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A bug of the Linux kernel causes the host restarts, closes failed while there are services being on

Publication Date:  2012-11-05 Views:  30 Downloads:  0
Issue Description
•S5500T V100R001 V100R002
•S5600T V100R001 V100R002
•S5800T V100R001 V100R002
•S6800T V100R001 V100R002
The operating system of the application server: Sles 10 SP3 x86
Connection mode: iSCSI
The fault recurrence steps:
1. When there are services being on, execute the command “suse11-sp1-os: # shutdown -r now” in the host’s command line, the host close failed, which showed as powering off and holding.
2. The logs of the host reports: Kernel BUG at fs/jfs/super.c:119.
Alarm Information
None
Handling Process
Plug out/ in the power supply of the host, power on again and restart.
Root Cause
The logs about the host closing failed:
Kernel BUG at fs/jfs/super.c:119




From the above figure, we can see that the system will delete the mounted device when closing the host, however, if there is a service being accessing this mounted device, the unloading failed will cause the host closing failed, which shows as the powering off flow has stopped, this phenomena belongs to the Linux kernel bug of the host system .
Suggestions
Make sure to comply with the operation criterion when executing the “shutdown” operation, the correct order is: close the service firstly, and then execute “shutdown” to close the host.

END