If there is a problem writing to any log path, DB2 will write a message in the administration notification log stating that an error has been encountered.
如果将副本写入镜像日志路径时发生问题，那么DB2将在管理通知日志中写入消息，指出已经碰到错误。
Unlike an Exception, a Signal is typically expected to be thrown during normal Process execution and does not necessarily indicate that a problem or something unexpected has been encountered.
不同于Exception，Signal通常是在正常流程执行过程中引发的，不一定表示遇到了问题或某些意外情况。
Unlike an Exception, a Signal is typically expected to be thrown during normal Process execution and does not necessarily indicate that a problem or something unexpected has been encountered.
不同于Exception，Signal通常是在正常流程执行过程中引发的，不一定表示遇到了问题或某些意外情况。
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