Jetty 9.4 在启动时启动两个 jvm

Question

建议使用jetty.baseManaging Jetty Base and Jetty Home

Instead of managing multiple Jetty implementations out of several different distribution locations, it is possible to maintain a separation between the binary installation of the standalone Jetty (known as ${jetty.home}), and the customizations for your specific environment(s) (known as ${jetty.base}). There should always only be one Jetty Home (per version of Jetty), but there can be multiple Jetty Base directories that reference it.

我按照下面的结构设置码头

/jetty-9.4.3
 ├──start.jar
 ├── ... 
/mybase
 ├── start.ini
 ├── ... 
 ├── run.bat

mybase下run.bat有如下脚本

SET JETTY_HOME="../jetty-9.4.3"
echo %JETTY_HOME%
java -jar %JETTY_HOME%/start.jar -Xmx768m -Djetty.base=. -DSTOP.PORT=9999 -DSTOP.KEY=rwos &

当我执行 start.bat 时，jetty 会启动 两个 jvms 而如果我直接从 jetty.home 运行 java -jar start.jar 启动一个jvm.

有什么具体原因吗

以下是/mybase/start.ini

的配置

--module=ext
--module=logging-logback
--module=http
jetty.http.port=8088
--module=resources
--module=deploy

此外，它需要比分配的 768M 更多的内存 4.1GB。需要解决这两个问题。

jetty --list-config 输出保留在这里 https://www.dropbox.com/s/sfwwwhkh0gwdxll/config.txt?dl=0

Answer 1

您的 /mybase/start.ini

中可能有 --exec 行

这将派生一个 JVM 以传入您指定的 JVM 选项。

如果您在 --list-config 中看到的配置显示 JVM 参数 的条目，那么这些将通过 exec[=31 强制分叉 JVM =] 技术.

您的 --list-config 显示...

Jetty Environment: ----------------- jetty.version = 9.4.3.v20170317 jetty.tag.version = master jetty.home = /opt/prod-server/nm_jetty/jetty-9.4.3 jetty.base = /opt/prod-server/nm_jetty/roy-comp-jetty/. Config Search Order: -------------------- <command-line> ${jetty.base} -> /opt/prod-server/nm_jetty/roy-comp-jetty/. ${jetty.home} -> /opt/prod-server/nm_jetty/jetty-9.4.3 JVM Arguments: -------------- -Dorg.eclipse.jetty.util.log.class?=org.eclipse.jetty.util.log.Slf4jLog System Properties: ------------------ STOP.KEY = stop-roy-comp STOP.PORT = 15041 conf.dir = . jetty.base = . Properties: ----------- STOP.KEY = stop-roy-comp STOP.PORT = 15041 conf.dir = . java.version = 1.8.0_65 java.version.major = 1 java.version.micro = 0 java.version.minor = 8 java.version.platform = 8 java.version.update = 65 jetty.base = /opt/prod-server/nm_jetty/roy-comp-jetty/. jetty.http.port = 15040 jetty.webapp.addServerClasses = ${jetty.base.uri}/lib/slf4j/,${jetty.base.uri}/lib/logback/ logback.version = 1.1.7 slf4j.version = 1.7.21

如果 we look at the logging-logback module you have enabled 我们会看到...

[exec] -Dorg.eclipse.jetty.util.log.class?=org.eclipse.jetty.util.log.Slf4jLog

Jetty 9.4 在启动时启动两个 jvm

Jetty 9.4 starts two jvms on startup

java

jetty

jetty-9