英文:
Can not find tools.jar under java home when using arthas in openjdk
问题
以下是翻译的内容：
我在Kubernetes的Docker容器中使用arthas 3.3.6与openjdk8，当我启动arthas时，显示如下：
/opt/arthas # java -jar arthas-boot.jar 1
[INFO] arthas-boot版本：3.3.6
[INFO] arthas主目录：/opt/arthas
[INFO] 尝试附加到进程1
Exception in thread "main" java.lang.IllegalArgumentException：无法在Java主目录下找到tools.jar：/usr/lib/jvm/java-1.8-openjdk/jre，请尝试使用完整路径启动arthas-boot。例如：/opt/jdk/bin/java -jar arthas-boot.jar
at com.taobao.arthas.boot.ProcessUtils.findJavaHome(ProcessUtils.java:222)
at com.taobao.arthas.boot.ProcessUtils.startArthasCore(ProcessUtils.java:233)
at com.taobao.arthas.boot.Bootstrap.main(Bootstrap.java:515)
然后我下载了Oracle JDK并出现了以下错误：
/opt/arthas # /opt/jdk1.8.0_211/bin/java -jar arthas-boot.jar
sh: /opt/jdk1.8.0_211/bin/java: 未找到命令
我在互联网上搜索并得知OracleJDK的C库与Alpine不兼容。有人将tools.jar复制到Docker容器中，但仍未解决此问题。那么我应该如何使arthas正常工作呢？
英文:
I am using arthas 3.3.6 in kubernetes docker container with openjdk8, when I start arthas, it shows:
/opt/arthas # java -jar arthas-boot.jar 1
[INFO] arthas-boot version: 3.3.6
[INFO] arthas home: /opt/arthas
[INFO] Try to attach process 1
Exception in thread "main" java.lang.IllegalArgumentException: Can not find tools.jar under java home: /usr/lib/jvm/java-1.8-openjdk/jre, please try to start arthas-boot with full path java. Such as /opt/jdk/bin/java -jar arthas-boot.jar
at com.taobao.arthas.boot.ProcessUtils.findJavaHome(ProcessUtils.java:222)
at com.taobao.arthas.boot.ProcessUtils.startArthasCore(ProcessUtils.java:233)
at com.taobao.arthas.boot.Bootstrap.main(Bootstrap.java:515)
then I download the oracle JDK and throw this error:
/opt/arthas # /opt/jdk1.8.0_211/bin/java -jar arthas-boot.jar
sh: /opt/jdk1.8.0_211/bin/java: not found
I am searching from internet and tell me the OracleJDK C lib is imcompatible with alpine.someone copy the tools.jar into docker container still not fix this problem. so what should I do to make arthas works?
答案1
得分: 1
我思考过这个问题，除了切换docker文件的基础镜像之外，可能还有两个解决方案：
-
目标进程的JVM是openjdk的JRE，而不是JDK。没有tools.jar。您可以在启动Arthas时手动指定tools.jar的路径
java -jar arthas-boot.jar -Dtools.jar=./tools.jar -
重新安装JDK，并将JAVA_HOME设置为带有tools JDK目录的新目录。
-
将基础镜像更改为openjdk:8，就像您的解决方案一样。
英文:
I thought about this question，Maybe there are two solutions besides switching the base image of docker file：
-
The JVM of the target process is the JRE of openjdk, not JDK. There is no tools.jar. You can manually specify the path of tools.jar when starting Arthas
java -jar arthas-boot.jar -Dtools.jar=./tools.jar -
Reinstall JDK and set JAVA_HOME is new with tools JDK directory of jar.
-
Change the base image to openjdk:8. just like your solution.
答案2
得分: 0
更改基础镜像为 openjdk:8。
FROM openjdk:8
运行正常。
英文:
change the base image to openjdk:8.
FROM openjdk:8
works.
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