我正在使用Apache Karaf 2.3.1和Apache Camel 2.10.4。不管怎样，我想声明我无法更改任何一种产品的版本。
我在Karaf部署了许多捆绑包，一切正常。但有一段时间我在Karaf启动时遇到以下异常：
13:11:02,728 | ERROR | ExtenderThread-4 | BundleApplicationContextListener 50 | 68 - org.springframework.osgi.extender - 1.2.1 | Application context refresh failed (OsgiBundleXmlApplicationContext(bundle=camel-context.xml, config=osgibundle:/META-INF/spring/*.xml)) org.apache.camel.RuntimeCamelException:
**org.apache.camel.FailedToCreateRouteException: Failed to create route bosService: Route[[From[cxf:bean:MyServiceEndpoint]] -> [Bean[ref:JAXBF... because of Failed to resolve endpoint: cxf://bean:MyServiceEndpoint due to: No component found with scheme: cxf** at org.apache.camel.util.ObjectHelper.wrapRuntimeCamelException(ObjectHelper.java:1316)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.spring.SpringCamelContext.onApplicationEvent(SpringCamelContext.java:120)[222:org.apache.camel.camel-spring:2.10.4] at org.apache.camel.spring.CamelContextFactoryBean.onApplicationEvent(CamelContextFactoryBean.java:280)[222:org.apache.camel.camel-spring:2.10.4] at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:97)[63:org.springframework.context:3.1.4.RELEASE] at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:327)[63:org.springframework.context:3.1.4.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:941)[63:org.springframework.context:3.1.4.RELEASE] at org.springframework.osgi.context.support.AbstractOsgiBundleApplicationContext.finishRefresh(AbstractOsgiBundleApplicationContext.java:235)[67:org.springframework.osgi.core:1.2.1] at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext$4.run(AbstractDelegatedExecutionApplicationContext.java:358)[67:org.springframework.osgi.core:1.2.1] at org.springframework.osgi.util.internal.PrivilegedUtils.executeWithCustomTCCL(PrivilegedUtils.java:85)[67:org.springframework.osgi.core:1.2.1] at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.completeRefresh(AbstractDelegatedExecutionApplicationContext.java:320)[67:org.springframework.osgi.core:1.2.1] at org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor$CompleteRefreshTask.run(DependencyWaiterApplicationContextExecutor.java:132)[68:org.springframework.osgi.extender:1.2.1] at java.lang.Thread.run(Thread.java:724)[:1.7.0_25]
**Caused by: org.apache.camel.FailedToCreateRouteException: Failed to create route bosService: Route[[From[cxf:bean:MyServiceEndpoint]] -> [Bean[ref:JAXBF... because of Failed to resolve endpoint: cxf://bean:MyServiceEndpoint due to: No component found with scheme: cxf** at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:177)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.impl.DefaultCamelContext.startRoute(DefaultCamelContext.java:722)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.impl.DefaultCamelContext.startRouteDefinitions(DefaultCamelContext.java:1789)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:1575)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:1444)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.spring.SpringCamelContext.doStart(SpringCamelContext.java:179)[222:org.apache.camel.camel-spring:2.10.4] at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:60)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:1412)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.spring.SpringCamelContext.maybeStart(SpringCamelContext.java:228)[222:org.apache.camel.camel-spring:2.10.4] at org.apache.camel.spring.SpringCamelContext.onApplicationEvent(SpringCamelContext.java:118)[222:org.apache.camel.camel-spring:2.10.4] ... 10 more
**Caused by: org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: cxf://bean:MyServiceEndpoint due to: No component found with scheme: cxf** at org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:485)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.util.CamelContextHelper.getMandatoryEndpoint(CamelContextHelper.java:50)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.model.RouteDefinition.resolveEndpoint(RouteDefinition.java:187)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.impl.DefaultRouteContext.resolveEndpoint(DefaultRouteContext.java:108)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.impl.DefaultRouteContext.resolveEndpoint(DefaultRouteContext.java:114)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.model.FromDefinition.resolveEndpoint(FromDefinition.java:72)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.impl.DefaultRouteContext.getEndpoint(DefaultRouteContext.java:90)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:857)[176:org.apache.camel.camel-core:2.10.4] at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:172)[176:org.apache.camel.camel-core:2.10.4]
这是我的 camel-context.xml ：
<beans:beans
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:camel-cxf="http://camel.apache.org/schema/cxf"
xmlns:httpj="http://cxf.apache.org/transports/http-jetty/configuration"
xmlns:jaxrs="http://cxf.apache.org/jaxrs"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:osgi="http://www.springframework.org/schema/osgi"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://camel.apache.org/schema/cxf
http://camel.apache.org/schema/cxf/camel-cxf-2.15.2-spring.xsd
http://cxf.apache.org/transports/http-jetty/configuration
http://cxf.apache.org/schemas/configuration/http-jetty.xsd
http://cxf.apache.org/jaxrs
http://cxf.apache.org/schemas/jaxrs.xsd
http://www.springframework.org/schema/osgi
http://www.springframework.org/schema/osgi/spring-osgi.xsd
http://camel.apache.org/schema/spring
http://camel.apache.org/schema/spring/camel-spring-2.10.4.xsd">
<osgi:reference id="MyService"
interface="com.foo.blah.camel.MyService"/>
<beans:bean id="cxf" class="org.apache.cxf.bus.spring.SpringBus"/>
<httpj:engine-factory bus="cxf">
<httpj:engine port="8888">
<httpj:sessionSupport>true</httpj:sessionSupport>
</httpj:engine>
</httpj:engine-factory>
<camel-cxf:cxfEndpoint id="MyServiceEndpoint"
serviceClass="com.foo.blah.service.MyWebService"
address="http://0.0.0.0:8888/MyWebService">
<camel-cxf:inInterceptors>
<beans:bean class="com.foo.blah.camel.SomeInInterceptor"/>
</camel-cxf:inInterceptors>
<camel-cxf:outInterceptors>
<beans:bean class="com.foo.blah.camel.SomeOutInterceptor"/>
</camel-cxf:outInterceptors>
</camel-cxf:cxfEndpoint>
<camelContext id="my-camel-ctx"
xmlns="http://camel.apache.org/schema/spring" trace="true">
<route id="MyRoute">
<from uri="cxf:bean:MyServiceEndpoint"/>
<bean id="myService" ref="MyService"/>
</route>
</camelContext>
</beans:bean>
因为这个问题是间歇性的，所以我将成功的日志与包含上述堆栈的日志进行了比较。虽然大多数内容都是相同的，但我确实注意到以下明显的差异：
成功的日志摘录：
11：23：00,072 |信息| ExtenderThread-4 | BundleTypeConverterLoader $ Loader 353 | 175 - org.apache.camel.camel-core - 2.10.4 |找到2个@Converter类来 加载11：23：00,104 |信息| ExtenderThread-4 | BundleTypeConverterLoader $ Loader 353 | 175 - org.apache.camel.camel-core - 2.10.4 |找到2个@Converter类来 加载11：23：00,104 |信息| ExtenderThread-4 | BundleTypeConverterLoader $ Loader 353 | 175 - org.apache.camel.camel-core - 2.10.4 |找到0 @Converter类来 加载11：23：00,119 |信息| ExtenderThread-4 | BundleTypeConverterLoader $ Loader 353 | 175 - org.apache.camel.camel-core - 2.10.4 |找到2个@Converter类来 加载11：23：00,150 |信息| ExtenderThread-4 | BundleTypeConverterLoader $ Loader 353 | 175 - org.apache.camel.camel-core - 2.10.4 |找到1个@Converter类来 加载11：23：00,150 |信息| ExtenderThread-4 | BundleTypeConverterLoader $ Loader 353 | 175 - org.apache.camel.camel-core - 2.10.4 |找到1个@Converter类来 加载11：23：00,166 |信息| ExtenderThread-4 | BundleTypeConverterLoader $ Loader 353 | 175 - org.apache.camel.camel-core - 2.10.4 |找到1个@Converter类来 加载11：23：00,229 |信息| ExtenderThread-4 | e.camel.impl.DefaultCamelContext 1398 | 175 - org.apache.camel.camel-core - 2.10.4 | Apache Camel 2.10.4 （CamelContext：my-camel-ctx）正在开始
日志摘录失败：
13：11：02,587 |信息| ExtenderThread-4 | e.camel.impl.DefaultCamelContext 1398 | 176 - org.apache.camel.camel-core - 2.10.4 | Apache Camel 2.10.4 （CamelContext：my-camel-ctx）开始于13：11：02,587 |信息| ExtenderThread-4 | e.camel.impl.DefaultCamelContext 1464 | 176 - org.apache.camel.camel-core - 2.10.4 |已启用跟踪 CamelContext：my-camel-ctx 13：11：02,712 |信息| ExtenderThread-4 | e.camel.impl.DefaultCamelContext 1590 | 176 - org.apache.camel.camel-core - 2.10.4 | Apache Camel 2.10.4 （CamelContext：my-camel-ctx）正在关闭 13：11：02,712 |信息| ExtenderThread-4 | verter.BaseTypeConverterRegistry 522 | 176 - org.apache.camel.camel-core - 2.10.4 | TypeConverterRegistry 利用率[企图= 5，命中数= 4，未命中= 1 ，失败= 0] 映射[总计= 172，未命中= 1 ] 13：11：02,728 |信息| ExtenderThread-4 | e.camel.impl.DefaultCamelContext 1656 | 176 - org.apache.camel.camel-core - 2.10.4 | Apache Camel 2.10.4 （CamelContext：my-camel-ctx）在0.000秒内关闭。正常运行时间 0.141秒。
正如你所看到的，Camel在启动后几乎立即关闭，我猜这是导致手头异常的原因。此外，它没有列出成功日志中表示的@Converter类，而是表示有一个未命中。我不确定这与关机有什么关系，但这是我在http://camel.apache.org/type-converter.html找到的：
返回空值默认情况下，在POJO中使用方法时 @Converter返回null的注释不是有效的响应。如果 返回null，然后Camel将该类型转换器视为a 想念，并防止将来使用它。如果为null应该是 允许作为有效的响应，然后从Camel 2.11.2 / 2.12开始 可以在注释中指定它，如下所示：
@Converter(allowNull = true)
public static InputStream toInputStream(File file) throws
IOException {
if (file.exist()) {
return new BufferedInputStream(new FileInputStream(file));
} else {
return null;
}
}
我的代码中没有任何@Coverter实例，因此必须抱怨我的应用程序引用的库中的实例。我到处寻找解决方案，但没有成功。所以任何帮助将不胜感激。谢谢。