Dr. Ernst-Udo Wallenborn created CAMEL-23449:
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Summary: Camel Spring Xml >= 4.19.0 no longer works with Spring 6
Key: CAMEL-23449
URL: https://issues.apache.org/jira/browse/CAMEL-23449
Project: Camel
Issue Type: Bug
Components: camel-spring-xml
Affects Versions: 4.20.0, 4.19.0
Reporter: Dr. Ernst-Udo Wallenborn
With Spring version 6.2.18 and Camel 4.19.0 or newer, our application throws
this at startup:
{noformat}
2026-05-07 13:05:43,110 ERROR
[(:)][org.springframework.web.context.ContextLoader] Context initialization
failed
java.lang.NoSuchMethodError: 'org.springframework.context.ApplicationContext
org.springframework.context.event.ContextRefreshedEvent.getSource()'
at
org.apache.camel.spring.xml.CamelContextFactoryBean.onApplicationEvent(CamelContextFactoryBean.java:480)
at
org.apache.camel.spring.xml.CamelContextFactoryBean.onApplicationEvent(CamelContextFactoryBean.java:99)
{noformat}
The code in CamelContextFactoryBean is:
{code:java}
if (event.getSource() instanceof ApplicationContext) {
ApplicationContext appCtx = (ApplicationContext) event.getSource();
{code}
and hasn't changed significantly since 4.18.2. But running
camel-spring-xml-4.19.0.jar through the decompiler the code changes to:
{code:java}
if (event.getSource() instanceof ApplicationContext) {
ApplicationContext appCtx = event.getSource();
{code}
where the typecast is removed. Apparently, Spring 7 implements getSource() in
ApplicationContextEvent:
{code:java}
/**
* Get the {@link ApplicationContext} that the event was raised for.
* @return the {@code ApplicationContext} that the event was raised for
* @since 7.0
* @see #getApplicationContext()
*/
@Override
public ApplicationContext getSource() {
return getApplicationContext();
}
{code}
and this covariant override causes the compiler to remove the cast.
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