Heartbeat detection is normal, but manual execution reports the following error:
msg：java.lang.RuntimeException: Client-error:No route to host
…
/data/XXL-JOB/16_1498189158000.sh
(No such file or directory)
Cause: There might be a firewall blocking or network issue causing the host to be unreachable.
Solution:
1. Use ping to check host connectivity or telnet to see if the Tomcat port is reachable.
2. Add a firewall exception for port 9999 or temporarily disable the firewall.