This documentation shows how to send dump request to a server which hangs. It 'll help you to analyze the problem.

Oracle Solaris Hardware

From OS command line

#/usr/sbin/reboot -d

Oracle Solaris M-Series Server:

XSCF> reset -d 0 panic

DomainID to panic:00

Continue? [y|n] :y

00 :Panicked

*Note*

This command only issues the instruction to reset.

The result of the instruction can be checked by the "showlogs power".

XSCF> console -d 0 -y

Connect to DomainID 0?[y|n] :y

0:17 100% done

100% done: 86836 pages dumped, dump succeeded

rebooting...

Resetting...

SPARC T5xx0/T3-x/T4-x/T5-x

> set /SYS keyswitch_state=normal

Set ’keyswitch_state’ to ’normal’

-> set /HOST send_break_action=dumpcore

Set 'send_break_action' to 'dumpcore'

-> start /SP/console

Are you sure you want to start /SP/console (y/n)? y

Serial console started.  To stop, type #.

done

dumping to /dev/dsk/c0t5000CCA00AB4C674d0s1, offset 107544576, content: kernel

0:50  100% done

SunFire[TM] T1000/T2000

sc> break -Dyc

SC Alert: SC Request to Dump core host.

Enter #. to return to ALOM.

100% done: 53847 pages dumped, compression ratio 5.54, dump succeeded

rebooting...