Check_MK Werk 4755: Fixed possible error when processing piggyback monitoring data

ID: 4755 Title: Fixed possible error when processing piggyback monitoring data Component: Core & setup Level: 1 Class: Bug fix Version: 1.5.0i1 An error "OSError: [Errno 2] No such file or directory: '/omd/sites/*/tmp/check_mk/piggyback/'" could occur when using piggyback agent data (like it's done when monitoring ESX hosts / vcenters). The error message was visible in the cmc.log and looked like this: 2017-06-06 06:39:36 [4] Check_MK helper [7231]: : >> File "/omd/sites/mysite/share/check_mk/modules/check_mk_base.py", line 371, in get_host_info 2017-06-06 06:39:36 [4] Check_MK helper [7231]: : >> ignore_check_interval=True) 2017-06-06 06:39:36 [4] Check_MK helper [7231]: : >> File "/omd/sites/mysite/share/check_mk/modules/check_mk_base.py", line 506, in get_realhost_info 2017-06-06 06:39:36 [4] Check_MK helper [7231]: : >> piggy_output = get_piggyback_info(hostname) + get_piggyback_info(ipaddress) 2017-06-06 06:39:36 [4] Check_MK helper [7231]: : >> File "/omd/sites/mysite/share/check_mk/modules/check_mk_base.py", line 635, in get_piggyback_info 2017-06-06 06:39:36 [4] Check_MK helper [7231]: : >> for sourcehost, file_path in get_piggyback_files(hostname): 2017-06-06 06:39:36 [4] Check_MK helper [7231]: : >> File "/omd/sites/mysite/share/check_mk/modules/check_mk_base.py", line 612, in get_piggyback_files 2017-06-06 06:39:36 [4] Check_MK helper [7231]: : >> for sourcehost in os.listdir(dir): 2017-06-06 06:39:36 [4] Check_MK helper [7231]: : >> OSError: [Errno 2] No such file or directory: '/omd/sites/mysite/tmp/check_mk/piggyback/backedhost' This was some kind of race condition when one Check_MK helper cleaned up outdated piggyback files while another helper was reading the piggyback data.