mulesoft中未捕获异常

我正在开发一个应用程序,如果出现任何异常,它会适当地打印异常消息。这是我的自定义过滤器

    package filter;
import java.io.IOException;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.mule.api.MuleMessage;
public class ExceptionClass implements org.mule.api.routing.filter.Filter {

    @Override
    public boolean accept(MuleMessage message) {
        Map<String,Object> payload=(Map<String,Object>)message.getPayload();

        if(!payload.containsKey("productid"))
        {

            throw new java.lang.NullPointerException("no data found in payload "+payload.toString());

        }
        if(Integer.parseInt((String) payload.get("productid"))<5)
        {
        throw new IllegalArgumentException("invalid input to payload " +payload.toString());

        }
        return true;
    }

}

以下是应用程序的配置

    <?xml version="1.0" encoding="UTF-8"?>

<mule xmlns:json="http://www.mulesoft.org/schema/mule/json" xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
    xmlns:spring="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
http://www.mulesoft.org/schema/mule/json http://www.mulesoft.org/schema/mule/json/current/mule-json.xsd">
    <http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="8081" doc:name="HTTP Listener Configuration"/>
    <flow name="muleexceptionhandlingFlow">
        <http:listener config-ref="HTTP_Listener_Configuration" path="/" doc:name="HTTP" >
            <http:response-builder statusCode="#[flowVars['statuscode']]" reasonPhrase="#[flowVars['reason']]"/>
        </http:listener>
        <json:json-to-object-transformer returnClass="java.util.HashMap" doc:name="JSON to Object"/>
        <custom-filter doc:name="Custom" class="filter.ExceptionClass"/>
        <logger message="payload:#[payload]" level="INFO" doc:name="Logger"/>
        <logger message="#[message]" level="INFO" doc:name="Logger"/>
        <set-payload value="payload:#[payload]" doc:name="Set Payload"/>
    </flow>
    <choice-exception-strategy name="muleexceptionhandlingChoice_Exception_Strategy">
        <catch-exception-strategy doc:name="Catch Missing Data Exception Strategy" logException="false" when="#[exception.causedBy(java.lang.NullPointerException)]">
            <set-payload value="Missing data:#[payload]" doc:name="Set Payload"/>
            <set-variable variableName="reason" value="missing input data" doc:name="Variable"/>
            <set-variable variableName="statuscode" value="400" doc:name="Variable"/>
        </catch-exception-strategy>
        <catch-exception-strategy doc:name="Catch Invalid data Exception Strategy" logException="false" when="#[exception.causedBy(java.lang.IllegalArgumentException)}">
            <set-payload value="Invalid Data:#[payload]" doc:name="Set Payload"/>
            <set-variable variableName="reason" value="invalid input" doc:name="Variable"/>
            <set-variable variableName="statuscode" value="400" doc:name="Variable"/>
        </catch-exception-strategy>
    </choice-exception-strategy>
</mule>

错误2017-07-25 17:35:49595 [[muleeexceptionhandling].HTTP\u Listener\u配置.worker.01] ********************************************************************************消息:在有效载荷{price=1000,
:{price=1000,productname=Shappoom}负载类型: java.util。HashMap筛选器: filter.ExceptionClass@584d4f19元素: 多异常处理:null:null --------------------------------------------------------------------------------根异常堆栈跟踪:java.lang.NullPointerException:无数据 在以下位置的有效负载{price=1000,productname=Shappoom}中找到 接受(ExceptionClass.java:23) accept(MessageFilter.java:93)位于 processor.AbstractFilteringMessageProcessor.process(AbstractFilteringMe ..................................