尽管有异常处理，Spring Boot“ DoneCallback中发生未捕获的异常”仍关闭了应用程序

Question

我正在运行一个与30个并行运行的应用程序并行运行的应用程序，因此我遇到了需要处理的冲突问题。

我从下面的代码中获取以下异常。 我不清楚为什么不处理异常。

即使我有逻辑来捕获调用此代码的代码中的异常，该异常也会导致Spring Boot应用程序停止运行。 异常处理有多个级别，但未处理异常。

    // check to see if the product exists
    if (repository.existsByAsin(asin))
       sPFBT2 = repository.findByAsin(asin).get(
    } else {

      //product does not exists.. create product
     sPFBT2 = new SProduct(asin, new Long(0));
     sPFBT2.setDownload(new Download(sPFBT2)));
    try {
        repository.saveAndFlush(sPFBT2);
    } catch (Exception e)
      //product does exists.. find in database
      sPFBT2 = null;
      sPFBT2 = findByAsin(asin).get(0);
      sPFBT2.setDownload(new Download(sPFBT2);
      repository.saveAndFlush(sPFBT2);
     }
    }




<record>
  <date>2018-11-06T11:29:51</date>
  <millis>1541503791418</millis>
  <sequence>211</sequence>
  <logger>org.jdeferred.impl.AbstractPromise</logger>
  <level>SEVERE</level>
  <class>org.jdeferred.impl.AbstractPromise</class>
  <method>triggerDone</method>
  <thread>23</thread>
  <message>an uncaught exception occured in a DoneCallback</message>
  <exception>
    <message>org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [idx_downloadProduct]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement</message>
    <frame>
      <class>org.springframework.orm.jpa.vendor.HibernateJpaDialect</class>
      <method>convertHibernateAccessException</method>
      <line>259</line>
    </frame>
    <frame>
      <class>org.springframework.orm.jpa.vendor.HibernateJpaDialect</class>
      <method>translateExceptionIfPossible</method>
      <line>225</line>
    </frame>
    <frame>
      <class>org.springframework.orm.jpa.AbstractEntityManagerFactoryBean</class>
      <method>translateExceptionIfPossible</method>
      <line>527</line>
    </frame>
    <frame>
      <class>org.springframework.dao.support.ChainedPersistenceExceptionTranslator</class>
      <method>translateExceptionIfPossible</method>
      <line>61</line>
    </frame>
    <frame>
      <class>org.springframework.dao.support.DataAccessUtils</class>
      <method>translateIfNecessary</method>
      <line>242</line>
    </frame>
    <frame>
      <class>org.springframework.dao.support.PersistenceExceptionTranslationInterceptor</class>
      <method>invoke</method>
      <line>153</line>
    </frame>
    <frame>
      <class>org.springframework.aop.framework.ReflectiveMethodInvocation</class>
      <method>proceed</method>
      <line>185</line>
    </frame>
    <frame>
      <class>org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor</class>
      <method>invoke</method>
      <line>135</line>
    </frame>
    <frame>
      <class>org.springframework.aop.framework.ReflectiveMethodInvocation</class>
      <method>proceed</method>
      <line>185</line>
    </frame>
    <frame>
      <class>org.springframework.aop.interceptor.ExposeInvocationInterceptor</class>
      <method>invoke</method>
      <line>92</line>
    </frame>
    <frame>
      <class>org.springframework.aop.framework.ReflectiveMethodInvocation</class>
      <method>proceed</method>
      <line>185</line>
    </frame>
    <frame>
      <class>org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor</class>
      <method>invoke</method>
      <line>61</line>
    </frame>
    <frame>
      <class>org.springframework.aop.framework.ReflectiveMethodInvocation</class>
      <method>proceed</method>
      <line>185</line>
    </frame>
    <frame>
      <class>org.springframework.aop.framework.JdkDynamicAopProxy</class>
      <method>invoke</method>
      <line>212</line>
    </frame>
    <frame>
      <class>com.sun.proxy.$Proxy81</class>
      <method>saveAndFlush</method>
    </frame>
    <frame>
      <class>com.jahtoe.tech.fbtdownloader.KEEPA</class>
      <method>lambda$getProductsInfo$1</method>
      <line>222</line>
    </frame>
    <frame>
      <class>org.jdeferred.impl.AbstractPromise</class>
      <method>triggerDone</method>
      <line>107</line>
    </frame>
    <frame>
      <class>org.jdeferred.impl.AbstractPromise</class>
      <method>triggerDone</method>
      <line>98</line>
    </frame>
    <frame>
      <class>org.jdeferred.impl.DeferredObject</class>
      <method>resolve</method>
      <line>70</line>
    </frame>
    <frame>
      <class>com.keepa.api.backend.KeepaAPI</class>
      <method>lambda$sendRequest$2</method>
      <line>180</line>
    </frame>
    <frame>
      <class>java.util.concurrent.ThreadPoolExecutor</class>
      <method>runWorker</method>
      <line>1149</line>
    </frame>
    <frame>
      <class>java.util.concurrent.ThreadPoolExecutor$Worker</class>
      <method>run</method>
      <line>624</line>
    </frame>
    <frame>
      <class>java.lang.Thread</class>
      <method>run</method>
      <line>748</line>
    </frame>
  </exception>
</record>