I have straced the cmsd process with successful one and not: Successful one looks like: [pid 294823] <... recvfrom resumed> "\377/\0\0\n\0\0\207", 8, MSG_WAITALL, NULL, NULL) = 8 [pid 294823] recvfrom(21, "\0\1\0\240\0\0\0\10\0y/store/mc/SAM/GenericT"..., 135, MSG_WAITALL, NULL, NULL) = 135 [pid 294823] futex(0x64b1b8, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 300419] <... futex resumed> ) = 0 [pid 294823] recvfrom(21, <unfinished ...> [pid 300419] stat("/cms/data/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/A64CCCF2-5C76-E711-B359-0CC47A78A3F8.root", {st_mode=S_IFREG|0664, st_size=240461986, ...}) = 0 [pid 300419] writev(21, [{"\377/\0\0\2\0\0\27", 8}, {"\0\0\4Fcmsio10.rc.ufl.edu\0", 23}], 2) = 31 [pid 300419] futex(0x64b1b8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...> [pid 294827] <... nanosleep resumed> 0x7f8093e46d60) = 0 Unsuccessful one has two types of strace outputs: [pid 335099] nanosleep({1, 0}, <unfinished ...> [pid 335110] <... recvfrom resumed> "\377\37\0\0\n\0\0\215", 8, MSG_WAITALL, NULL, NULL) = 8 [pid 335110] recvfrom(22, "\0\1\0\240\0\0\0\10\0\177/store/mc/SAM/GenericT"..., 141, MSG_WAITALL, NULL, NULL) = 141 [pid 335110] futex(0x64b1b8, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 336772] <... futex resumed> ) = 0 [pid 335110] recvfrom(22, <unfinished ...> [pid 336772] mmap(NULL, 134217728, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x7fb378000000 [pid 336772] munmap(0x7fb37c000000, 67108864) = 0 [pid 336772] mprotect(0x7fb378000000, 135168, PROT_READ|PROT_WRITE) = 0 [pid 336772] stat("/cms/data/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/CE860B10-5D76-E711-BCA8-FA163EAA761A_cmsuf.root", 0x7fb3979f3950) = -1 EACCES (Permission denied) [pid 336772] stat("/cms/data/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0 [pid 336772] writev(22, [{"\377\37\0\0\1\0\0000", 8}, {"\0\0\0\1Unable to access file; file "..., 48}], 2) = 56 [pid 336772] futex(0x64b1b8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...> [pid 335099] <... nanosleep resumed> 0x7fb39d6bed60) = 0 [pid 335099] nanosleep({1, 0}, <unfinished ...> [pid 335110] <... recvfrom resumed> "\377+\0\0\n\0\0\215", 8, MSG_WAITALL, NULL, NULL) = 8 [pid 335110] recvfrom(22, "\0\1\0\240\0\0\0\10\0\177/store/mc/SAM/GenericT"..., 141, MSG_WAITALL, NULL, NULL) = 141 [pid 335110] futex(0x64b1b8, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 336772] <... futex resumed> ) = 0 [pid 335110] recvfrom(22, <unfinished ...> [pid 336772] writev(22, [{"\377+\0\0\1\0\0000", 8}, {"\0\0\0\1Unable to access file; file "..., 48}], 2) = 56 [pid 336772] futex(0x64b1b8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...> [pid 335099] <... nanosleep resumed> 0x7fb39d6bed60) = 0 [pid 335099] nanosleep({1, 0}, 0x7fb39d6bed60) = 0 -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1098#issuecomment-564238033 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1