I'm facing the same problem, attaching additional log (maybe it helps) May 27 07:47:05 oldcompute02 kernel: [ 1168.239065] ------------[ cut here ]------------ May 27 07:47:05 oldcompute02 kernel: [ 1168.239077] WARNING: CPU: 24 PID: 12116 at /build/linux-lts-xenial-7RlTta/linux-lts- xenial-4.4.0/fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x80() May 27 07:47:05 oldcompute02 kernel: [ 1168.239080] sysfs: cannot create duplicate filename '/bus/scsi/devices/11:0:0:0' May 27 07:47:05 oldcompute02 kernel: [ 1168.239082] Modules linked in: vhost_net vhost macvtap macvlan veth xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables scsi_dh_alua dm_round_robin ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi dm_multipath vport_vxlan openvswitch nf_defrag_ipv6 nf_conntrack bonding binfmt_misc x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm ipmi_ssif ipmi_devintf irqbypass crct10dif_pclmul crc32_pclmul aesni_intel dcdbas input_leds joydev cdc_ether usbnet mii aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd acpi_power_meter acpi_pad ipmi_si ipmi_msghandler 8250_fintek mei_me mei wmi sb_edac shpchp edac_core lpc_ich mac_hid lp parport hid_generic bnx2x vxlan ip6_udp_tunnel ahci usbhid udp_tunnel ptp hid libahci pps_core megaraid_sas mdio libcrc32c fjes May 27 07:47:05 oldcompute02 kernel: [ 1168.239182] CPU: 24 PID: 12116 Comm: iscsiadm Tainted: G W 4.4.0-22-generic #40~14.04.1-Ubuntu May 27 07:47:05 oldcompute02 kernel: [ 1168.239185] Hardware name: Dell Inc. PowerEdge M620/06GTV1, BIOS 2.5.4 01/27/2016 May 27 07:47:05 oldcompute02 kernel: [ 1168.239188] 0000000000000000 ffff881fe34eb9e8 ffffffff813cde6c ffff881fe34eba30 May 27 07:47:05 oldcompute02 kernel: [ 1168.239192] ffffffff81ada130 ffff881fe34eba20 ffffffff8107d856 ffff881fe5c2d000 May 27 07:47:05 oldcompute02 kernel: [ 1168.239196] ffff881fef80b350 ffff883ff1802870 0000000000000001 ffffffffffffffef May 27 07:47:05 oldcompute02 kernel: [ 1168.239200] Call Trace: May 27 07:47:05 oldcompute02 kernel: [ 1168.239209] [<ffffffff813cde6c>] dump_stack+0x63/0x87 May 27 07:47:05 oldcompute02 kernel: [ 1168.239216] [<ffffffff8107d856>] warn_slowpath_common+0x86/0xc0 May 27 07:47:05 oldcompute02 kernel: [ 1168.239221] [<ffffffff8107d8dc>] warn_slowpath_fmt+0x4c/0x50 May 27 07:47:05 oldcompute02 kernel: [ 1168.239225] [<ffffffff8127a694>] sysfs_warn_dup+0x64/0x80 May 27 07:47:05 oldcompute02 kernel: [ 1168.239230] [<ffffffff8127aa2a>] sysfs_do_create_link_sd.isra.2+0xaa/0xb0 May 27 07:47:05 oldcompute02 kernel: [ 1168.239234] [<ffffffff8127aa55>] sysfs_create_link+0x25/0x40 May 27 07:47:05 oldcompute02 kernel: [ 1168.239242] [<ffffffff8152408b>] bus_add_device+0x10b/0x1f0 May 27 07:47:05 oldcompute02 kernel: [ 1168.239247] [<ffffffff81521fe5>] device_add+0x3b5/0x610 May 27 07:47:05 oldcompute02 kernel: [ 1168.239252] [<ffffffff8158d165>] scsi_sysfs_add_sdev+0xa5/0x290 May 27 07:47:05 oldcompute02 kernel: [ 1168.239258] [<ffffffff8158a6e5>] scsi_probe_and_add_lun+0xb65/0xd80 May 27 07:47:05 oldcompute02 kernel: [ 1168.239266] [<ffffffff8153077c>] ? __pm_runtime_resume+0x5c/0x70 May 27 07:47:05 oldcompute02 kernel: [ 1168.239271] [<ffffffff8158b0d2>] __scsi_scan_target+0xd2/0x230 May 27 07:47:05 oldcompute02 kernel: [ 1168.239276] [<ffffffff8158b307>] scsi_scan_target+0xd7/0xf0 May 27 07:47:05 oldcompute02 kernel: [ 1168.239293] [<ffffffffc03fc9d5>] iscsi_user_scan_session.part.14+0x105/0x140 [scsi_transport_iscsi] May 27 07:47:05 oldcompute02 kernel: [ 1168.239303] [<ffffffffc03fca10>] ? iscsi_user_scan_session.part.14+0x140/0x140 [scsi_transport_iscsi] May 27 07:47:05 oldcompute02 kernel: [ 1168.239313] [<ffffffffc03fca2e>] iscsi_user_scan_session+0x1e/0x30 [scsi_transport_iscsi] May 27 07:47:05 oldcompute02 kernel: [ 1168.239318] [<ffffffff81520503>] device_for_each_child+0x43/0x70 May 27 07:47:05 oldcompute02 kernel: [ 1168.239328] [<ffffffffc03fa82e>] iscsi_user_scan+0x2e/0x30 [scsi_transport_iscsi] May 27 07:47:05 oldcompute02 kernel: [ 1168.239331] [<ffffffff8158cf26>] store_scan+0xa6/0x100 May 27 07:47:05 oldcompute02 kernel: [ 1168.239338] [<ffffffff81002d29>] ? calibrate_delay+0x5b9/0x607 May 27 07:47:05 oldcompute02 kernel: [ 1168.239346] [<ffffffff811dcc06>] ? __kmalloc+0x1d6/0x270 May 27 07:47:05 oldcompute02 kernel: [ 1168.239350] [<ffffffff8151fd38>] dev_attr_store+0x18/0x30 May 27 07:47:05 oldcompute02 kernel: [ 1168.239354] [<ffffffff81279dba>] sysfs_kf_write+0x3a/0x50 May 27 07:47:05 oldcompute02 kernel: [ 1168.239358] [<ffffffff81279450>] kernfs_fop_write+0x120/0x170 May 27 07:47:05 oldcompute02 kernel: [ 1168.239364] [<ffffffff811fd498>] __vfs_write+0x18/0x40 May 27 07:47:05 oldcompute02 kernel: [ 1168.239367] [<ffffffff811fdab2>] vfs_write+0xa2/0x1a0 May 27 07:47:05 oldcompute02 kernel: [ 1168.239371] [<ffffffff811fcbf8>] ? do_sys_open+0x1b8/0x270 May 27 07:47:05 oldcompute02 kernel: [ 1168.239375] [<ffffffff811fe7d6>] SyS_write+0x46/0xa0 May 27 07:47:05 oldcompute02 kernel: [ 1168.239382] [<ffffffff817efcf6>] entry_SYSCALL_64_fastpath+0x16/0x75 May 27 07:47:05 oldcompute02 kernel: [ 1168.239386] ---[ end trace a628d295136d7a5b ]- -- May 27 07:47:05 oldcompute02 kernel: [ 1168.239432] scsi 11:0:0:0: failed to add device: -17 ...skipping... May 27 07:46:49 oldcompute02 kernel: [ 1152.208561] [<ffffffff817efcf6>] entry_SYSCALL_64_fastpath+0x16/0x75 May 27 07:46:49 oldcompute02 kernel: [ 1152.208595] ---[ end trace a628d295136d7a5a ]- --
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