问题描述：
1.导致节点异常关闭的原因：
ORA-15064: communication failure with ASM instance
ORA-03113: end-of-file on communication channel
硬件连接设备的问题，后已解决。
2.启动实例alert日志：
略……
ARC1: Archival started
ARC2: Archival started
ARC1: Becoming the 'no FAL' ARCH
ARC1: Becoming the 'no SRL' ARCH
ARC2: Becoming the heartbeat ARCH
Errors in file /home/oracle/app/diag/rdbms/tkoa/tkoa1/trace/tkoa1_ora_26726.trc (incident=192311):
ORA-00600: internal error code, arguments: [2702], [1], [1], [10], [], [], [], [], [], [], [], []
Incident details in: /home/oracle/app/diag/rdbms/tkoa/tkoa1/incident/incdir_192311/tkoa1_ora_26726_i192311.trc
Fri Nov 30 23:54:35 2018
Dumping diagnostic data in directory=[cdmp_20181130235435], requested by (instance=1, osid=26726), summary=[incident=192311].
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Errors in file /home/oracle/app/diag/rdbms/tkoa/tkoa1/trace/tkoa1_ora_26726.trc:
ORA-00600: internal error code, arguments: [2702], [1], [1], [10], [], [], [], [], [], [], [], []
ORA-600 signalled during: ALTER DATABASE OPEN…
ARC3: Archival started
ARC0: STARTING ARCH PROCESSES COMPLETE
Shutting down instance (immediate)
3.其它信息：
trc文件中没有其它明显报错信息；集群状态正常，2节点正常运行。
4.个人当前怀疑是undo 和 redo 存在问题，但仅仅是怀疑，等待解决方案，后续更新。
