanks

Re: Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML1_0Parser cannot access class com.sun.org.apache.xerces.internal.parsers.SAXParser (in module java.xml)

Anonymous — Fri, 13 May 2022 04:36:02 GMT

Java 17 is not a compatible Java version, please use Java 8 or 11, for details, please refer to the installation documentation page.

Regards

Shong

Re: Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML1_0Parser cannot access class com.sun.org.apache.xerces.internal.parsers.SAXParser (in module java.xml)

babarr38 — Fri, 13 May 2022 05:48:21 GMT

Hello,

Thanks a lot of.

I installed java version 11 and it works

Have a good day,

Re: Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML1_0Parser cannot access class com.sun.org.apache.xerces.internal.parsers.SAXParser (in module java.xml)

GPHemsley-RELX — Tue, 09 Aug 2022 21:11:35 GMT

Note that it is still possible to get this error on Java 11 if running with `--illegal-access=deny`.

A newer version of the xom library (1.3.7) is available that reportedly does not have this problem and is fully backwards compatible. (As shown in the screenshot, Talend has bundled xom 1.2.7.)

https://github.com/elharo/xom/releases/tag/v1.3.7

As a workaround, the following override flags can be used at runtime:

--add-exports='java.xml/com.sun.org.apache.xerces.internal.parsers=ALL-UNNAMED'

--add-exports='java.xml/com.sun.org.apache.xerces.internal.util=ALL-UNNAMED'

Re: Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML1_0Parser cannot access class com.sun.org.apache.xerces.internal.parsers.SAXParser (in module java.xml)

Lord-Vader — Thu, 15 Jun 2023 08:19:01 GMT

UPDATE To this post. I encountered this error too today.

My machine: JDK 19, talend version 8.0.1, xom-1.2.7(default)

For search purposes ERROR: Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML1_0Parser (in unnamed module @0x57baeedf) cannot access class in talend com.sun.org.apache.xerces.internal.parsers.SAXParser (in module java.xml) because module java.xml does not export com.sun.org.apache.xerces.internal.parsers to unnamed module @0x57baeedf.

I downloaded the latest XOM-jar(currently 1.3.9) file : https://mvnrepository.com/artifact/xom/xom/1.3.9 and it works fine.

Changing the module: https://help.talend.com/r/en-US/8.0/studio-user-guide/overriding-external-modules-by-customizing-mvn-uri

Hope this helps someone.

Vader Out 💪.

Re: Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML1_0Parser cannot access class com.sun.org.apache.xerces.internal.parsers.SAXParser (in module java.xml)

babarr38 — Thu, 15 Jun 2023 13:37:00 GMT

Hello,

I propose to you this idea because we have this probleme again when a new person works with this composant.

We make a little script .bat to force Talend to work with java 11

It is a follow little script

cd "write directory of Talend soft ex C:\...\Talend\TOS_DI-8.0.1\studio"

TOS_DI-win-x86_64.exe -vm "write directorie of java 11 ex : "C:\...\jdk-11\bin"

This is with this script that we run talend

Have a good day

Re: Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML

august1 — Fri, 22 Mar 2024 08:36:55 GMT

Hello,

This is now 2024 and Java 17 is officially supported. However I still got the same error.

Is the solution proposed by Lord-Vador (changing the MVN module with the latest XOM-jar) still what I should do ?

Have a nice day,

Re: Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML

Xiaodi_Shi — Fri, 22 Mar 2024 09:31:12 GMT

Hello,

We have added support for JDK 17 from R2023-10 onwards.

If you have installed the 8.0 R2022-12 Talend Studio monthly update or a later one provided by Talend, you can configure whether to allow Jobs to access internal Java fields and methods in Talend Studio.

Here is our online documentation about:

https://help.talend.com/r/en-US/8.0/studio-user-guide/setting-compiler-compliance-level

Note: The java version used to execute the job from Studio with "Target exec" = localhost depends on the java interpreter set in preferences (And do NOT depends on the Java version used by the Studio itself)
So even if the Studio is using Java 17 for itself , you'll need to check this option if you want to run jobs with Java 17

Best regards

Sabrina

Re: Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML

august1 — Fri, 22 Mar 2024 09:57:04 GMT

Thanks a lot, that was the solution, enabling the Java 17 compatibility was the key !

(I am running the version R2024-01 )

Re: Error on tWriteJSONFields Exception in thread "main" java.lang.IllegalAccessError: superclass access check failed: class nu.xom.JDK15XML

wei_guo — Thu, 21 Aug 2025 02:17:13 GMT

Per JDK 17 Supported Talend Studio :

Possible Solution :

Studio ->Project setting -> Build-> Java version-> Module access Settings-> Custom:

GLOBAL=java.xml/com.sun.org.apache.xerces.internal.parsers,java.xml/com.sun.org.apache.xerces.internal.util

Ref: https://bugs.openjdk.org/browse/JDK-8152901