java - JPA事务异常获取真正原因 - 嵌套异常

Question

我使用 openjpa 并使用存储和提交。

Commit 有时会引发异常，但我无法获得更高的精度。

有时，我猜这是完整性问题(存储两次相同的日期)。

错误消息和堆栈是:

The transaction has been rolled back.  See the nested exceptions for details on the errors that occurred.
<openjpa-2.4.1-r422266:1730418 fatal store error> org.apache.openjpa.persistence.RollbackException: The transaction has been rolled back.  See the nested exceptions for details on the errors that occurred.
...

但是在哪里可以找到更详细的原因，或者如何获取嵌套异常？

谢谢

Answer 1

有同样的问题，JPA 提交嵌套了 JPA 持久调用中的异常并隐藏它们，因为我只使用了 e.getMessage()

public static List<String> getExceptionMessageChain(Throwable throwable) {
   List<String> result = new ArrayList<String>();
   while (throwable != null) {
      result.add(throwable.getMessage());
      throwable = throwable.getCause();
   }
   return result; //["THIRD EXCEPTION", "SECOND EXCEPTION", "FIRST EXCEPTION"]
}

catch(Exception e) {
   // JPA Exceptions can be nested, need to get entire chain
   getExceptionMessageChain(e).forEach(System.out::println);
}

来源: Get detail messages of chained exceptions Java