blocks|key|1899246|text|VM选项和环境变量可以从应用程序配置中引用，这通常是设置长名称属性的一种更方便的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1899247|例如，可以在application.yml中定义以下引用|offset|length|style|CODE|1899248|hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds:+${service.timeout}|code-block|syntax|javascript|1899249|这将从VM选项-Dservice.timeout=10000中解析，将默认的Hystrix命令超时设置为10秒。对于环境变量，它甚至更简单--多亏了松弛结合，其中任何一个都能工作(export示例适用于Linux)：|1899250|export+service.timeout=10000|unordered-list-item|1899251|export+service_timeout=10000|1899252|export+SERVICE.TIMEOUT=10000|1899253|export+SERVICE_TIMEOUT=10000|1899254|常用的方法是对VM参数使用lowercase.dot.separated，对环境变量使用ALL_CAPS_WITH_UNDERSCORES。|1899255|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html#boot-features-external-config-relaxed-binding^0|0|6|F|0|0|7|N|2I|6|22|4|0|0|0|S|0|0|S|0|0|S|0|0|S|0|D|N|18|P|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|18|8|@$D|19|E|1A|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|1B|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1C|8|@$D|1D|E|1E|F|G]|$D|1F|E|1G|F|G]]|9|@$D|1H|E|1I|1|1J]]|A|$]]|$1|O|3|P|5|Q|7|1K|8|@$D|1L|E|1M|F|G]]|9|@]|A|$]]|$1|R|3|S|5|Q|7|1N|8|@$D|1O|E|1P|F|G]]|9|@]|A|$]]|$1|T|3|U|5|Q|7|1Q|8|@$D|1R|E|1S|F|G]]|9|@]|A|$]]|$1|V|3|W|5|Q|7|1T|8|@$D|1U|E|1V|F|G]]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1W|8|@$D|1X|E|1Y|F|G]|$D|1Z|E|20|F|G]]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|21|8|@]|9|@]|A|$]]]|10|$11|$5|12|13|14|A|$15|16]]]]

VM options and environment variables can be referenced from application configuration, which is often a more convenient way to set properties with longer names. 

For example, one can define the following reference in <code>application.yml</code>:

<pre><code>hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds: ${service.timeout}
</code></pre>

which will be resolved from the VM option <code>-Dservice.timeout=10000</code>, setting the default Hystrix command timeout to 10 seconds. It is even simpler with environment variables - thanks to <a href="https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html#boot-features-external-config-relaxed-binding" rel="noreferrer">relaxed binding</a>, any of these will work (<code>export</code> examples are for Linux):

<ul>
<li><code>export service.timeout=10000</code></li>
<li><code>export service_timeout=10000</code></li>
<li><code>export SERVICE.TIMEOUT=10000</code></li>
<li><code>export SERVICE_TIMEOUT=10000</code></li>
</ul>

The common approach is to use <code>lowercase.dot.separated</code> for VM arguments and <code>ALL_CAPS_WITH_UNDERSCORES</code> for environment variables.

blocks|key|1899283|text|您可以尝试使用默认值的表达式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1899284|hystrix.command.default.execution.isolation.thread.timeoutIn‌Milliseconds:+${SERVICE_TIMEOUT:2000}|code-block|syntax|javascript|1899285|如果您有SERVICE_TIMEOUT系统变量--它将被应用程序使用，否则，将获取一个默认值。|offset|length|style|CODE|1899286|entityMap^0|0|0|4|F|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You could try expression with a default value:

<pre><code>hystrix.command.default.execution.isolation.thread.timeoutIn‌Milliseconds: ${SERVICE_TIMEOUT:2000}
</code></pre>

In case you have <code>SERVICE_TIMEOUT</code>system variable - it will be used by an application, otherwise, a default value will be picked up.

blocks|key|1899180|text|使用JSON环境变量可以找到比解决方案更多的解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1899181|SPRING_APPLICATION_JSON='{+"hystrix"+:+{+"command"+:+{+"default"+:+{+"execution"+:+{+"isolation"+:+{+"thread"+:+{+"timeoutInMilliseconds"+:+3000+}+}+}+}+}+}+}'|style|CODE|1899182|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-external-config^0|2|4|0|0|0|4F|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@$A|U|B|V|F|G]]|9|@]|C|$]]|$1|H|3|-4|5|6|7|W|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

Found more of a workaround than a solution, using <a href="http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-external-config" rel="nofollow noreferrer">SPRING_APPLICATION_JSON</a> environment variable :

<code>SPRING_APPLICATION_JSON='{ "hystrix" : { "command" : { "default" : { "execution" : { "isolation" : { "thread" : { "timeoutInMilliseconds" : 3000 } } } } } } }'</code>

blocks|key|1899205|text|您可以使用Spring文件，请进一步阅读下面的链接|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1899206|https://github.com/spring-cloud/spring-cloud-netflix/issues/321|offset|length|1899207|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1R|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

You can use Spring config yaml file , Please read further on following link 

<a href="https://github.com/spring-cloud/spring-cloud-netflix/issues/321" rel="nofollow noreferrer">https://github.com/spring-cloud/spring-cloud-netflix/issues/321</a>

blocks|key|1899342|text|VM选项-Dhystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=2000适用于我。但是它有一个副作用，那么您就不能更改java代码中的配置值，因为系统属性是优先的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1899343|ConfigurationManager.getConfigInstance().setProperty(
"hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds",+3000);//+it+doesn't+work|code-block|syntax|javascript|1899344|entityMap^0|4|27|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

VM option <code>-Dhystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=2000</code> works for me. However it has a side effect, then you can not change the config value in java code since system properties are prioritized. 

<pre><code>ConfigurationManager.getConfigInstance().setProperty(
"hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds", 3000);// it doesn't work
</code></pre>

In order to change Hystrix's default request timeout (1000ms), one must set the following property :
 <code>hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=2000</code>

What is the corresponding environment variable ?

I would like to "tune" the timeout on my favorite cloud platform without touching the source code first.
I'm pretty sure this one doesn't work : <code>HYSTRIX_COMMAND_DEFAULT_EXECUTION_ISOLATION_THREAD_TIMEOUT_IN_MILLISECONDS=2000</code>

<hr>

EDIT : Problem was found with Spring Cloud Camden / Spring Boot 1.4.

Setting Hystrix timeout with environment variable

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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为了更改Hystrix的默认请求超时(1000‘s)，必须设置以下属性：hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=2000对应的环境变量是什么？我想在我最喜欢的云平台上“调优”超时，而不首先触及源代码。我很确定这个不管用：HYSTRIX_COMMAND_DEFAULT_EXECUTION_ISO

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