文档解释
ORA-39107: Master process string violated startup protocol. Master error:
Cause: The master process whose name is listed started up but then exited before notifying the creating process that it was finished with initialization.
Action: Refer to any following error messages for possible actions. Also, check the trace log for the failed process, if one was created, to see if there is any additional information about the failure. Correct the error, if possible, and try the operation again. If the error occurs again, contact Oracle Customer Support and report the error.
ORA-39107错误通常是由Oracle 数据库在启动期间出现崩溃，使得master进程不能正确连接到Oracle实例时引发的。
官方解释
ORA-39107:Master process string violated startup protocol.
Cause: A crash detected by the master process string could not be resolved in the normal manner.
Action: Check trace files and/or contact Oracle Support Services.
常见案例
普通情况下，在Oracle实例启动时，master进程字符串会在启动过程中产生错误，从而引发ORA-39107错误。
一般处理方法及步骤
1.检查ORACLE_HOME路径是否正确设置，检查oracle环境变量是否被正确设置；
2.检查ORACLE实例是否在此节点正常启动，重新设置ORACLE_HOME；
3.检查Oracle启动是否正常，如果正常，检查listener的状态；
4.查看ORACLE的trace文件，以寻找对应的报错信息，并进行相应的排错；
5.如果以上排错还是不能解决问题，可以咨询oracle的官方技术支持团队来解决此问题。
