2013-08-29T22:44:08.536Z cpu21:4117)<3>nx_nic[vmnic6]: NIC Link is down
2013-08-29T22:44:10.551Z cpu18:4114)<3>nx_nic[vmnic6]: NIC Link is up
2013-08-29T22:44:10.996Z cpu9:4147)NetPort: 1426: disabled port 0x3000003
2013-08-29T22:44:17.015Z cpu14:4800)WARNING: iscsi_vmk: iscsivmk_StopConnection: vmhba37:CH:1 T:3 CN:0: iSCSI connection is being marked "OFFLINE" (Event:4)
2013-08-29T22:44:17.015Z cpu14:4800)WARNING: iscsi_vmk: iscsivmk_StopConnection: Sess [ISID: 00023d000002 TARGET: iqn.2003-10.com.lefthandnetworks:exbensanmgmt:65:web-max-rpl TPGT: 1 TSIH: 0]
2013-08-29T22:44:17.015Z cpu14:4800)WARNING: iscsi_vmk: iscsivmk_StopConnection: Conn [CID: 0 L: 10.1.191.32:60856 R: 10.1.191.12:3260]
2013-08-29T22:44:17.016Z cpu14:4800)WARNING: iscsi_vmk: iscsivmk_StopConnection: vmhba37:CH:1 T:0 CN:0: iSCSI connection is being marked "OFFLINE" (Event:4)
2013-08-29T22:44:17.016Z cpu14:4800)WARNING: iscsi_vmk: iscsivmk_StopConnection: Sess [ISID: 00023d000002 TARGET: iqn.2003-10.com.lefthandnetworks:exbensanmgmt:28:lun02 TPGT: 1 TSIH: 0]
2013-08-29T22:44:17.016Z cpu14:4800)WARNING: iscsi_vmk: iscsivmk_StopConnection: Conn [CID: 0 L: 10.1.191.32:55213 R: 10.1.191.12:3260]
2013-08-29T22:44:17.769Z cpu1:4800)WARNING: iscsi_vmk: iscsivmk_StopConnection: vmhba37:CH:1 T:4 CN:0: iSCSI connection is being marked "OFFLINE" (Event:4)
2013-08-29T22:44:17.769Z cpu1:4800)WARNING: iscsi_vmk: iscsivmk_StopConnection: Sess [ISID: 00023d000002 TARGET: iqn.2003-10.com.lefthandnetworks:exbensanmgmt:88:dfs-max-rpl TPGT: 1 TSIH: 0]
013-08-29T22:44:21.085Z cpu5:4800)WARNING: iscsi_vmk: iscsivmk_StartConnection: vmhba37:CH:1 T:4 CN:0: iSCSI connection is being marked "ONLINE"
2013-08-29T22:44:21.085Z cpu5:4800)WARNING: iscsi_vmk: iscsivmk_StartConnection: Sess [ISID: 00023d000002 TARGET: iqn.2003-10.com.lefthandnetworks:exbensanmgmt:88:dfs-max-rpl TPGT: 1 TSIH: 0]
2013-08-30T00:21:20.300Z cpu1:9973344)NMP: nmp_ThrottleLogForDevice:2318: Cmd 0x1a (0x412400a95000) to dev "mpx.vmhba0:C0:T0:L0" on path "vmhba0:C0:T0:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x20 0x0.Act:NONE
2013-08-30T00:21:20.300Z cpu1:9973344)ScsiDeviceIO: 2316: Cmd(0x412400a95000) 0x1a, CmdSN 0x10a79c to dev "mpx.vmhba0:C0:T0:L0" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x20 0x0.
Sense codes:
H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x20 0x0
* The device is at a check condition, meaning it is not able to process the given command.
Situation :
The ISCSI connection failure caused the Host's to lose the paths for the data stores and since the Host still continued to Send I/O requests even after the data store was lost
causing the Hostd service to become too busy or crashed down. This situation is something very similar to APD.
Check this link :