scalaXB Async Dispatcher java.lang.IllegalStateException：未能创建子事件循环答案

【问题标题】：scalaXB Async Dispatcher java.lang.IllegalStateException: failed to create a child event loopscalaXB Async Dispatcher java.lang.IllegalStateException：未能创建子事件循环
【发布时间】：2017-08-20 17:39:00
【问题描述】：

我正在使用 ScalaXB 调用 SOAP Web 服务。我使用以下命令生成了针对 WSDL 的代码

我正在循环调用网络服务。我注意到代码在一段时间内运行良好，但随后开始抛出以下错误

java.lang.IllegalStateException: failed to create a child event loop
        at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:68)
        at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:50)
        at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:70)
        at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:65)
        at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:56)
        at org.asynchttpclient.netty.channel.ChannelManager.<init>(ChannelManager.java:173)
        at org.asynchttpclient.DefaultAsyncHttpClient.<init>(DefaultAsyncHttpClient.java:85)
        at dispatch.Http.client$lzycompute(execution.scala:16)
        at dispatch.Http.client(execution.scala:16)
        at dispatch.Http.client(execution.scala:11)
        at dispatch.HttpExecutor$class.apply(execution.scala:120)
        at dispatch.Http.apply(execution.scala:11)
        at dispatch.HttpExecutor$class.apply(execution.scala:115)
        at dispatch.Http.apply(execution.scala:11)
        at scalaxb.DispatchHttpClientsAsync$DispatchHttpClient$class.request(httpclients_dispatch_async.scala:22)
        at scalaxb.DispatchHttpClientsAsync$$anon$1.request(httpclients_dispatch_async.scala:7)
        at scalaxb.SoapClientsAsync$SoapClientAsync$class.soapRequest(soap12_async.scala:43)
        at scalaxb.SoapClientsAsync$$anon$1.soapRequest(soap12_async.scala:24)
        at scalaxb.SoapClientsAsync$SoapClientAsync$class.requestResponse(soap12_async.scala:63)
        at scalaxb.SoapClientsAsync$$anon$1.requestResponse(soap12_async.scala:24)
Caused by: io.netty.channel.ChannelException: failed to open a new selector
    at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:176)
    at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:150)
    at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:103)
    at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:64)
    ... 34 more
Caused by: java.io.IOException: Too many open files in system
        at sun.nio.ch.KQueueArrayWrapper.init(Native Method)
        at sun.nio.ch.KQueueArrayWrapper.<init>(KQueueArrayWrapper.java:98)
        at sun.nio.ch.KQueueSelectorImpl.<init>(KQueueSelectorImpl.java:88)
        at sun.nio.ch.KQueueSelectorProvider.openSelector(KQueueSelectorProvider.java:42)
        at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:174)
        ... 37 more

【问题讨论】：

标签： scala scalaxb

【解决方案1】：

我找到了这个问题的答案。问题是我在循环内的代理对象上做了一个新的。

似乎这些对象创建了一个新连接并且没有被清理导致上述错误。

我将代理对象移出循环，并在循环内调用 web 服务，问题得到解决。

【讨论】：