maven lifeCycle
2021-8-2 Saber
标签: maven
使用planuml分析springboot、springCloud、SpringCloudAlibaba的pom依赖关系
2021-7-29 Saber
springboot@startuml
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skinparam shadowing false
rectangle "spring-boot-build:2.2.14.RELEASE" as bootBuild #lightgreen
rectangle "spring-boot-dependencies:2.2.14.RELEASE" as bootDependencies #lightgreen
rectangle "spring-boot-parent:2.2.14.RELEASE" as bootParent #lightgreen
rectangle "spring-boot:2.2.14.RELEASE" as bootCore #skyblue
rectangle "spring-boot-actuator:2.2.14.RELEASE" as bootActuator #skyblue
rectangle "spring-boot-starters:2.2.14.RELEASE" as bootStarters #skyblue
rectangle "spring-boot-devtools:2.2.14.RELEASE" as bootDevtools #skyblue
rectangle "..." as bootParentOther #skyblue
rectangle "spring-boot-starter:2.2.14.RELEASE" as bootStarter
rectangle "spring-boot-starter-activemq:2.2.14.RELEASE" as bootStarterActivemq #yellow
rectangle "spring-boot-starter-aop:2.2.14.RELEASE" as bootStarterAop #yellow
rectangle "..." as starterOther
bootBuild <|-- bootDependencies
bootDependencies <|-- bootParent
bootParent <|-- bootCore
bootParent <|-- bootActuator
bootParent <|-- bootDevtools
bootParent <|-- bootStarters
bootParent <|-- bootParentOther
bootStarters <|-- bootStarter
bootStarters <|-- bootStarterActivemq
bootStarters <|-- bootStarterAop
bootStarters <|-- starterOther
bootStarter ..> bootCore
bootStarterActivemq ..> bootStarter
bootStarterAop ..> bootStarter
@enduml
springCloud
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skinparam shadowing false
rectangle "spring-boot-dependencies:2.2.14.RELEASE" as bootDependencies #pink
rectangle "spring-cloud-build-dependencies:2.2.14.RELEASE" as dependencies #pink
rectangle "spring-cloud-build:2.2.14.RELEASE" as build #pink
rectangle "spring-cloud-dependencies-parent:2.2.14.RELEASE" as dependenciesParent #pink
rectangle "spring-cloud-gateway-dependencies:2.2.14.RELEASE" as gatewayDependencies #lightgreen
rectangle "spring-cloud-gateway:2.2.14.RELEASE" as buildGateway #lightgreen
rectangle "spring-cloud-gateway-core:2.2.14.RELEASE" as gatewayCore
rectangle "spring-cloud-starter-gateway:2.2.14.RELEASE" as gatewayStarter #yellow
rectangle "spring-cloud-gateway-mvc:2.2.14.RELEASE" as gatewayMVC
rectangle "spring-cloud-gateway-sample:2.2.14.RELEASE" as gatewaySample
rectangle "spring-cloud-gateway-server:2.2.14.RELEASE" as gatewayServer
rectangle "spring-cloud-gateway-webflux:2.2.14.RELEASE" as gatewayWebflux
rectangle "spring-cloud-commons-dependencies:2.2.14.RELEASE" as cloudCommonsDependencies #pink
rectangle "spring-cloud-netflix-dependencies:2.2.14.RELEASE" as cloudNetflixDependencies #pink
rectangle "spring-cloud-circuitbreaker-dependencies:2.2.14.RELEASE" as cloudCircuitbreakerDependencies #pink
bootDependencies <|-- dependencies
build <|-- buildGateway
dependenciesParent <|-- gatewayDependencies
buildGateway <|-- gatewayCore
buildGateway <|-- gatewayMVC
buildGateway <|-- gatewaySample
buildGateway <|-- gatewayServer
buildGateway <|-- gatewayWebflux
buildGateway <|-- gatewayStarter
build o-- dependencies #gray
gatewayDependencies --o buildGateway #gray
cloudCommonsDependencies --o buildGateway #gray
cloudNetflixDependencies --o buildGateway #gray
cloudCircuitbreakerDependencies --o buildGateway #gray
@enduml
SpringCloudAlibaba
@startuml
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skinparam shadowing false
rectangle "spring-cloud-build:2.3.1.RELEASE" as cloudBuild #pink
rectangle "spring-cloud-alibaba:2.2.6-SNAPSHOT" as cloudAlibaba #lightgreen
rectangle "spring-boot-dependencies:2.3.2.RELEASE" as bootDependencies #lightblue
rectangle "spring-cloud-dependencies:Hoxton.SR9" as cloudDependencies #pink
rectangle "dubbo-dependencies-bom:2.7.8" as dubboDependencies #pink
rectangle "spring-cloud-dependencies-parent:2.3.1.RELEASE" as cloudDependenciesParent #pink
rectangle "spring-cloud-alibaba-dependencies:2.2.6-SNAPSHOT" as cloudAlibabaDependencies #lightgreen
rectangle "spring-cloud-alibaba-starters:2.2.6-SNAPSHOT" as cloudAlibabaStarter #grey
rectangle "spring-cloud-starter-dubbo:2.2.6-SNAPSHOT" as starterDubbo #yellow
rectangle "spring-cloud-starter-alibaba-nacos-discovery:2.2.6-SNAPSHOT" as starterNacosDiscovery #yellow
rectangle "..." as starterOther #yellow
rectangle "spring-cloud-alibaba-examples:2.2.6-SNAPSHOT" as alibabaExamples
rectangle "nacos-config-example:2.2.6-SNAPSHOT" as nacosConfigExamples
rectangle "spring-cloud-alibaba-dubbo-examples:2.2.6-SNAPSHOT" as dubboExamples
rectangle "..." as exampleOther
cloudBuild <|-- cloudAlibaba
cloudDependenciesParent <|-- cloudAlibabaDependencies
cloudDependenciesParent <|-- cloudDependencies
cloudAlibabaDependencies --o cloudAlibaba #gray
bootDependencies --o cloudAlibaba #gray
cloudDependencies --o cloudAlibaba #gray
dubboDependencies --o cloudAlibaba #gray
cloudAlibaba <|-- cloudAlibabaStarter
cloudAlibabaStarter <|-- starterDubbo
cloudAlibabaStarter <|-- starterNacosDiscovery
cloudAlibabaStarter <|-- starterOther
cloudAlibaba <|-- alibabaExamples
alibabaExamples <|-- nacosConfigExamples
alibabaExamples <|-- dubboExamples
alibabaExamples <|-- exampleOther
@enduml
标签: java springboot springcloud planuml
JVM排查问题
2021-7-28 Saber
CPU占用飙升
1. top 找到CPU占用最大的进程 （shift+c按CPU占用量排序）
2. top -Hp pid 找到进程中CPU占用最大的线程
3. printf '%x' ThreadId 将线程ID转换成十六进制
4. jstack pid|grep 'ThreadId' -C5 -color 打印堆栈信息
查找死锁
1. jps -l
2. jstack -l pid 打印堆栈信息
内存泄漏
1. jmap -head pid 查看内存使用情况
2. jstat -gcutil pid 1000 查看GC情况
3. jmap -histo:live pid|more 查看对象内存占用情况（执行之后，会造成jvm强制执行一次GC，线上谨慎使用）
Memory Analyzer Tool (MAT)
1. jmap -dump:format=b,file=/root/dump.hprof pid 导出堆快照文件
2. 用MAT进行分析
minor gc、major gc、full gc执行频率，计算时间占比。
其他：
1.1 Jstat 查看堆内存、元数据各部分的使用量，以及加载类的数量。
1.2 Jinfo 用来查看正在运行的java应用程序的扩展参数（JVM中-X标示的参数），甚至支持在运行时修改部分参数。
1.3 Jstack 用于查看线程状态。
1.4 Jmap JVM Memory Map命令用于生成heap dump文件,还可以查询finalize执行队列、Java堆和永久代的详细信息，如当前使用率、当前使用的是哪种收集器等。
1.5 Jhat (web版本的MAT)配合Jmap导出的dump文件使用。jhat内置http server，用hql语法查看dump文件。
1.6 Jprofier 分析内存分布情况，定位内存泄漏等问题。