debian 上的 icecast2 在大约 1000 个连接后挂起

我在 Debian（或 Ubunto，都测试过）上使用 icecast2（来自 apt-get）。8GB RAM，4 个 CPU 内核，3 个流。

服务器在 XML 配置中配置为 20K 连接限制，但是当它接收到 ~ 1000 个连接时，它会挂起。

我正在使用真实客户进行测试，但也使用curl --silent --output /dev/null http://localhost:8001/livemusicfrom进行测试localhost。

我还尝试在端口 8001 上手动运行另一个，这样我就可以再运行 1000 个连接，但它又挂了。

我需要做什么 ？

 <limits>
    <clients>20000</clients>
    <sources>9</sources>
    <queue-size>10485760</queue-size>
    <client-timeout>30</client-timeout>
    <header-timeout>15</header-timeout>
<threadpool>30</threadpool>
    <source-timeout>10</source-timeout>
    <!-- If enabled, this will provide a burst of data when a client 
         first connects, thereby significantly reducing the startup 
         time for listeners that do substantial buffering. However,
         it also significantly increases latency between the source
         client and listening client.  For low-latency setups, you
         might want to disable this. -->
    <burst-on-connect>1</burst-on-connect>
    <!-- same as burst-on-connect, but this allows for being more
         specific on how much to burst. Most people won't need to
         change from the default 64k. Applies to all mountpoints  -->
    <burst-size>131072</burst-size>
</limits>