ACSLS - Semaphore Errors Cause ACSLS to Hang (Doc ID 1014173.1)

Last updated on JUNE 04, 2013

Applies to:

Sun StorageTek Auto Cartridge Sys Lib SW (ACSLS) - Version 7.0 and later
All Platforms
***Checked for relevance on 09-May-2011***
***Checked for relevance on 04-Jun-2013***


Symptoms

This document describes an ACSLS hang event because of a Sun Explorer bug.


The following semaphore errors are logged in acsss_event.log:

2007-10-08 15:55:02 ACSMON process[0]:
469 N cl_dshm_attach.c 1 163
cl_dshm_attach: Error 5
on call to cl_sem_lock with id 0. Status=STATUS_IPC_FAILURE

2007-10-08 15:55:30 ACSMON process[0]:
525 N dv_get.c 1 549
dv_get: st_do_common_checking: status STATUS_IPC_FAILURE on call to
cl_dshm_attach(reattach) with key=0x410086ef

...

2007-10-19 11:28:36 ACSLH[0]:
469 N cl_dshm_attach.c 1 163
cl_dshm_attach: Error 22
on call to cl_sem_lock with id 0. Status=STATUS_IPC_FAILURE

2007-10-19 11:28:36 ACSLH[0]:
525 N dv_get.c 1 549
dv_get: st_do_common_checking: status STATUS_IPC_FAILURE on call to
cl_dshm_attach(reattach) with key=0x410086ef




The 'ipcs -a' output shows a lot of these semaphore entries:

s 17 0 ----------- root root no-entry 18:32:40 user.root
s 16 0 ----------- root root no-entry 18:32:40 user.root
s 15 0 ----------- root root no-entry 18:32:40 user.root
s 14 0 ----------- root root no-entry 18:32:40 user.root
s 13 0 ----------- root root no-entry 18:32:40 user.root
s 12 0 ----------- root root no-entry 18:32:40 user.root
s 11 0 ----------- root root no-entry 18:32:40 user.root

....
....



Changes

Sun Explorer was run to gather diagnostic logs for the Solaris OS.  A few minutes later, ACSLS started to perform sluggishly and then went into a hang state. 

Cause

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