logstash解析xml文件问题

Question

用logstash解析xml文件，文件内容如下：

<a>
    <a1>aaaaa</a1>
    <a2>bbbbb</a2>
    <a3>
        <a31>ccccc1</a31>
        <a32>ccccc2</a32>
    </a3>
    <a4>
        <a41>ddddd1</a41>
        <a42>ddddd2</a42>
    </a4>
    <a5>
        <a51>eeeee1</a51>
        <a52>eeeee2</a52>
    </a5>
</a>

解析成：

{a1=aaaaa,a2=bbbbb,a31=ccccc1,a32=ccccc2}
{a1=aaaaa,a2=bbbbb,a41=ddddd1,a42=ddddd2}
{a1=aaaaa,a2=bbbbb,a51=ddddd1,a52=ddddd2}

Answer 1

打错了？
{a1=aaaaa,a2=bbbbb,a31=ccccc1,a32=ccccc2}
{a1=aaaaa,a2=bbbbb,a41=ddddd1,a42=ddddd2}
{a1=aaaaa,a2=bbbbb,a51=eeeee1,a52=eeeee2}