詹金斯堆空间

Question

我在 Windows 2016 服务器上运行 Jenkins，在 jenkins.xml 中有以下定义：

-Xrs -Xmx2G -Dhudson.lifecycle=hudson.lifecycle.WindowsServiceLifecycle -jar "%BASE%\jenkins.war" --httpPort=8080 --webroot="%BASE%\war"

但是我们得到一个错误的问题：

exception while collecting data: java.lang.OutOfMemoryError: Java heap space java.lang.OutOfMemoryError: Java heap space  

服务器卡住了。
监控master后，我们看到java堆是512而不是2G。怎么会这样？ 从主监视器屏幕：

OS: OS Windows NT (unknown), , x86/32 (4 cores)
Java:   Java(TM) SE Runtime Environment, 1.8.0_66-b18
JVM:    Java HotSpot(TM) Client VM, 25.66-b18, mixed mode   The server mode has much better performance than the client mode, you should consider using the server mode if your are not in development
PID of process: 7960
Server: Server jetty/9.2.z-SNAPSHOT
Webapp context: 
Start:  11/28/17 2:15 PM
JVM arguments:  -Xrs
-Xmx2G
-Dhudson.lifecycle=hudson.lifecycle.WindowsServiceLifecycle
-Xmx512M
Mean age of http sessions (min):    6
Memory: Non heap memory = 83 Mb (Perm Gen, Code Cache),
Buffered memory = 0 Mb,
Loaded classes = 22,254,
Garbage collection time = 6,007 ms,
Process cpu time = 156,718 ms,
Committed virtual memory = 438 Mb,
Free physical memory = 13,245 Mb,
Total physical memory = 16,383 Mb,
Free swap space = 16,199 Mb,
Total swap space = 19,327 Mb

Answer 1

请注意，您在监视器屏幕上有两个选项-Xmx。

除了验证 jenkins.xml 文件中的内容之外，还可以查看环境变量，例如：

JAVA_OPTS、MAVEN_OPTS 或 ANT_OPTS。