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在打开浏览器窗口之前运行bin/unet sim或bin/unet audio大约需要 5 秒钟。机器：MBP、macOS Mojave (10.14.6)

打开 TCP 侦听端口似乎需要一些时间。下面的日志：

1569411423819|INFO|org.arl.unet.UnetBoot@1:invoke|fjage Build: fjage-1.6.1/10-09-2019_00:41:43
1569411423833|INFO|org.arl.unet.UnetBoot@1:invoke|UnetBoot: [samples/2-node-network.groovy]
1569411423936|INFO|org.arl.unet.JsonTypeAdapter@1:<clinit>|Groovy detected, using GroovyClassLoader
1569411423956|INFO|org.arl.fjage.remote.MessageAdapterFactory@1:<clinit>|Groovy detected, using GroovyClassLoader
1569411424383|INFO|org.arl.unet.sim.SimulationMasterContainer@1:openTcpServer|Listening on port 1101
1569411424472|INFO|Script1@1:invoke|Starting web interface on port null:8081
1569411424554|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /fjage
1569411424555|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /
1569411424559|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /logs
1569411424559|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /sim
1569411434392|INFO|org.arl.fjage.connectors.TcpServer@12:run|Listening on port 1101
>> [Comment] Here it hangs
1569411439397|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /ws
1569411439440|INFO|org.arl.fjage.connectors.WebServer@1:start|Started web server on port 8081
1569411439443|INFO|org.arl.unet.sim.SimulationMasterContainer@1:addConnector|Listening on ws://172.23.155.178:8081/ws
1569411449455|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /fjage/shell/ws
1569411449728|INFO|Script1@1:invoke|Created static node A (arp) @ [0, 0, -15]
1569411449729|INFO|org.arl.unet.sim.SimulationMasterContainer@1:openTcpServer|Listening on port 1102
1569411449730|INFO|Script1@1:invoke|Starting web interface on port null:8082
1569411449731|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /fjage
1569411449732|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /
1569411449732|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /logs
1569411449732|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /sim
1569411459738|INFO|org.arl.fjage.connectors.TcpServer@26:run|Listening on port 1102
>> [Comment] Here it hangs
1569411464739|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /ws
1569411464742|INFO|org.arl.fjage.connectors.WebServer@1:start|Started web server on port 8082
1569411464742|INFO|org.arl.unet.sim.SimulationMasterContainer@1:addConnector|Listening on ws://172.23.155.178:8082/ws
1569411474754|INFO|org.arl.fjage.connectors.WebServer@1:add|Adding web context: /fjage/shell/ws
1569411474802|INFO|Script1@1:invoke|Created static node B (arp) @ [1000, 0, -15]
1569411474815|INFO|Script1@1:invoke| --- BEGIN SIMULATION #1 ---
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1 回答 1

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似乎TCPServer当您启动一个新的模拟节点时正在打开的类（在日志中的这个位置）

1569411449729|INFO|org.arl.unet.sim.SimulationMasterContainer@1:openTcpServer|Listening on port 1102

似乎需要将近五秒钟才能开始。启动后，它会打印此日志

1569411459738|INFO|org.arl.fjage.connectors.TcpServer@26:run|Listening on port 1102

相关代码在这里https://github.com/org-arl/fjage/blob/master/src/main/java/org/arl/fjage/connectors/TcpServer.java#L71

挖掘Java似乎InetAddress.getLocalHost().getHostAddress()需要很长时间。

这似乎是 macOS 上的常见问题。请参阅InetAddress.getLocalHost() 运行缓慢（30 秒以上）

这个工具可以帮助你检查它是否确实是一个问题https://github.com/thoeni/inetTester

似乎 Java127.0.0.1在从getHostName. 根据您的 DNS 设置，这可能需要 5 秒才能超时。

根据上面链接的 Stackoverflow 文章，一个简单的修复方法似乎是为您的/etc/hosts文件添加一个别名127.0.0.1。

这个 bash oneliner 可以为您做到这一点。

n=$(sudo scutil --get LocalHostName); sudo sed -i.bak "/127.0.0.1/s/$/ $n/" /etc/hosts; sudo sed -i.bak "/::1/s/$/ $n/" /etc/hosts
于 2019-10-07T01:52:40.877 回答