Mule 异常策略不会停止流程处理

Mule exception strategy does not stop flow from processing

我有以下场景。如果由于某种原因 FTP 上传失败(在这种情况下我输入了错误的凭据),捕获异常策略会被正确调用,但我仍然会在我的日志文件中看到消息 Upload complete.

为什么流程出现异常后继续执行?

<flow name="mainFlow" doc:name="mainFlow">
    <vm:inbound-endpoint path="test" exchange-pattern="one-way" />

    <choice>
        <when expression="#[flowVars.fileToUpload != null]">
            <set-payload value="#[flowVars.fileToUpload]" /> 
            <ftp:outbound-endpoint host="${ftp.host}" port="${ftp.port}" user="${ftp.username}" password="${ftp.password}" path="${ftp.path.input}"  outputPattern="#[flowVars.fileName]" /> 
        </when>
        <otherwise>
            <logger doc:name="Logger"/>
        </otherwise>
    </choice>

    <logger message="Upload complete." level="INFO" />

    <catch-exception-strategy>
        <logger doc:name="Exception occurred"/>
    </catch-exception-strategy>
</flow>

因为传入的MuleEvent是异步的。尝试在流程上设置 processiingStrategy="synchronous":

<flow name="mainFlow" doc:name="mainFlow" processingStrategy="synchronous">
    ....
</flow>