Linux Java thread 100% problem locating method

I. BACKGROUND

The development of the Internet today, many problems will be encountered in the production, if one day found that the system resources in the CPU occupied 100%, has been high, then we need to query the problem.

Second, the solution of ideas

1. View that Java process occupies the most, top command

[Email protected] test]# top-h

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2, can obviously see the PID 29003 Java process occupies the highest cup, has occupied 95.5%, can be further viewed according to the process number of the thread of the process. Displays the CPU resource consumption for each thread in the process.

[Email protected] test]# top-h-P 29003

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3. After finding the most occupied PID29003, use Jstack to print the thread stack information to the stack file, such as:

[Email protected] atm]# jstack-l-F 29003 >29003.stack

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At this point, the thread stack information has been printed into the 29003.stack file, you can use the cat and other commands to view the file.

4, find 29003 of the front and back 20 lines of information (20 lines not enough can be 50 lines or more), and show out:

[[email protected] test]# cat 29003.stack |grep-a 20 ' 29003 '

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As shown, you can pinpoint exactly which method in the class is causing the problem to occur, and then resolve it according to the code one by one.

This article is from the "Yao Sea" blog, please be sure to keep this source http://tl2011.blog.51cto.com/6006611/1897118

Linux Java thread 100% problem locating method