線上問題排查常見腳本工具
show-busy-java-threads.sh
從全部的 Java 進程中找出最消耗 CPU 的線程（缺省5個），打印出其線程棧java
用法
./show-busy-java-threads.sh ./show-busy-java-threads.sh -c <要顯示的線程棧數> ./show-busy-java-threads.sh -c <要顯示的線程棧數> -p <指定的Java Process>
腳本
#!/bin/bash
# @Function
# Find out the highest cpu consumed threads of java, and print the stack of these threads.
#
# @Usage
# $ ./show-busy-java-threads.sh
#
# @author Jerry Lee
readonly PROG=`basename $0`
readonly -a COMMAND_LINE=("$0" "$@")
usage() {
cat <<EOF
Usage: ${PROG} [OPTION]...
Find out the highest cpu consumed threads of java, and print the stack of these threads.
Example: ${PROG} -c 10
Options:
-p, --pid find out the highest cpu consumed threads from the specifed java process,
default from all java process.
-c, --count set the thread count to show, default is 5
-h, --help display this help and exit
EOF
exit $1
}
readonly ARGS=`getopt -n "$PROG" -a -o c:p:h -l count:,pid:,help -- "$@"`
[ $? -ne 0 ] && usage 1
eval set -- "${ARGS}"
while true; do
case "$1" in
-c|--count)
count="$2"
shift 2
;;
-p|--pid)
pid="$2"
shift 2
;;
-h|--help)
usage
;;
--)
shift
break
;;
esac
done
count=${count:-5}
redEcho() {
[ -c /dev/stdout ] && {
# if stdout is console, turn on color output.
echo -ne "\033[1;31m"
echo -n "$@"
echo -e "\033[0m"
} || echo "$@"
}
yellowEcho() {
[ -c /dev/stdout ] && {
# if stdout is console, turn on color output.
echo -ne "\033[1;33m"
echo -n "$@"
echo -e "\033[0m"
} || echo "$@"
}
blueEcho() {
[ -c /dev/stdout ] && {
# if stdout is console, turn on color output.
echo -ne "\033[1;36m"
echo -n "$@"
echo -e "\033[0m"
} || echo "$@"
}
# Check the existence of jstack command!
if ! which jstack &> /dev/null; then
[ -z "$JAVA_HOME" ] && {
redEcho "Error: jstack not found on PATH!"
exit 1
}
! [ -f "$JAVA_HOME/bin/jstack" ] && {
redEcho "Error: jstack not found on PATH and $JAVA_HOME/bin/jstack file does NOT exists!"
exit 1
}
! [ -x "$JAVA_HOME/bin/jstack" ] && {
redEcho "Error: jstack not found on PATH and $JAVA_HOME/bin/jstack is NOT executalbe!"
exit 1
}
export PATH="$JAVA_HOME/bin:$PATH"
fi
readonly uuid=`date +%s`_${RANDOM}_$$
cleanupWhenExit() {
rm /tmp/${uuid}_* &> /dev/null
}
trap "cleanupWhenExit" EXIT
printStackOfThreads() {
local line
local count=1
while IFS=" " read -a line ; do
local pid=${line[0]}
local threadId=${line[1]}
local threadId0x="0x`printf %x ${threadId}`"
local user=${line[2]}
local pcpu=${line[4]}
local jstackFile=/tmp/${uuid}_${pid}
[ ! -f "${jstackFile}" ] && {
{
if [ "${user}" == "${USER}" ]; then
jstack ${pid} > ${jstackFile}
else
if [ $UID == 0 ]; then
sudo -u ${user} jstack ${pid} > ${jstackFile}
else
redEcho "[$((count++))] Fail to jstack Busy(${pcpu}%) thread(${threadId}/${threadId0x}) stack of java process(${pid}) under user(${user})."
redEcho "User of java process($user) is not current user($USER), need sudo to run again:"
yellowEcho " sudo ${COMMAND_LINE[@]}"
echo
continue
fi
fi
} || {
redEcho "[$((count++))] Fail to jstack Busy(${pcpu}%) thread(${threadId}/${threadId0x}) stack of java process(${pid}) under user(${user})."
echo
rm ${jstackFile}
continue
}
}
blueEcho "[$((count++))] Busy(${pcpu}%) thread(${threadId}/${threadId0x}) stack of java process(${pid}) under user(${user}):"
sed "/nid=${threadId0x} /,/^$/p" -n ${jstackFile}
done
}
ps -Leo pid,lwp,user,comm,pcpu --no-headers | {
[ -z "${pid}" ] &&
awk '$4=="java"{print $0}' ||
awk -v "pid=${pid}" '$1==pid,$4=="java"{print $0}'
} | sort -k5 -r -n | head --lines "${count}" | printStackOfThreads
show-duplicate-java-classes
找出Java Lib（Java庫，即Jar文件）或Class目錄（類目錄）中的重複類。python
經過腳本參數指定Libs目錄，查找目錄下Jar文件，
收集Jar文件中Class文件以分析重複類。能夠指定多個Libs目錄。git
注意，只會查找這個目錄下Jar文件，不會查找子目錄下Jar文件。
由於Libs目錄通常不會用子目錄再放Jar，這樣也避免把去查找不指望Jar。
經過 -c 選項指定 Class 目錄，直接收集這個目錄下的 Class 文件以分析重複類。能夠指定多個目錄。github
用法
# 查找當前目錄下全部Jar中的重複類 ./show-duplicate-java-classes 查找多個指定目錄下全部Jar中的重複類 ./show-duplicate-java-classes path/to/lib_dir1 /path/to/lib_dir2 查找多個指定Class目錄下的重複類。 class 目錄 經過 -c 選項指定 ./show-duplicate-java-classes -c path/to/class_dir1 -c /path/to/class_dir2 查找指定Class目錄和指定目錄下全部Jar中的重複類的Jar ./show-duplicate-java-classes path/to/lib_dir1 /path/to/lib_dir2 -c path/to/class_dir1 -c path/to/class_dir2
腳本
#!/usr/bin/env python
# -*- coding: utf-8 -*-
__author__ = 'tg123'
from glob import glob
from os import walk
from zipfile import ZipFile
from os.path import relpath, isdir
from optparse import OptionParser
def list_jar_file_under_lib_dirs(libs):
jar_files = set()
for lib in libs:
if isdir(lib):
jar_files |= {f for f in glob(lib + '/*.jar')}
else:
jar_files.add(lib)
return jar_files
def list_class_under_jar_file(jar_file):
return {f for f in ZipFile(jar_file).namelist() if f.lower().endswith('.class')}
def list_class_under_class_dir(class_dir):
return {relpath(dir_path + "/" + filename, class_dir)
for dir_path, _, file_names in walk(class_dir)
for filename in file_names if filename.lower().endswith('.class')}
def expand_2_class_path(jar_files, class_dirs):
java_class_2_class_paths = {}
# list all classes in jar files
for jar_file in jar_files:
for class_file in list_class_under_jar_file(jar_file):
java_class_2_class_paths.setdefault(class_file, set()).add(jar_file)
# list all classes in class dir
for class_dir in class_dirs:
for class_file in list_class_under_class_dir(class_dir):
java_class_2_class_paths.setdefault(class_file, set()).add(class_dir)
return java_class_2_class_paths, jar_files | set(class_dirs)
def find_duplicate_classes(java_class_2_class_paths):
class_path_2_duplicate_classes = {}
for java_class, class_paths in list(java_class_2_class_paths.items()):
if len(class_paths) > 1:
classes = class_path_2_duplicate_classes.setdefault(frozenset(class_paths), set())
classes.add(java_class)
return class_path_2_duplicate_classes
def print_class_paths(class_paths):
print()
print("=" * 80)
print("class paths to find:")
print("=" * 80)
for idx, class_path in enumerate(class_paths):
print(("%-3d: %s" % (idx + 1, class_path)))
if __name__ == '__main__':
optionParser = OptionParser('usage: %prog '
'[-c class-dir1 [-c class-dir2] ...] '
'[lib-dir1|jar-file1 [lib-dir2|jar-file2] ...]')
optionParser.add_option("-c", "--class-dir", dest="class_dirs", default=[], action="append", help="add class dir")
options, libs = optionParser.parse_args()
if not options.class_dirs and not libs:
libs = ['.']
java_class_2_class_paths, class_paths = expand_2_class_path(
list_jar_file_under_lib_dirs(libs), options.class_dirs)
class_path_2_duplicate_classes = find_duplicate_classes(java_class_2_class_paths)
if not class_path_2_duplicate_classes:
print("COOL! No duplicate classes found!")
print_class_paths(class_paths)
exit()
print("Found duplicate classes in below class path:")
for idx, jars in enumerate(class_path_2_duplicate_classes):
print("%-3d(%d@%d): %s" % (idx + 1, len(class_path_2_duplicate_classes[jars]), len(jars), " ".join(jars)))
print()
print("=" * 80)
print("Duplicate classes detail info:")
print("=" * 80)
for idx, (jars, classes) in enumerate(class_path_2_duplicate_classes.items()):
print("%-3d(%d@%d): %s" % (idx + 1, len(class_path_2_duplicate_classes[jars]), len(jars), " ".join(jars)))
for i, c in enumerate(classes):
print("\t%-3d %s" % (i + 1, c))
print_class_paths(class_paths)
exit(1)
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相關文章
- 1. Arthas:線上問題排查工具
- 2. BTrace:線上問題排查工具
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