show-busy-java-threads.sh

从所有的 Java 进程中找出最消耗 CPU 的线程（缺省5个），打印出其线程栈

用法

./show-busy-java-threads.sh./show-busy-java-threads.sh -c 
    <要显示的线程栈数>
     ./show-busy-java-threads.sh -c 
     <要显示的线程栈数>
       -p 
      <指定的java process>
     
    

脚本

#!/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 Leereadonly PROG=`basename $0`readonly -a COMMAND_LINE=("$0" "$@")usage() {    cat <
    
      /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:$PATH"fireadonly uuid=`date +%s`_${RANDOM}_$$cleanupWhenExit() {    rm /tmp/${uuid}_* &> /dev/null}trap "cleanupWhenExit" EXITprintStackOfThreads() {    local line    local count=1    while IFS=" " read -a line ; do        local pid=${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库，即Jar文件）或Class目录（类目录）中的重复类。

通过脚本参数指定Libs目录，查找目录下Jar文件，

注意，只会查找这个目录下Jar文件，不会查找子目录下Jar文件。

用法

# 查找当前目录下所有Jar中的重复类./show-duplicate-java-classes查找多个指定目录下所有Jar中的重复类./show-duplicate-java-classes path/to/lib_dir1 /path/to/lib_dir2查找多个指定Class目录下的重复类。 class 目录 通过 -c 选项指定./show-duplicate-java-classes -c path/to/class_dir1 -c /path/to/class_dir2查找指定Class目录和指定目录下所有Jar中的重复类的Jar./show-duplicate-java-classes path/to/lib_dir1 /path/to/lib_dir2 -c path/to/class_dir1 -c path/to/class_dir2

脚本

#!/usr/bin/env python# -*- coding: utf-8 -*-__author__ = 'tg123'from glob import globfrom os import walkfrom zipfile import ZipFilefrom os.path import relpath, isdirfrom optparse import OptionParserdef 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_filesdef 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_classesdef 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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