Start of HostService failed (Connection of channel 'x' failed)

You try to bring up the SAP Host Agent but, it keeps failing. From the dev_saphostexec trace file (in /usr/sap/hostctrl/work directory), you found below the error message,

ERROR => Connection of channel 9 failed [ServerChanne 67]
ERROR => Connection of channel 10 failed [ServerChanne 67]
ERROR => Setup of too many communication channels failed. Giving up.
ERROR => Channel Accept failed [HostExecServ 450]
ERROR => Start of HostService failed

Solution

Find the old “orphaned” Host Agent process and kill it,

# ps -ef | grep hostctrl

# kill -9 [process-id]

Start the SAP Host Agent.

 /usr/sap/hostctrl/exe/saphostexec -restart

If it’s still failing, check all the permission and free space of your SAP Host Agent and redo the above steps.

Note

Ensure the /tmp directory is writable for the sapadm user and the filesystem has free space left.

Make sure that permission of /tmp/.sapstartsrv99_sapstartsrv.log file is correct. You can delete the below file and it will regenerate after the SAP Host Agent restart.

-rw-rw-rw- sapadm sapsys .sapstartsrv99_sapstartsrv.log

Ensure the host_profile file from /usr/sap/hostctrl/exe/ is maintained with below permission,

    -rw-r----- 1 root sapsys 392 June 5 12:11 host_profile

[If the above steps didn’t work out] We suggest you re-install the SAP Host Agent. It will only take minutes, better than spending hours of troubleshooting. You can refer to the Steps to Install SAP Host Agent