并行查询服务器意外死亡

Question

我正在使用Oracle sql开发人员运行SQL查询，在AWS计算机上连接4个表。数据库是Oracle11g2。 简单查询工作正常，但此特定查询无法运行，并出现以下错误：

    12805. 00000 -  "parallel query server died unexpectedly"
*Cause:    A parallel query server died unexpectedly, PMON cleaning
           up the process.
*Action:   Check your system for anomalies and reissue the statement.
           If this error persists, contact Oracle Support Services.
           See trace file for more details.

在搜索结果中模糊地描述了错误，并且没有具体的解决方案。很高兴能得到这个帮助。