在WebSphere中生成堆转储、Java核心转储和系统转储。

作者姚伟斌

一个 system administrator 的基本任务是在 WebSphere 应用程序服务器中生成系统dump、java核心和堆dump。

通常，当需要对应用程序或基础架构进行故障排除并需要调查问题时，您必须执行以下操作。

您可以使用 WAS管理员控制台 或 命令行 来实现。根据您的偏好，您可以选择方法。

1. 使用WebSphere管理控制台

  • 登录DMGR控制台
  • 在左侧导航到故障排除
  • 点击java dumps和cores

  • 从列表中选择JVM，然后点击您希望生成的JVM

dump和core将在WebSphere配置文件位置生成。您将在消息下方获得绝对路径。

2. 使用命令行

  • 登录WAS服务器
  • 进入配置文件和bin文件夹
  • 执行wsadmin.sh文件
[root@localhost bin]# ./wsadmin.sh
WASX7209I: 使用SOAP连接器连接到节点localhostCellManager01上的进程"dmgr"；进程类型为：DeploymentManager
WASX7029I: 如需帮助，请输入："$Help help"
wsadmin>
  • 将JVM名称设置为变量
set jvm [$AdminControl completeObjectName type=JVM,process=server1,*]

注意：server1是示例。将其更改为您实际的JVM名称。

wsadmin>set jvm [$AdminControl completeObjectName type=JVM,process=server1,*]
WebSphere:name=JVM,process=server1,platform=proxy,node=localhostNode01,j2eeType=JVM,J2EEServer=server1,version=8.5.5.0,type=JVM,mbeanIdentifier=JVM,cell=localhostCell01,spec=1.0
wsadmin>

生成堆dump

  • 执行以下命令
$AdminControl invoke $jvm generateHeapDump

这将生成堆dump，并提供其可用路径。

wsadmin>$AdminControl invoke $jvm generateHeapDump
/opt/IBM/WebSphere/AppServer/profiles/AppSrv01/./heapdump.20160618.225441.4808.0006.phd
wsadmin>

生成java核心

$AdminControl invoke $jvm dumpThreads

这将生成 thread dump ，并可在配置文件路径下找到。

您可以看到获取dump很容易，而且分析它们总是很有趣。在我下一篇文章中了解更多关于 how to analyze 的内容，用于应用程序故障排除。

姚伟斌

程序猿

我是姚伟斌，也被称为文景。我的专业领域涵盖了开放源代码的深度探索、网络编程和网络建站。我热衷于分享我的编程和建站实践经验，尤其擅长于Nginx和Proxy服务器的管理。此外，我还对Python和NodeJS这两种编程语言有着深刻的理解和独到的见解。

最近，我致力于爬虫技术的研究，探索如何通过高效的数据抓取为项目增添价值。我的目标是通过持续的学习和创新，为开放源代码社区贡献我的力量，并帮助那些对网络编程和网站建设感兴趣的人士。

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