rac一个实例重启

bdper

数据库版本：11.2.0.4.160119
OS :HP-UX 11.31

数据库后台出现
Process ID:
Session ID: 3295 Serial number: 121
Errors in file /u01/app/oracle/diag/rdbms/ocdb/ocdb1/trace/ocdb1_asmb_4324.trc:
ORA-15064: communication failure with ASM instance
ORA-03113: end-of-file on communication channel
Process ID:
Session ID: 3295 Serial number: 121
ASMB (ospid: 4324): terminating the instance due to error 15064

实例1于Thu Jul 14 15:40:17发生重启
实例2于Fri Jul 15 09:50发生重启

相关集群，ASM，os，db log都在附件中，还请帮忙看下是否为bug，多谢！