问题描述
我需要从Elastic Beanstalk服务器获取JVM堆转储，但是该服务器没有jcmd或jmap. Amazon本身并未将其与JDK一起安装.这是安装的东西:
I'm need to get a JVM heap dump from an Elastic Beanstalk server, but the server doesn't have jcmd or jmap. Amazon doesn't natively install them with the JDK. Here's what's installed:
[ec2-user@ip-x-x-x-x ~]$ sudo yum list installed|grep jdk
java-1.7.0-openjdk.x86_64 1:1.7.0.111-2.6.7.2.68.amzn1 @amzn-updates
java-1.8.0-openjdk.x86_64 1:1.8.0.101-3.b13.24.amzn1 @amzn-updates
java-1.8.0-openjdk-headless.x86_64 1:1.8.0.101-3.b13.24.amzn1 @amzn-updates
从Elastic Beanstalk上的JVM获取堆转储的最佳方法是什么?
What's the best way to get a heap dump from the JVM on Elastic Beanstalk?
推荐答案
我发现您可以通过安装正确的软件包来安装jmap:
I have found you can install jmap by installing the correct package:
sudo yum install java-1.8.0-openjdk-devel
这至少应允许生成堆转储.
This should at least allow a heap dump to be generated.
此外，要确保jmap中的所有功能都运行，还请安装:
In addition, to make sure all functions in jmap run, also install:
sudo yum --enablerepo='*-debug*' install java-1.8.0-openjdk-debuginfo
尽管这可能取决于您使用的基准，tomcat版本等.
Although this might depend on the baseline, tomcat version etc you use.
创建堆转储时，请使用tomcat用户:
When creating a heap dump, use the tomcat user:
sudo -u tomcat jmap -dump:live,file=/tmp/test.hprof <pid>
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