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Spring Data findById（HashKey）挂起

[英]Spring Data findById (HashKey) hang

 原文  2018-09-24 23:10:16  8   1    java/ spring-data/ amazon-dynamodb/ amazon-kinesis

问题描述

I have a component(A) pom that refers 2 common component. 我有一个组件（A）pom，它引用2个常见组件。 One common component B that has all AWS DynamoDB configurations. 具有所有AWS DynamoDB配置的一个通用组件B。 Other common component C that has all Kinesis Client Lib configuration 具有所有Kinesis Client Lib配置的其他通用组件C

Component A is spring boot application and when I start as a Kinesis client consumer, the application starts without any issue. 组件A是spring boot应用程序，当我以Kinesis客户端使用者身份启动时，该应用程序启动没有任何问题。

When I send a request in the Kinesis stream, the requested event is consumed and we lookup DynamoDB based on the hashkey passed on the event. 当我在Kinesis流中发送请求时，所请求的事件被使用，并且我们基于在事件上传递的哈希键查找DynamoDB。 I could see the SimpleDynamoDBPagingAndSortingRepository is loading proper and fetching values from DB but the control never returns to my method (from my application side the control simply hangs). 我可以看到SimpleDynamoDBPagingAndSortingRepository正在加载正确的数据并从DB中获取值，但是控件从不返回我的方法（从我的应用程序一侧，控件只是挂起了）。 I could see a looping of multicast event happening internally in spring but not clear why. 我可以看到春季在内部发生了多播事件的循环，但不清楚原因。 

    @Id
@DynamoDBHashKey
private String key;

My POM dependencies are 我的POM依赖项是 

--- maven-dependency-plugin:3.0.2:tree (default-cli)  ---
[INFO] com.myteam.project:request-processor:jar:1.0.0-SNAPSHOT
[INFO] +- com.myteam.project:common-component:jar:1.0.0-SNAPSHOT:compile
[INFO] |  +-com.github.spullara.mustache.java:compiler:jar:0.9.2:compile
[INFO] |  +- org.apache.commons:commons-lang3:jar:3.7:compile
[INFO] |  +- org.springframework.retry:spring-retry:jar:1.2.2.RELEASE:compile
[INFO] |  +- org.slf4j:log4j-over-slf4j:jar:1.7.25:compile
[INFO] |  |  \- org.slf4j:slf4j-api:jar:1.7.25:compile
[INFO] |  +- com.amazonaws:aws-java-sdk-ses:jar:1.11.306:compile
[INFO] |  +- com.amazonaws:aws-java-sdk-sts:jar:1.11.306:compile
[INFO] |  +- com.amazonaws:aws-java-sdk-dynamodb:jar:1.11.306:compile
[INFO] |  |  \- com.amazonaws:aws-java-sdk-s3:jar:1.11.306:compile
[INFO] |  +- com.amazonaws:aws-java-sdk-kms:jar:1.11.306:compile
[INFO] |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.9.6:compile
[INFO] |  +- com.github.spring-data-dynamodb:spring-data-dynamodb:jar:5.0.2:compile
[INFO] |  |  +- org.springframework:spring-context:jar:5.0.9.RELEASE:compile
[INFO] |  |  +- org.springframework:spring-tx:jar:5.0.9.RELEASE:compile
[INFO] |  |  +- org.springframework.data:spring-data-commons:jar:2.0.10.RELEASE:compile
[INFO] |  |  +- org.hibernate:hibernate-validator:jar:5.2.4.Final:compile
 [INFO] |  |  \- javax.enterprise:cdi-api:jar:1.2:compile
 [INFO] |  |     +- javax.el:javax.el-api:jar:3.0.0:compile
 [INFO] |  |     +- javax.interceptor:javax.interceptor-api:jar:1.2:compile
[INFO] |  |     \- javax.inject:javax.inject:jar:1:compile
[INFO] |  +- io.springfox:springfox-swagger2:jar:2.4.0:compile
[INFO] |  |  +- io.swagger:swagger-annotations:jar:1.5.6:compile
[INFO] |  |  +- io.swagger:swagger-models:jar:1.5.6:compile
[INFO] |  |  +- io.springfox:springfox-spi:jar:2.4.0:compile
[INFO] |  |  |  \- io.springfox:springfox-core:jar:2.4.0:compile
[INFO] |  |  +- io.springfox:springfox-schema:jar:2.4.0:compile
[INFO] |  |  +- io.springfox:springfox-swagger-common:jar:2.4.0:compile
[INFO] |  |  +- io.springfox:springfox-spring-web:jar:2.4.0:compile
[INFO] |  |  +- com.fasterxml:classmate:jar:1.3.4:compile
[INFO] |  |  +- org.springframework.plugin:spring-plugin-core:jar:1.2.0.RELEASE:compile
[INFO] |  |  \- org.springframework.plugin:spring-plugin-metadata:jar:1.2.0.RELEASE:compile
[INFO] |  \- org.springframework.security:spring-security-crypto:jar:5.0.8.RELEASE:compile
[INFO] +- com.myteam.components:kinesis-client-library-component:jar:1.0.0-SNAPSHOT:compile
[INFO] |  +- commons-logging:commons-logging:jar:1.2:compile
[INFO] |  \- com.amazonaws:amazon-kinesis-client:jar:1.9.2:compile
[INFO] |     +- com.amazonaws:aws-java-sdk-cloudwatch:jar:1.11.306:compile
[INFO] |     +- com.google.protobuf:protobuf-java:jar:2.6.1:compile
[INFO] |     \- commons-lang:commons-lang:jar:2.6:compile
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:2.0.5.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter:jar:2.0.5.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot:jar:2.0.5.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot-autoconfigure:jar:2.0.5.RELEASE:compile
[INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:2.0.5.RELEASE:compile
[INFO] |  |  |  +- ch.qos.logback:logback-classic:jar:1.2.3:compile
[INFO] |  |  |  |  \- ch.qos.logback:logback-core:jar:1.2.3:compile
[INFO] |  |  |  +- org.apache.logging.log4j:log4j-to-slf4j:jar:2.10.0:compile
[INFO] |  |  |  |  \- org.apache.logging.log4j:log4j-api:jar:2.10.0:compile
[INFO] |  |  |  \- org.slf4j:jul-to-slf4j:jar:1.7.25:compile
[INFO] |  |  +- javax.annotation:javax.annotation-api:jar:1.3.2:compile
[INFO] |  |  \- org.yaml:snakeyaml:jar:1.19:runtime
[INFO] |  +- org.springframework.boot:spring-boot-starter-json:jar:2.0.5.RELEASE:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jdk8:jar:2.9.6:compile
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.9.6:compile
[INFO] |  |  \- com.fasterxml.jackson.module:jackson-module-parameter-names:jar:2.9.6:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter-tomcat:jar:2.0.5.RELEASE:compile
[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-core:jar:8.5.34:compile
[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-el:jar:8.5.34:compile
[INFO] |  |  \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:8.5.34:compile
[INFO] |  +- org.hibernate.validator:hibernate-validator:jar:6.0.12.Final:compile
[INFO] |  |  +- javax.validation:validation-api:jar:2.0.1.Final:compile
[INFO] |  |  \- org.jboss.logging:jboss-logging:jar:3.3.2.Final:compile
[INFO] |  +- org.springframework:spring-web:jar:5.0.9.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-beans:jar:5.0.9.RELEASE:compile
[INFO] |  \- org.springframework:spring-webmvc:jar:5.0.9.RELEASE:compile
[INFO] |     \- org.springframework:spring-expression:jar:5.0.9.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-actuator:jar:2.0.5.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-actuator-autoconfigure:jar:2.0.5.RELEASE:compile
[INFO] |  |  \- org.springframework.boot:spring-boot-actuator:jar:2.0.5.RELEASE:compile
[INFO] |  \- io.micrometer:micrometer-core:jar:1.0.6:compile
[INFO] |     +- org.hdrhistogram:HdrHistogram:jar:2.1.10:compile
[INFO] |     \- org.latencyutils:LatencyUtils:jar:2.0.3:compile
[INFO] +- org.springframework.boot:spring-boot-starter-aop:jar:2.0.5.RELEASE:compile
[INFO] |  +- org.springframework:spring-aop:jar:5.0.9.RELEASE:compile
[INFO] |  \- org.aspectj:aspectjweaver:jar:1.8.13:compile
[INFO] +- org.springframework.boot:spring-boot-starter-test:jar:2.0.5.RELEASE:test
[INFO] |  +- org.springframework.boot:spring-boot-test:jar:2.0.5.RELEASE:test
[INFO] |  +- org.springframework.boot:spring-boot-test-autoconfigure:jar:2.0.5.RELEASE:test
[INFO] |  +- com.jayway.jsonpath:json-path:jar:2.4.0:test
[INFO] |  |  \- net.minidev:json-smart:jar:2.3:test
[INFO] |  |     \- net.minidev:accessors-smart:jar:1.2:test
[INFO] |  |        \- org.ow2.asm:asm:jar:5.0.4:test
[INFO] |  +- junit:junit:jar:4.12:test
[INFO] |  +- org.assertj:assertj-core:jar:3.9.1:test
[INFO] |  +- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] |  +- org.hamcrest:hamcrest-library:jar:1.3:test
[INFO] |  +- org.skyscreamer:jsonassert:jar:1.5.0:test
[INFO] |  |  \- com.vaadin.external.google:android-json:jar:0.0.20131108.vaadin1:test
[INFO] |  +- org.springframework:spring-core:jar:5.0.9.RELEASE:compile
[INFO] |  |  \- org.springframework:spring-jcl:jar:5.0.9.RELEASE:compile
[INFO] |  +- org.springframework:spring-test:jar:5.0.9.RELEASE:test
[INFO] |  \- org.xmlunit:xmlunit-core:jar:2.5.1:test
[INFO] +- com.amazonaws:aws-java-sdk-kinesis:jar:1.11.306:compile
[INFO] |  +- com.amazonaws:aws-java-sdk-core:jar:1.11.306:compile
[INFO] |  |  +- software.amazon.ion:ion-java:jar:1.0.2:compile
[INFO] |  |  \- com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:jar:2.9.6:compile
[INFO] |  \- com.amazonaws:jmespath-java:jar:1.11.306:compile
[INFO] +- com.twilio.sdk:twilio:jar:7.17.0:compile
[INFO] |  +- com.google.guava:guava:jar:18.0:compile
[INFO] |  +- joda-time:joda-time:jar:2.9.9:compile
[INFO] |  +- io.jsonwebtoken:jjwt:jar:0.4:compile
[INFO] |  +- org.apache.httpcomponents:httpclient:jar:4.5.6:compile
[INFO] |  |  \- commons-codec:commons-codec:jar:1.11:compile
[INFO] |  +- org.apache.httpcomponents:httpcore:jar:4.4.10:compile
[INFO] |  +- com.fasterxml.jackson.core:jackson-core:jar:2.9.6:compile
[INFO] |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.9.0:compile
[INFO] |  \- javax.xml.bind:jaxb-api:jar:2.3.0:compile
[INFO] +- org.mockito:mockito-all:jar:1.10.19:test
[INFO] \- org.mockito:mockito-core:jar:2.21.0:test
[INFO]    +- net.bytebuddy:byte-buddy:jar:1.7.11:test
[INFO]    +- net.bytebuddy:byte-buddy-agent:jar:1.7.11:test
[INFO]    \- org.objenesis:objenesis:jar:2.6:test

Are there any conflicts with Spring jar based on my dependency metrics? 根据我的依赖性指标，与Spring jar是否有冲突？ Not sure why no exception is thrown back in this case. 不知道为什么在这种情况下不会抛出异常。

1 个解决方案

解决方案1
 0 已采纳  2018-09-28 05:49:13

The issue is resolved. 问题已解决。 Looks like, if we start Kinesis Worker as part of main thread, Spring data gets blocked while trying to synchronize on an object to multicast the "AfterLoad" event from DB. 看起来，如果我们将Kinesis Worker作为主线程的一部分启动，则在尝试在对象上进行同步以从DB组播“ AfterLoad”事件时，Spring数据将被阻塞。 I had to start the Kinesis worker in a separate thread to fix this. 我必须在单独的线程中启动Kinesis worker，以解决此问题。 Resolution is updated here https://github.com/derjust/spring-data-dynamodb/issues/201 分辨率在这里更新https://github.com/derjust/spring-data-dynamodb/issues/201

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