topic Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata in Talend Studio

Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

gnemethartemis — Fri, 02 Jan 2026 14:45:42 GMT

Hello Everyone,

I created a simple input component which subscribes to an event bus, and produces Records based on the input.

The component works well in IntelliJ, passes the tests.

When deployed to TOS the "Guess Schema" action also works, and returns a valid schema.

However when I run the job and the first message arrives java.lang.NoClassDefFoundError: routines/system/DynamicMetadata is thrown. It happens when the runtime tries to cast the Record returned by the input component to the type created from the schema.

Does anyone have any idea, how to fix it?

I understand that the DynamicMetadata is an enterprise only feature, and I don't need it.

Thank you In Advance,

Gabor

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

Anonymous — Wed, 01 Jun 2022 04:58:30 GMT

Hi Team,

I hope you are doing good.

Is the error: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata observed when the job is run locally from the studio?

Please try to build the job and check the routines that get packaged to the .zip file.

The zip should have the Dynamic Metadata in the routines/system path.

Thanks in advance.

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

gnemethartemis — Wed, 01 Jun 2022 07:53:00 GMT

Hi asaxena,

Thank you for your reply.

Unfortunately the error is thrown both in TOS and when running as a standalone job.

I went ahead and built a schema from the studio supplied information and provide that for the RecordBuilder, but it didn't help either.

Gabor

Here is how the record is built :

------------

private Record buildRecord(Map<String, Object> source){

if (source == null) return null;

System.out.println("Building record");

buildSchema();

if (this.schema == null) System.out.println("There is NO schema defined");

else System.out.println("Schema is defined");

Record.Builder rb = this.schema == null ? builderFactory.newRecordBuilder() : builderFactory.newRecordBuilder(schema);

for (String s : source.keySet()){

Object value = source.get(s);

if (value == null) continue;

if (value instanceof String) rb.withString(s, (String)value);

else if (value instanceof Boolean) rb.withBoolean(s, (boolean)value);

else if (value instanceof Date) rb.withDateTime(s, (Date)value);

else if (value instanceof Long) rb.withLong(s, (long) value);

else if (value instanceof Float) rb.withFloat(s, (long) value);

}

return rb.build();

}

--------------------

Here is the whole output for the job:

.\connectorTest_run.ps1

outgoing schema is defined

SchemaInfo(label=__replayid__, key=true, talendType=id_Long, nullable=false, pattern=)

SchemaInfo(label=CreatedById, key=false, talendType=id_String, nullable=true, pattern=)

SchemaInfo(label=CreatedDate, key=false, talendType=id_String, nullable=true, pattern=)

SchemaInfo(label=Location__c, key=false, talendType=id_String, nullable=true, pattern=)

SchemaInfo(label=Urgent__c, key=false, talendType=id_Boolean, nullable=false, pattern=)

Handshake message

{ext={replay=true, payload.format=true}, minimumVersion=1.0, clientId=9ie1tc6txy2vktgullgebxs4j4zs, supportedConnectionTypes=[Ljava.lang.Object;@7cdb56b5, channel=/meta/handshake, id=1, version=1.0, successful=true}

Building record

Schema is defined

[statistics] disconnected

Exception in thread "main" java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

at java.base/java.lang.Class.getDeclaredMethods0(Native Method)

at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3402)

at java.base/java.lang.Class.getDeclaredMethod(Class.java:2673)

at org.talend.sdk.component.runtime.record.RecordConverters$MappingMeta.newInstance(RecordConverters.java:479)

at org.talend.sdk.component.runtime.record.RecordConverters.toType(RecordConverters.java:268)

at platformevent.connectortest_0_1.connectorTest.SfPlatformEventPlatformEventInput_1Process(connectorTest.java:838)

at platformevent.connectortest_0_1.connectorTest.runJobInTOS(connectorTest.java:1496)

at platformevent.connectortest_0_1.connectorTest.main(connectorTest.java:1327)

Caused by: java.lang.ClassNotFoundException: routines.system.DynamicMetadata

at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)

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

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

... 8 more

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

Anonymous — Wed, 01 Jun 2022 08:16:10 GMT

Please provide the following information for us to be more better evaluate the issue:

- Product version (such as Talend Cloud Real-Time Big Data Platform (7.3.120200219_1130)

- Operating System (such as Windows 10, 64 bit)

- Java version (such as Oracle JDK build 11.0.8+10-LTS)

Regards

Shong

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

gnemethartemis — Wed, 01 Jun 2022 08:29:56 GMT

Hi,

Product version: TOS_DI-20211109_1610-V8.0.1
Operating System: Windows 10 pro 64 bit,
Java version: openjdk 11.0.14.1 2022-02-08 LTS
- OpenJDK Runtime Environment Zulu11.54+25-CA (build 11.0.14.1+1-LTS)
- OpenJDK 64-Bit Server VM Zulu11.54+25-CA (build 11.0.14.1+1-LTS, mixed mode)

Best Regards,

Gabor

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

Ulrich_Wohlfeil — Wed, 21 Dec 2022 08:48:57 GMT

Hi,

I can reproduce this bug with the component kit version 1.38.6 and also the newest version 1.51.2.

Product version: TOS_DI-20211109_1610-V8.0.1
Operating System: Linux
Java version: openjdk 11.0.17 2022-10-18
Talend Component Kit 1.38.6 and 1.51.2

Currently Talend 8.x does not seem to have a compatible Talend Component Kit version.

Best regards

Uli

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

Ulrich_Wohlfeil — Wed, 21 Dec 2022 09:16:03 GMT

Update:

as expected, same problem under Windows 10.

Problem does not exists in TOS 7.3.1

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

Anonymous — Mon, 16 Jan 2023 13:12:30 GMT

Hello,

I don't have a final fixVersion but component-runtime soon will include a fix for this. So in theory once that is released you can use the latest runtime and it will be compatible with TOS as well. https://jira.talendforge.org/browse/TCOMP-2165

Sorry about the inconvenience caused!

Regards,

Balázs

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

Hieu_Trung — Wed, 13 Sep 2023 09:55:14 GMT

Hi, how can I update latest runtime to my TOS?

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

Anonymous — Wed, 13 Sep 2023 11:51:06 GMT

basically you have to build your component with the latest version of component kit runtime, as of now 1.60

https://talend.github.io/component-runtime/main/latest/index.html

That version should work with TOS 8.0 too, but some features might require Talend 8.0 with monthly release of R2023-09 as the framework itself constantly evolving.

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

Hieu_Trung — Wed, 13 Sep 2023 12:04:08 GMT

Thanks for your response, I am new to TOS and under learning phase. My TOS is 8.0, how do I update the patch to R2023-09?

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

Anonymous — Wed, 13 Sep 2023 13:05:51 GMT

Talend Open Studio doesn't have patches. Talend Cloud Data Integration a.k.a the enterprise version receives security fixes, new features on a monthly basis.

Re: Custom Input component: java.lang.NoClassDefFoundError: routines/system/DynamicMetadata

Hieu_Trung — Wed, 13 Sep 2023 13:45:18 GMT

I understand, do you have any idea on how to change the component-runtime on TOS 8.0? As I can see, my TOS is using component-runtime version 1.37.0, which is not the latest as I am using to develop my custom component (ver 1.60.0)