Why does the iscsi tgtd daemon freeze intermittently in Red Hat Enterprise Linux 5?

Solution Verified - Updated -

Issue

Why does the iscsi tgtd daemon freeze intermittently in Red Hat Enterprise Linux 5 ?

Following error is observed in the log's at the time of freeze

Dec  7 16:17:40 hostname kernel: mptscsih: ioc0: attempting task abort! (sc=ffff810069831b40) 
Dec  7 16:17:40 hostname kernel: mpp 1:0:0:1: 
Dec  7 16:17:40 hostname kernel:         command: Read(10): 28 00 00 6d cb 28 00 00 18 00 
Dec  7 16:17:40 hostname kernel: mptbase: ioc0: LogInfo(0x31140000): Originator={PL}, Code={IO Executed}, SubCode(0x0000) 
Dec  7 16:17:40 hostname kernel: mptscsih: ioc0: task abort: SUCCESS (sc=ffff810069831b40) 
Dec  7 16:18:42 hostname tgtd: abort_task_set(979) found 90000a0b 0 
Dec  7 16:18:42 hostname tgtd: conn_close(88) connection closed 0x8d83c28 2 
Dec  7 16:19:55 hostname tgtd: abort_task_set(979) found a0000a0e 0 
Dec  7 16:19:55 hostname tgtd: conn_close(88) connection closed 0x8c60308 2

Environment

  • Red Hat Enterprise Linux 5
  • Dell MD3000 cabinet using  SAS card (LSI Logic / Symbios Logic SAS1068 PCI-X Fusion-MPT SAS
  • mpp driver for multipathing

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