Question

我想在standalone.xml中的wildfly-8.2.0中动态配置以下部分：

<worker name="default" io-threads="100" task-max-threads="100"/>

基本上我不希望这些值被硬编码并在服务器启动时计算它们并将它们作为jboss引导参数传递。我做了这样的事情：

 <worker name="default" io-threads="${my.io.threads:100}" task-max-threads="${my.task.max.threads:1000}"/>

我在启动wildfly服务器时将这些参数传递为 -Dmy.io.threads 和 -Dmy.task.max.threads 。但它没有解析standalone.xml，但有以下异常：

ERROR [org.jboss.as.server] (Controller Boot Thread) JBAS015956: Caught exception during boot: org.jboss.as.controller.persistence.ConfigurationPersistenceException: JBAS014676: Failed to parse configuration
    at org.jboss.as.controller.persistence.XmlConfigurationPersister.load(XmlConfigurationPersister.java:112) [wildfly-controller-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.server.ServerService.boot(ServerService.java:331) [wildfly-server-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.controller.AbstractControllerService$1.run(AbstractControllerService.java:259) [wildfly-controller-8.2.0.Final.jar:8.2.0.Final]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_45]
Caused by: java.lang.NumberFormatException: For input string: "${my.io.threads:100}"
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) [rt.jar:1.8.0_45]
    at java.lang.Integer.parseInt(Integer.java:569) [rt.jar:1.8.0_45]
    at java.lang.Integer.parseInt(Integer.java:615) [rt.jar:1.8.0_45]
    at org.jboss.dmr.StringModelValue.asInt(StringModelValue.java:139) [jboss-dmr-1.2.0.Final.jar:1.2.0.Final]
    at org.jboss.dmr.ModelNode.asInt(ModelNode.java:240) [jboss-dmr-1.2.0.Final.jar:1.2.0.Final]
    at org.jboss.as.controller.AttributeParser.parse(AttributeParser.java:116) [wildfly-controller-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.controller.AttributeParser.parse(AttributeParser.java:82) [wildfly-controller-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.controller.AttributeParser$DiscardOldDefaultValueParser.parse(AttributeParser.java:177) [wildfly-controller-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.controller.AttributeParser.parseAndSetParameter(AttributeParser.java:61) [wildfly-controller-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.controller.PersistentResourceXMLDescription.parse(PersistentResourceXMLDescription.java:83) [wildfly-controller-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.controller.PersistentResourceXMLDescription.parseChildren(PersistentResourceXMLDescription.java:135) [wildfly-controller-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.controller.PersistentResourceXMLDescription.parse(PersistentResourceXMLDescription.java:107) [wildfly-controller-8.2.0.Final.jar:8.2.0.Final]
    at org.wildfly.extension.io.IOSubsystemParser_1_0.readElement(IOSubsystemParser_1_0.java:71)
    at org.wildfly.extension.io.IOSubsystemParser_1_0.readElement(IOSubsystemParser_1_0.java:41)
    at org.jboss.staxmapper.XMLMapperImpl.processNested(XMLMapperImpl.java:110) [staxmapper-1.1.0.Final.jar:1.1.0.Final]
    at org.jboss.staxmapper.XMLExtendedStreamReaderImpl.handleAny(XMLExtendedStreamReaderImpl.java:69) [staxmapper-1.1.0.Final.jar:1.1.0.Final]
    at org.jboss.as.server.parsing.StandaloneXml.parseServerProfile(StandaloneXml.java:1131) [wildfly-server-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.server.parsing.StandaloneXml.readServerElement_1_4(StandaloneXml.java:458) [wildfly-server-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.server.parsing.StandaloneXml.readElement(StandaloneXml.java:145) [wildfly-server-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.as.server.parsing.StandaloneXml.readElement(StandaloneXml.java:107) [wildfly-server-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.staxmapper.XMLMapperImpl.processNested(XMLMapperImpl.java:110) [staxmapper-1.1.0.Final.jar:1.1.0.Final]
    at org.jboss.staxmapper.XMLMapperImpl.parseDocument(XMLMapperImpl.java:69) [staxmapper-1.1.0.Final.jar:1.1.0.Final]
    at org.jboss.as.controller.persistence.XmlConfigurationPersister.load(XmlConfigurationPersister.java:104) [wildfly-controller-8.2.0.Final.jar:8.2.0.Final]
    ... 3 more

我已经读过IO子系统不支持表达式。有没有其他方法来实现这一目标？是否有任何内部参数在启动时传递时会覆盖这些值？

Answer 1

Wildfly-8.2.0不支持IO子系统工作区中io-threads和task-max-threads属性的表达式。我在WFCORE项目下提出了Jira ticket，以便Jboss团队解决这个问题。

Answer 2

由于它不支持表达式，因此无法动态配置它。但是在WildFly 10.0.0.Final中，如果留空则动态生成。

指定要为worker创建的I / O线程数。如果未指定，将选择默认值，该值由cpuCount * 2
计算

Wildfly：如何动态配置IO子系统中的工作线程

2 个答案: