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How to troubleshoop flapping ports?

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Below is the output of show log messages on one of my switch stacks. As you can see I have ports flapping quite often.

Does this just mean the device (computer) that is attached to this port is being turned off or on? If not, then how do I troubleshoot flapping ports?

 

I thought it might be a spanning tree issue but spanning tree has not change in a long time as shown by "show spanning-tree bridge"

 

Mar 9 09:59:09 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 587, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-0/0/46
Mar 9 09:59:29 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 587, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-0/0/46
Mar 9 10:01:25 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 672, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-2/0/19
Mar 9 10:02:18 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 672, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-2/0/19
Mar 9 10:06:34 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 671, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-2/0/18
Mar 9 10:07:25 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 671, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-2/0/18
Mar 9 10:08:25 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 594, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-0/0/44
Mar 9 10:08:31 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 594, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-0/0/44
Mar 9 10:09:19 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 594, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-0/0/44
Mar 9 10:12:24 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 556, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-0/0/26
Mar 9 10:12:28 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 556, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-0/0/26
Mar 9 10:18:10 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 504, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-0/0/0
Mar 9 10:18:14 JH142A mib2d[1333]: SNMP_TRAP_LINK_DOWN: ifIndex 504, ifAdminStatus up(1), ifOperStatus down(2), ifName ge-0/0/0


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