Check_MK Werk 4956: Fixed possible exception in cmc.log when working with piggyback data

ID: 4956 Title: Fixed possible exception in cmc.log when working with piggyback data Component: Core & setup Level: 1 Class: Bug fix Version: 1.5.0i1 When monitoring hosts using piggyback data an exception could occur when a host is checked by different processes at the same time. This could happen e.g. when the running core updates the piggyback data while a manual "check_mk -nv [hostname]" call also tries to update this data. The fixed exception looks like this in cmc.log: C+: 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> Traceback (most recent call last): 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> File "/omd/sites/master/share/check_mk/modules/keepalive.py", line 118, in do_keepalive 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> status = command_function(command_tuple) 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> File "/omd/sites/master/share/check_mk/modules/keepalive.py", line 464, in execute_keepalive_command 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> return mode_function(hostname, ipaddress) 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> File "/omd/sites/master/share/check_mk/modules/check_mk_base.py", line 1242, in do_check 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> do_all_checks_on_host(hostname, ipaddress, only_check_types) 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> File "/omd/sites/master/share/check_mk/modules/check_mk_base.py", line 1526, in do_all_checks_on_host 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> res = execute_check(checkname, item, params, description, aggrname, address) 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> File "/omd/sites/master/share/check_mk/modules/check_mk_base.py", line 1415, in execute_check 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> info = get_info_for_check(hostname, ipaddress, infotype) 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> File "/omd/sites/master/share/check_mk/modules/check_mk_base.py", line 224, in get_info_for_check 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> info = apply_parse_function(get_host_info(hostname, ipaddress, section_name, max_cachefile_age, ignore_check_interval), section_name) 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> File "/omd/sites/master/share/check_mk/modules/check_mk_base.py", line 317, in get_host_info 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> ignore_check_interval) 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> File "/omd/sites/master/share/check_mk/modules/check_mk_base.py", line 461, in get_realhost_info 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> store_piggyback_info(hostname, piggybacked) 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> File "/omd/sites/master/share/check_mk/modules/check_mk_base.py", line 598, in store_piggyback_info 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> os.rename(dir + "/.new." + sourcehost, dir + "/" + sourcehost) 2017-07-03 19:39:04 [4] [Check_MK helper 2835] >> OSError: [Errno 2] No such file or directory C-: