本文介绍:watch的使用
7.watch命令
watch命令,在排查复线线上问题时非常有效。
1. 监控com.runlion.fsp.credit.service.impl.CreditServiceImpl 类的listCreditAndUserOnCondition方法返回值,及方法耗时:
$ watch com.runlion.fsp.credit.service.impl.CreditServiceImpl listCreditAndUserOnCondition returnObj
然后就会阻塞状态,线上排查问题时,这时就可以去重新触发此方法,查看返回值信息
$ watch com.runlion.fsp.credit.service.impl.CreditServiceImpl listCreditAndUserOnCondition returnObj
Press Q or Ctrl+C to abort.
Affect(class-cnt:2 , method-cnt:2) cost in 203 ms.
ts=2019-09-03 19:14:48; [cost=364.531509ms] result=@FspPageInfo[
pageNum=@Integer[1],
pageSize=@Integer[20],
total=@Long[234],
pages=@Integer[12],
result=@Page[isEmpty=false;size=20],
]
ts=2019-09-03 19:14:48; [cost=403.969714ms] result=@FspPageInfo[
pageNum=@Integer[1],
pageSize=@Integer[20],
total=@Long[234],
pages=@Integer[12],
result=@Page[isEmpty=false;size=20],
]
显然,整个结果我们并不满意,我们想看人能读懂的数据。
watch有多个参数:
2. 我们注意最后一个,指定属性遍历深度,刚才的遍历深度没有指定,默认为1,所以没有具体到数据,我们设置为3看一下:
$ watch com.runlion.fsp.credit.service.impl.CreditServiceImpl listCreditAndUserOnCondition returnObj -x 3
$ watch com.runlion.fsp.credit.service.impl.CreditServiceImpl listCreditAndUserOnCondition returnObj -x 3
Press Q or Ctrl+C to abort.
Affect(class-cnt:2 , method-cnt:2) cost in 205 ms.
ts=2019-09-03 19:21:37; [cost=419.18139ms] result=@FspPageInfo[
pageNum=@Integer[1],
pageSize=@Integer[20],
total=@Long[234],
pages=@Integer[12],
result=@Page[
@CreditDetailVo[
creditId=@String[CRED19090300001871],
userName=@String[15995055310],
realName=@String[溧阳市神马机电设备安装有限公司],
phone=@String[15995055310],
userProp=@Integer[1],
userPropStr=@String[供应商],
userType=@Integer[1],
userTypeStr=@String[企业],
productId=@String[LPRO19080800000001],
productName=@String[自助贷],
relatedCompanyName=@String[漳平红狮水泥有限公司],
moneyResourceOrganizationName=null,
creditTotal=@BigDecimal[46800.00],
creditUsed=@BigDecimal[0.00],
creditResidue=@BigDecimal[42545.45],
deleted=@Integer[0],
deletedStr=@String[正常],
gmtCreate=@Date[2019-09-03 16:56:41,000],
channelUserName=@String[20500030],
],
@CreditDetailVo[
creditId=@String[CRED19090300001872],
userName=@String[15995055310],
realName=@String[溧阳市神马机电设备安装有限公司],
phone=@String[15995055310],
userProp=@Integer[1],
userPropStr=@String[供应商],
userType=@Integer[1],
userTypeStr=@String[企业],
productId=@String[LPRO19080800000002],
productName=@String[应收账款质押贷],
relatedCompanyName=@String[漳平红狮水泥有限公司],
moneyResourceOrganizationName=null,
creditTotal=@BigDecimal[46800.00],
creditUsed=@BigDecimal[0.00],
creditResidue=@BigDecimal[42545.45],
deleted=@Integer[0],
deletedStr=@String[正常],
gmtCreate=@Date[2019-09-03 16:56:41,000],
channelUserName=@String[20500030],
],
3. 我们同时监控入参和出参:
页面请求时设置startTimeF和endTimeF两个参数,然后监控结果:
$ watch com.runlion.fsp.credit.service.impl.CreditServiceImpl listCreditAndUserOnCondition "{params,returnObj}" -x 3
$ watch com.runlion.fsp.credit.service.impl.CreditServiceImpl listCreditAndUserOnCondition "{params,returnObj}" -x 3
Press Q or Ctrl+C to abort.
Affect(class-cnt:2 , method-cnt:2) cost in 183 ms.
ts=2019-09-03 19:29:58; [cost=336.416578ms] result=@ArrayList[
@Object[][
@CreditDto[
creditId=null,
realName=null,
phone=null,
relatedCompanyName=null,
productId=null,
deleted=null,
startTimeF=@Date[2019-08-01 00:00:00,000],
endTimeF=@Date[2019-09-30 23:59:59,000],
pageNum=@Integer[1],
pageSize=@Integer[20],
],
],
@FspPageInfo[
pageNum=@Integer[1],
pageSize=@Integer[20],
total=@Long[58],
pages=@Integer[3],
result=@Page[
@CreditDetailVo[CreditDetailVo(creditId=CRED19090300001872, userName=15995055310, realName=溧阳市神马机电设备安装有限公司, phone=15995055310, userProp=1, userPropStr=供应商, userType=1, userTypeStr=企业, productId=LPRO19080800000002, productName=应收账款质押贷, relatedCompanyName=漳平红狮水泥有限公司, moneyResourceOrganizationName=null, creditTotal=46800.00, creditUsed=0.00, creditResidue=42545.45, deleted=0, deletedStr=正常, gmtCreate=Tue Sep 03 16:56:41 CST 2019, channelUserName=20500030)],
@CreditDetailVo[CreditDetailVo(creditId=CRED19090300001871, userName=15995055310, realName=溧阳市神马机电设备安装有限公司, phone=15995055310, userProp=1, userPropStr=供应商, userType=1, userTypeStr=企业, productId=LPRO19080800000001, productName=自助贷, relatedCompanyName=漳平红狮水泥有限公司, moneyResourceOrganizationName=null, creditTotal=46800.00, creditUsed=0.00, creditResidue=42545.45, deleted=0, deletedStr=正常, gmtCreate=Tue Sep 03 16:56:41 CST 2019, channelUserName=20500030)]
4. 观察当前对象中的属性
$ watch com.runlion.fsp.credit.service.impl.CreditServiceImpl listCreditAndUserOnCondition "target" -x 3
Press Q or Ctrl+C to abort.
Affect(class-cnt:2 , method-cnt:2) cost in 189 ms.
ts=2019-09-03 19:34:52; [cost=313.479341ms] result=@CreditServiceImpl[
log=@Logger[
serialVersionUID=@Long[5454405123156820674],
FQCN=@String[ch.qos.logback.classic.Logger],
name=@String[com.runlion.fsp.credit.service.impl.CreditServiceImpl],
level=null,
effectiveLevelInt=@Integer[20000],
parent=@Logger[
serialVersionUID=@Long[5454405123156820674],
FQCN=@String[ch.qos.logback.classic.Logger],
name=@String[com.runlion.fsp.credit.service.impl],
level=null,
effectiveLevelInt=@Integer[20000],
parent=@Logger[Logger[com.runlion.fsp.credit.service]],
childrenList=@CopyOnWriteArrayList[isEmpty=false;size=5],
aai=null,
additive=@Boolean[true],
loggerContext=@LoggerContext[ch.qos.logback.classic.LoggerContext[default]],
],
childrenList=null,
aai=null,
additive=@Boolean[true],
更具体的watch使用信息,可参考:https://github.com/alibaba/arthas/blob/master/site/src/site/sphinx/watch.md
转载:https://blog.csdn.net/weixin_39800144/article/details/100526503
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