An empty sequence is not allowed as the value of variable $attachment-mediatypes

AUROJIT BASAK

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Mar 10, 2026, 7:19:32 PM (6 days ago) Mar 10

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I am using the image orbeon/orbeon-forms:2025.1-pe and using MySQL server as a database.

orbeon.xml:

<Context path="/orbeon">
<Resource
name="jdbc/mysql"
driverClassName="com.mysql.cj.jdbc.Driver"

auth="Container"
type="javax.sql.DataSource"

initialSize="3"
maxActive="10"
maxIdle="10"
maxWait="30000"

poolPreparedStatements="true"

testOnBorrow="true"
validationQuery="select 1"

username="orbeon"
password="XXXXXX"
url="jdbc:mysql://mysql-instance:3306/orbeon"/>

</Context>

properties-prod.xml:

<properties xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:oxf="http://www.orbeon.com/oxf/processors">
<property as="xs:string" name="oxf.crypto.password" value="change-password"/>
<property as="xs:string" name="oxf.fr.persistence.provider.*.*.*" value="mysql"/>
<property as="xs:boolean" name="oxf.fr.persistence.sqlite.active" value="false"/>
</properties>

DDL I have used is here : https://github.com/orbeon/orbeon-forms/blob/master/form-runner/jvm/src/main/resources/apps/fr/persistence/relational/ddl/2025.1/mysql-2025_1.sql

My Dockerfile

FROM orbeon/orbeon-forms:2025.1-pe

USER root
RUN apt-get update && apt-get install -y wget

RUN mkdir -p /tmp/orbeon
WORKDIR /tmp/orbeon

# JDBC driver for MySQL
RUN wget https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-j-9.0.0.tar.gz \
&& tar xvfz mysql-connector-j-9.0.0.tar.gz \
&& mv mysql-connector-j-9.0.0/mysql-connector-j-9.0.0.jar /usr/local/tomcat/lib/

# Remove SQLite database and JDBC driver (optional)
RUN rm -f /usr/local/tomcat/webapps/orbeon/WEB-INF/orbeon-demo.sqlite \
&& rm -f /usr/local/tomcat/webapps/orbeon/WEB-INF/lib/sqlite-jdbc-*.jar

# Remove PostgreSQL JDBC driver (optional)
RUN rm -f /usr/local/tomcat/lib/postgresql-*.jar

RUN rm -rf /var/lib/apt/lists/*

# Cleanup
RUN rm -rf /tmp/orbeon

COPY license.xml /usr/local/tomcat/webapps/orbeon/WEB-INF/resources/config/
COPY properties-prod.xml /usr/local/tomcat/webapps/orbeon/WEB-INF/resources/config/
COPY orbeon.xml /usr/local/tomcat/conf/Catalina/localhost/

Schema, tables everything is there in mysql database and from the container database also connected. But when I running the orbeon container I am getting this error:

2026-03-10T22:04:39,083 - 86 - INFO lifecycle - event: {"request": "2", "session": "A550BDA573EE2E7D2E930F13582E1A81", "source": "service", "message": "start: handle"}
2026-03-10T22:04:39,083 - 86 - INFO ProcessorService - Start request: GET /orbeon/fr/
2026-03-10T22:04:39,843 - 86 - ERROR XSLTTransformer - Error at line 1097 of oxf:/apps/fr/components/components.xsl:
An empty sequence is not allowed as the value of variable $attachment-mediatypes
2026-03-10T22:04:39,853 - 86 - ERROR PageFlowControllerProcessor - error caught {controller: "oxf:/apps/fr/page-flow.xml", method: "GET", path: "/fr/"}
2026-03-10T22:04:39,876 - 86 - ERROR PageFlowControllerProcessor -
+----------------------------------------------------------------------------------------------------------------------+
|An Error has Occurred |
|----------------------------------------------------------------------------------------------------------------------|
|An empty sequence is not allowed as the value of variable $attachment-mediatypes |
|----------------------------------------------------------------------------------------------------------------------|
|Application Call Stack |
|----------------------------------------------------------------------------------------------------------------------|
|oxf:/apps/fr/components/components.xsl | |1097|
|oxf:/apps/fr/page-flow.xml |reading page view data output | 260|
|······················································································································|
|element=<page id="fr-landing" path="/fr/" model="landing/landing.xhtml" view="html-view.xpl" default-submission="reque|
|st-parameters.xml">[...]</page> |
|page id=fr-landing |
|view =html-view.xpl |
|----------------------------------------------------------------------------------------------------------------------|
|oxf:/apps/fr/html-view.xpl |reading processor output | 34|
|······················································································································|
|element=<p:output name="data" ref="data"/> |
|name =data |
|ref =data |
|----------------------------------------------------------------------------------------------------------------------|
|oxf:/apps/fr/unroll-form.xpl |reading processor output | 107|
|······················································································································|
|element=<p:output name="data" ref="data"/> |
|name =data |
|ref =data |
|----------------------------------------------------------------------------------------------------------------------|
|oxf:/apps/fr/unroll-form.xpl |reading processor output | 95|
|······················································································································|
|element=<p:output name="data" id="after-components"/> |
|name =data |
|id =after-components |
|----------------------------------------------------------------------------------------------------------------------|
|oxf:/apps/fr/components/components.xsl |executing XSLT transformation |1097|
|----------------------------------------------------------------------------------------------------------------------|
|Exception: org.orbeon.saxon.trans.XPathException |
|----------------------------------------------------------------------------------------------------------------------|
|org.orbeon.saxon.expr.CardinalityCheckingIterator |typeError | | 120|
|org.orbeon.saxon.expr.CardinalityCheckingIterator |<init> | | 47|
|org.orbeon.saxon.expr.CardinalityChecker |iterate | | 171|
|org.orbeon.saxon.expr.ExpressionTool |evaluate | | 308|
|org.orbeon.saxon.instruct.GlobalVariable |getSelectValue | | 209|
|org.orbeon.saxon.instruct.GlobalVariable |evaluateVariable | | 233|
How to solve this?

Alessandro Vernet

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Mar 10, 2026, 10:31:05 PM (6 days ago) Mar 10

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Hi Aurojit,

The issue is caused by your properties file being named `properties-prod.xml`, which overrides a critical internal file. That internal file includes several properties files, including `properties-form-runner.xml`, where the property used for `$attachment-mediatypes` is declared. This is why you are seeing the error.

I recommend the following:

- Rename `properties-prod.xml` to `properties-local.xml`.
- Update your `Dockerfile` to use `COPY properties-local.xml` instead of `COPY properties-prod.xml`.

Please let me know if this works for you.

-Alex

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AUROJIT BASAK

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Mar 14, 2026, 5:16:24 PM (2 days ago) Mar 14

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Hi Alex,

Apology for delayed reply.

Thank you for your help. After renaming the file it is working fine.

Regards,

Aurojit

To view this discussion visit https://groups.google.com/d/msgid/orbeon/CANrzKkmBUOEwD%2BSGQP-bsyC6ogemRmfyaWtxqa%3D9FaRskvsEfA%40mail.gmail.com.

Alessandro Vernet

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Mar 14, 2026, 5:37:15 PM (2 days ago) Mar 14

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Perfect, I'm glad renaming the file fixed it. And thanks for the update, Aurojit.

To view this discussion visit https://groups.google.com/d/msgid/orbeon/CAALrYXZKCrnLmfaCiv%3DMBOEYH3Wbw3yZbwq%2BziUAWgxBSxDveQ%40mail.gmail.com.

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