[#LU-9066] ior ERROR: read() failed, Input/output error; client was evicted after OST failover

bluepill-client03: IOR-3.0.1: MPI Coordinated Test of Parallel I/O bluepill-client03: bluepill-client03: Began: Sun Dec 4 18:28:38 2016 bluepill-client03: Command line used: /usr/local/bin/IOR -o /mnt/fs1//ha.sh-111769/bluepill-client03-ior/f.ior -f /test-tools/grev/Cray/2016_snx2k_fvt.ior.shared_file.p ... bluepill-client03: clients = 88 (8 per node) ... bluepill-client03: Commencing read performance test: Mon Dec 5 02:34:58 2016 bluepill-client03: ior ERROR: read() failed, errno 5, Input/output error (aiori-POSIX.c:250)

Sorry, I cannot imagine how this message can be printed with the https://review.whamcloud.com/23921/ applied. The logic of ldlm_handle_ast_error() with such patch is as following:

static int ldlm_handle_ast_error(struct ldlm_lock *lock,
                                 struct ptlrpc_request *req, int rc,
                                 const char *ast_type)
{
...
                } else if (rc == -ENODEV || rc == -ESHUTDOWN ||
                           (rc == -EIO &&
                            req->rq_import->imp_state == LUSTRE_IMP_CLOSED)) {
                        /* Upon umount process the AST fails because cannot be
                         * sent. This shouldn't lead to the client eviction.
                         * -ENODEV error is returned by ptl_send_rpc() for
                         *  new request in such import.
                         * -SHUTDOWN is returned by ptlrpc_import_delay_req()
                         *  if imp_invalid is set or obd_no_recov.
                         * Meanwhile there is also check for LUSTRE_IMP_CLOSED
                         * in ptlrpc_import_delay_req() as well with -EIO code.
                         * In all such cases errors are ignored.
                         */
                        LDLM_DEBUG(lock, "%s AST can't be sent due to a server"
                                         " %s failure or umount process: rc = %d\n",
                                         ast_type,
                                         req->rq_import->imp_obd->obd_name, rc);
                } else {
                        LDLM_ERROR(lock,
                                   "client (nid %s) %s %s AST (req@%p x%llu status %d rc %d), evict it",
                                   libcfs_nid2str(peer.nid),
                                   req->rq_replied ? "returned error from" :
                                   "failed to reply to",
                                   ast_type, req, req->rq_xid,
                                   (req->rq_repmsg != NULL) ?
                                   lustre_msg_get_status(req->rq_repmsg) : 0,
                                   rc);
                        ldlm_failed_ast(lock, rc, ast_type);
                }
                return rc;
...
}

Please note that when the "rc == -19 (ENODEV)", if will goto the branch LDLM_DEBUG(), but not the branch ldlm_failed_ast(). Please correct me if I missed anything.

[LU-9066] ior ERROR: read() failed, Input/output error; client was evicted after OST failover Created: 31/Jan/17 Updated: 14/Jun/17 Resolved: 23/Mar/17
Status:	Closed
Project:	Lustre
Component/s:	None
Affects Version/s:	Lustre 2.9.0, Lustre 2.10.0
Fix Version/s:	Lustre 2.10.0

[LU-9066] ior ERROR: read() failed, Input/output error; client was evicted after OST failover Created: 31/Jan/17 Updated: 14/Jun/17 Resolved: 23/Mar/17