Java问题排查工具单总结

tail -300f shopbase.log #倒数300行并进入实时监听文件写入模式

grep forest f.txt #文件查找
grep forest f.txt cpf.txt #多文件查找
grep 'log' /home/admin -r -n #目录下查找所有符合关键字的文件
cat f.txt | grep -i shopbase
grep 'shopbase' /home/admin -r -n --include *.{vm,java} #指定文件后缀
grep 'shopbase' /home/admin -r -n --exclude *.{vm,java} #反匹配
seq 10 | grep 5 -A 3 #上匹配
seq 10 | grep 5 -B 3 #下匹配
seq 10 | grep 5 -C 3 #上下匹配，平时用这个就妥了
cat f.txt | grep -c 'SHOPBASE'

awk '{print $4,$6}' f.txt
awk '{print NR,$0}' f.txt cpf.txt
awk '{print FNR,$0}' f.txt cpf.txt
awk '{print FNR,FILENAME,$0}' f.txt cpf.txt
awk '{print FILENAME,"NR="NR,"FNR="FNR,"$"NF"="$NF}' f.txt cpf.txt
echo 1:2:3:4 | awk -F: '{print $1,$2,$3,$4}'

awk '/ldb/ {print}' f.txt #匹配ldb
awk '!/ldb/ {print}' f.txt #不匹配ldb
awk '/ldb/ && /LISTEN/ {print}' f.txt #匹配ldb和LISTEN
awk '$5 ~ /ldb/ {print}' f.txt #第五列匹配ldb

sudo -u admin find /home/admin /tmp /usr -name \*.log(多个目录去找)
find . -iname \*.txt(大小写都匹配)
find . -type d(当前目录下的所有子目录)
find /usr -type l(当前目录下所有的符号链接)
find /usr -type l -name "z*" -ls(符号链接的详细信息 eg:inode,目录)
find /home/admin -size +250000k(超过250000k的文件，当然+改成-就是小于了)
find /home/admin f -perm 777 -exec ls -l {} \; (按照权限查询文件)
find /home/admin -atime -1 1天内访问过的文件
find /home/admin -ctime -1 1天内状态改变过的文件
find /home/admin -mtime -1 1天内修改过的文件
find /home/admin -amin -1 1分钟内访问过的文件
find /home/admin -cmin -1 1分钟内状态改变过的文件
find /home/admin -mmin -1 1分钟内修改过的文件

pgm -A -f vm-shopbase 'cat /home/admin/shopbase/logs/shopbase.log.2017-01-17|grep 2069861630'

tsar ##可以查看最近一天的各项指标

tsar --live ##可以查看实时指标，默认五秒一刷

tsar -d 20161218 ##指定查看某天的数据，貌似最多只能看四个月的数据

tsar --mem
tsar --load
tsar --cpu
##当然这个也可以和-d参数配合来查询某天的单个指标的情况

ps -ef | grep java
top -H -p pid

netstat -nat|awk '{print $6}'|sort|uniq -c|sort -rn
#查看当前连接，注意close_wait偏高的情况，比如如下

@OnMethod(clazz = "java.util.ArrayList", method="add", location = @Location(value = Kind.CALL, clazz = "/./", method = "/./"))
public static void m(@ProbeClassName String probeClass, @ProbeMethodName String probeMethod, @TargetInstance Object instance, @TargetMethodOrField String method) {
 
if(getInt(field("java.util.ArrayList", "size"), instance) > 479){
 println("check who ArrayList.add method:" + probeClass + "#" + probeMethod + ", method:" + method + ", size:" + getInt(field("java.util.ArrayList", "size"), instance));
 jstack();
 println();
 println("===========================");
 println();
}
}

@OnMethod(clazz = "com.taobao.sellerhome.transfer.biz.impl.C2CApplyerServiceImpl", method="nav", location = @Location(value = Kind.RETURN))
public static void mt(long userId, int current, int relation, String check, String redirectUrl, @Return AnyType result) {
 
 println("parameter# userId:" + userId + ", current:" + current + ", relation:" + relation + ", check:" + check + ", redirectUrl:" + redirectUrl + ", result:" + result);
}

sudo -u admin /opt/taobao/java/bin/jps -mlvV

sudo -u admin /opt/taobao/install/ajdk-8_1_1_fp1-b52/bin/jstack 2815

sudo -u admin /opt/taobao/install/ajdk-8_1_1_fp1-b52/bin/jstack -m 2815

sudo -u admin /opt/taobao/install/ajdk-8_1_1_fp1-b52/bin/jinfo -flags 2815

sudo -u admin /opt/taobao/install/ajdk-8_1_1_fp1-b52/bin/jmap -heap 2815

sudo -u admin /opt/taobao/install/ajdk-8_1_1_fp1-b52/bin/jmap -dump:live,format=b,file=/tmp/heap2.bin 2815

sudo -u admin /opt/taobao/install/ajdk-8_1_1_fp1-b52/bin/jmap -dump:format=b,file=/tmp/heap3.bin 2815

sudo -u admin /opt/taobao/install/ajdk-8_1_1_fp1-b52/bin/jmap -histo 2815 | head -10

sudo -u admin /opt/taobao/install/ajdk-8_1_1_fp1-b52/bin/jstat -gcutil 2815 1000

sudo -u admin /opt/taobao/java/bin/jdb -attach 8000

sudo -u admin /opt/taobao/java/bin/java -classpath /opt/taobao/java/lib/sa-jdi.jar sun.jvm.hotspot.CLHSDB

-XX:+TraceClassLoading
结果形如[Loaded java.lang.invoke.MethodHandleImpl$Lazy from D:\programme\jdk\jdk8U74\jre\lib\rt.jar]

-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/home/admin/logs/java.hprof
集团的vm参数里边基本都有这个选项

sudo dmesg|grep -i kill|less

date -d "1970-01-01 UTC `echo "$(date +%s)-$(cat /proc/uptime|cut -f 1 -d' ')+12288812.926194"|bc ` seconds"