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增加对非root用户启动的JVM的支持 #50

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merged 4 commits into from
Nov 14, 2015
Merged

增加对非root用户启动的JVM的支持 #50

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c015835
增加对非root用户启动的JVM的支持
liuyangc3 Nov 9, 2015
e0f9930
增加对非root用户启动的jvm进程的支持
liuyangc3 Nov 12, 2015
8e05a71
增加说明
liuyangc3 Nov 12, 2015
93305e2
修改变量名
liuyangc3 Nov 12, 2015
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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@ source <(curl -fsSL https://raw.githubusercontent.com/oldratlee/useful-scripts/m

1. [show-busy-java-threads.sh](docs/java.md#beer-show-busy-java-threadssh)
打印出在运行的`Java`进程中，消耗`CPU`最多的线程栈。用于快速排查`Java`的性能问题。
如果执行脚本的用户不是root,需要前面加上sudo
1. [show-duplicate-java-classes](docs/java.md#beer-show-duplicate-java-classes)
找出`jar`文件和`class`目录中的重复类。用于排查`Java`类冲突问题。
1. [find-in-jars.sh](docs/java.md#beer-find-in-jarssh)
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22 changes: 14 additions & 8 deletions show-busy-java-threads.sh
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Expand Up @@ -83,30 +83,36 @@ cleanupWhenExit() {
trap "cleanupWhenExit" EXIT

printStackOfThread() {
local threadLine
local line
local count=1
while read threadLine ; do
local pid=`echo ${threadLine} | awk '{print $1}'`
local threadId=`echo ${threadLine} | awk '{print $2}'`
while IFS=" " read -a line ; do
local pid=${line[0]}
local threadId=${line[1]}
local threadId0x=`printf %x ${threadId}`
local user=`echo ${threadLine} | awk '{print $3}'`
local pcpu=`echo ${threadLine} | awk '{print $5}'`
local user=${line[2]}
local pcpu=${line[4]}

local jstackFile=/tmp/${uuid}_${pid}

[ ! -f "${jstackFile}" ] && {
jstack ${pid} > ${jstackFile} || {
{
if [ "${user}" == "${USER}" ];then
jstack ${pid} > ${jstackFile}
else
sudo -u ${user} jstack ${pid} > ${jstackFile}
fi
} || {
redEcho "Fail to jstack java process ${pid}!"
rm ${jstackFile}
continue
}
}

redEcho "[$((count++))] Busy(${pcpu}%) thread(${threadId}/0x${threadId0x}) stack of java process(${pid}) under user(${user}):"
sed "/nid=0x${threadId0x} /,/^$/p" -n ${jstackFile}
done
}


ps -Leo pid,lwp,user,comm,pcpu --no-headers | {
[ -z "${pid}" ] &&
awk '$4=="java"{print $0}' ||
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