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Solaris 11.4 can panic with Deadlock: cycle in blocking chain within iscsit code (Doc ID 2583585.1)

Last updated on AUGUST 30, 2019

Applies to:

Solaris Operating System - Version 11.4 to 11.4 [Release 11.0]
Information in this document applies to any platform.

Symptoms

The panic string will be:

Deadlock: cycle in blocking chain

Depending on which of the two threads involved in this deadlock detects the condition the panic stack will either include these functions:

iscsit_cmd_window
iscsit_advance_expcmdsn
iscsit_rxpdu_queue_monitor_session

or these functions:

iscsit_tgt_bind_sess
sess_sm_new_state
sess_sm_q1_free

Cause

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In this Document
Symptoms
Cause
Solution

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