Estou criando um plug-in gradle no qual desejo dar aos usuários a capacidade de substituir algumas propriedades de um arquivo externo. Estou usando o propertyPlaceholderConfigurer do Spring para definir alguns destinos em que os usuários podem colocar seus arquivos. Isso funciona conforme o esperado. Meu problema é que, ao executar meu plug-in, o Spring imprime no console: "Não foi possível carregar as propriedades do URL [...]" Alguém tem alguma idéia de como eu reprimiria esta mensagem?

Eu tentei substituir logback e sl4j sem sucesso.

My Spring application-context xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:security="http://www.springframework.org/schema/security"
   xmlns:aop="http://www.springframework.org/schema/aop"
   xmlns:tx="http://www.springframework.org/schema/tx"
   xmlns:util="http://www.springframework.org/schema/util"
   xmlns:context="http://www.springframework.org/schema/context"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-2.0.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.0.xsd"
   default-lazy-init="true">

<!-- Activates scanning of @Autowired -->
<context:annotation-config/>

<!-- Activates scanning of @Repository and @Service -->
<context:component-scan base-package="com.example.test"/>

<bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations">
        <list>
            <value>classpath:/conf/plugin.properties</value>
            <value>file:${user.home}/conf/plugin.properties</value>
            <value>file:${user.home}/conf/plugin-override.properties</value>
        </list>
    </property>
    <property name="placeholderPrefix" value="${"/>
    <property name="ignoreResourceNotFound" value="true"/>
    <property name="systemPropertiesMode" value="2"/>
</bean>