ACSLS - ACSLS Is Not Responding - cmd_proc is Hung; event log shows chkloc.sh WARNING errorrs (Doc ID 1427512.1)

Last updated on OCTOBER 24, 2014

Applies to:

Sun StorageTek Auto Cartridge Sys Lib SW (ACSLS) - Version 7.0 to 8.3 [Release 7.0 to 8.0]
Information in this document applies to any platform.

Symptoms

1. cmd_proc is slowing down or is hung. However, ACSLM continues to process acsapi requests from the client application.

2. Error messages on the acsss_event.log
-----
2012-02-23 06:40:01 chkloc.sh: WARNING
Exclusive Lock held by .

2012-02-23 07:20:01 chkloc.sh: WARNING

Exclusive Lock held by .

2012-02-23 07:20:01 chkloc.sh: WARNING

Exclusive Lock held by .

2012-02-23 07:25:01 chkloc.sh: WARNING

Exclusive Lock held by for over 10 minutes!

2012-02-23 07:25:02 chkloc.sh: WARNING

Exclusive Lock held by .

2012-02-23 07:25:02 chkloc.sh: WARNING

Exclusive Lock held by for over 10 minutes!
296
----

3. 'ipcs -a' output shows a lot of Patrol shared memory segments and semaphores allocated:
---
IPC status from <running system> as of Fri Feb 24 06:51:00 PST 2012
T ID KEY MODE OWNER GROUP CREATOR CGROUP CBYTES QNUM QBYTES LSPID LRPID STIME RTIME CTIME
Message Queues:
T ID KEY MODE OWNER GROUP CREATOR CGROUP NATTCH SEGSZ CPID LPID ATIME DTIME CTIME
Shared Memory:
m 1124073581 0x41ca2ea6 --rw-rw-rw- patrol patrol patrol patrol 0 2816 6584 9251 6:50:45 6:50:45 3:38:34
m 1124073580 0x52e6a9 --rw------- acsdb acsdb acsdb acsdb 2 18817024 20003 22407 0:00:40 6:50:46 0:00:40
m 1124073579 0x41ca2eec --rw-rw-rw- patrol patrol patrol patrol 0 256 6584 9251 6:50:55 6:50:55 21:00:05
m 1124073578 0x41ca2eea --rw-rw-rw- patrol patrol patrol patrol 0 768 6584 9251 6:50:55 6:50:55 21:00:05
m 1124073576 0x41ca2ee9 --rw-rw-rw- patrol patrol patrol patrol 0 256 6584 9251 6:45:15 6:45:15 21:00:05
m 1124073575 0x41ca2ee8 --rw-rw-rw- patrol patrol patrol patrol 0 256 6584 9251 6:45:15 6:45:15 21:00:05
m 1124073574 0x41ca2ee7 --rw-rw-rw- patrol patrol patrol patrol 0 768 6584 9251 6:50:55 6:50:55 21:00:05
m 1124073572 0x41ca2ee6 --rw-rw-rw- patrol patrol patrol patrol 0 2304 6584 9251 6:45:15 6:45:15 21:00:04
m 1124073567 0x41ca2ee5 --rw-rw-rw- patrol patrol patrol patrol 0 768 6584 9251 6:50:45 6:50:45 21:00:04
...
....
m 201326644 0x41ca2e7e --rw-rw-rw- patrol patrol patrol patrol 0 3328 6584 9251 6:50:55 6:50:55 20:06:44
m 201326636 0x41ca2e7c --rw-rw-rw- patrol patrol patrol patrol 0 256 6584 9251 6:50:55 6:50:55 20:06:34
m 38 0x41ca2e7b --rw-rw-rw- patrol patrol patrol patrol 0 5376 6584 9251 6:50:55 6:50:55 11:40:42
m 15 0x41ca2e6e --rw-rw-rw- patrol patrol patrol patrol 0 768 6584 9251 6:50:55 6:50:55 11:40:32
m 11 0x1ca2e6d --rw-rw-rw- patrol patrol patrol patrol 0 2296 4685 9251 6:50:51 6:50:51 11:40:32
m 0 0x5500078c --rw-r--r-- root root root root 1 120064 66 600 11:37:19 11:37:35 11:37:19
T ID KEY MODE OWNER GROUP CREATOR CGROUP NSEMS OTIME CTIME
Semaphores:
...
s 956301326 0xc1ca2ea3 --ra-ra-ra- patrol patrol patrol patrol 2 6:50:55 21:00:04
s 956301325 0xc1ca2eec --ra-ra-ra- patrol patrol patrol patrol 2 6:50:55 21:00:00
s 973078539 0xc1ca2eea --ra-ra-ra- patrol patrol patrol patrol 2 6:50:55 21:00:00
s 973078534 0xc1ca2ee9 --ra-ra-ra- patrol patrol patrol patrol 2 6:45:15 21:00:00
s 973078533 0xc1ca2ee8 --ra-ra-ra- patrol patrol patrol patrol 2 6:45:15 21:00:00
...
s 10 0x82ca2de9 --ra-ra-ra- patrol patrol patrol patrol 2 6:50:54 11:40:32
s 9 0x41268013 --ra-ra-r-- acsss staff acsss

Changes

No known changes

Cause

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