[LU-15195] IOR SSF: ior ERROR: write() failed, errno 11, Resource temporarily unavailable (aiori-POSIX.c:535)

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.15.0
• Severity: 3
• Assignee: Vitaly Fertman
• Reporter: Vitaly Fertman

Description

bluepill-client09: Commencing write performance test: Thu Aug 5 09:35:24 2021
bluepill-client09: ior ERROR: write(15, 0x7f4e2e015000, 1705984) failed, errno 11, Resource temporarily unavailable (aiori-POSIX.c:535)
bluepill-client09: application called MPI_Abort(MPI_COMM_WORLD, -1) - process 2
bluepill-client09: ior ERROR: write(17, 0x7f8026d57000, 1705984) failed, errno 11, Resource temporarily unavailable (aiori-POSIX.c:535)
bluepill-client09: application called MPI_Abort(MPI_COMM_WORLD, -1) - process 6
pdsh@bluepill-client02: bluepill-client09: ssh exited with exit code 255
pdsh@bluepill-client02: bluepill-client02: ssh exited with exit code 1

EAGAIN comes from ofd_lvbo_init():

		/* Object could be recreated during the first
		 * CLEANUP_ORPHAN request. */
		if (rc == -ENOENT) {
			seq = fid_seq(&info->fti_fid);
			oseq = ofd_seq_load(env, ofd, fid_seq_is_idif(seq) ?
					    FID_SEQ_OST_MDT0 : seq);
			if (!IS_ERR_OR_NULL(oseq)) {
				if (!oseq->os_last_id_synced)
					rc = -EAGAIN;
				ofd_seq_put(env, oseq);
			}
		}

the code was added in LU-11765 which sent EAGAIN instead of ENOENT expecting EAGAIN led to a resend. it happens indeed for enqueue due to (a hack?) cl_glimpse_size0(), but not for others.