[ohasd(18995)]CRS-0715:Oracle High Availability Service has timed out waiting for init.ohasd to be started.

两节点rac

环境：Linux7.6+oracle 11.2.0.4

集群不能随机启动

在日志里发现以下提示：$GRID_HOME/log/hostname/alertrhostname.log

[ohasd(18995)]CRS-0715:Oracle High Availability Service has timed out waiting for init.ohasd to be started.

暂时性解决方法：
打开另外一个会话窗口
more /var/tmp/.oracle/npohasd 或者 tailf -f /var/tmp/.oracle/npohasd

再过会，集群就能起来啦。

方法1：
mos In the relevant root.sh The description document for the execution failure is ：
Install of Clusterware fails while running root.sh on OL7 - ohasd fails to start (Doc ID 1959008.1)
The root cause is linux 7+ The system service management mode has changed from the original init Turned into systemctl,11g r2 By default init To manage , Cause the system to fail to start ohasd service . According to the official statement, it needs to be patched patch 18370031.

方法2：经测试无效
Use root After executing the following statement , Re execution root.sh, Both nodes have to operate
/bin/dd if=/var/tmp/.oracle/npohasd of=/dev/null bs=1024 count=1

The method comes from the Internet , Restart may cause ohasd Boot failure .

方法3：经测试有效
add to ohas.service service , Then run the script root.sh.
Steps are as follows ：
1. With root Users create service files
#touch /usr/lib/systemd/system/ohas.service
#chmod 777 /usr/lib/systemd/system/ohas.service
 
2. Add the following to the newly created ohas.service In file
# cat /usr/lib/systemd/system/ohas.service
[Unit]
Description=Oracle High Availability Services
After=syslog.target
[Service]
ExecStart=/etc/init.d/init.ohasd run >/dev/null 2>&1 Type=simple
Restart=always
[Install]
WantedBy=multi-user.target
 
3. With root The user runs the following command
systemctl daemon-reload
systemctl enable ohas.service
systemctl start ohas.service