Hi, Occasionally, operations on a file or directory like "ls -l" fails with "permission denied". When this happens I see the following error messages in the client logs: LustreError: 23545:0:(mdc_locks.c:420:mdc_enqueue()) ldlm_cli_enqueue: -2 LustreError: 23545:0:(mdc_locks.c:420:mdc_enqueue()) Skipped 1166 previous similar messages LustreError: 23546:0:(file.c:299:ll_intent_file_open()) lock enqueue: err: -13 LustreError: 23547:0:(file.c:299:ll_intent_file_open()) lock enqueue: err: -13 LustreError: 23559:0:(file.c:299:ll_intent_file_open()) lock enqueue: err: -13 LustreError: 23560:0:(file.c:299:ll_intent_file_open()) lock enqueue: err: -13 LustreError: 23562:0:(file.c:299:ll_intent_file_open()) lock enqueue: err: -13 LustreError: 23562:0:(file.c:299:ll_intent_file_open()) Skipped 1 previous similar message LustreError: 24839:0:(mdc_locks.c:420:mdc_enqueue()) ldlm_cli_enqueue: -2 LustreError: 24839:0:(mdc_locks.c:420:mdc_enqueue()) Skipped 179 previous similar messages LustreError: 24849:0:(file.c:299:ll_intent_file_open()) lock enqueue: err: -13 LustreError: 24853:0:(file.c:299:ll_intent_file_open()) lock enqueue: err: -13 LustreError: 24853:0:(file.c:299:ll_intent_file_open()) Skipped 1 previous similar message LustreError: 28589:0:(mdc_locks.c:420:mdc_enqueue()) ldlm_cli_enqueue: -2 LustreError: 28589:0:(mdc_locks.c:420:mdc_enqueue()) Skipped 186 previous similar messages The lustre version is 1.6.2, the OS Scientific Linux 5.0. Any help would be appreciated. Regards, Hans Schnitzer -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 5737 bytes Desc: S/MIME Cryptographic Signature Url : http://lists.lustre.org/pipermail/lustre-discuss/attachments/20071010/7a8b0315/attachment-0002.bin