Orbeon Forms 2025.1-pe连接MySQL时$attachment-mediatypes空序列错误求助

问题 #

使用镜像 orbeon/orbeon-forms:2025.1-pe，搭配MySQL数据库，已完成以下配置：

• 配置了 orbeon.xml、properties-prod.xml
• Dockerfile安装了MySQL驱动
• MySQL的Schema、表已创建，容器可正常连接数据库

启动Orbeon容器后访问/orbeon/fr/时出现如下错误：

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|

解决方法 #

错误核心是$attachment-mediatypes变量为空，该变量对应Orbeon配置中的oxf.fr.attachment.mediatypes属性，需在配置文件中明确设置有效值：

• 打开properties-prod.xml（或当前使用的生产环境配置文件）
• 添加或修改以下配置项，设置允许的附件媒体类型，示例如下：

<property
    as="xs:string"
    name="oxf.fr.attachment.mediatypes"
    value="image/jpeg, image/png, application/pdf, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.openxmlformats-officedocument.wordprocessingml.document"/>

• 保存配置后重启Orbeon容器

若需针对特定应用或表单做精细配置，可使用带应用/表单前缀的属性，例如：

<property
    as="xs:string"
    name="oxf.fr.attachment.mediatypes.acme.expense"
    value="image/jpeg, application/pdf"/>

内容的提问来源于stack exchange，提问作者A Basak