SRX 3600 reth port issue

May 2 13:28:59 NB1_SRX_Node0 rpd[1312]: Decode ifd ge-15/0/4 index 181: ifdm_flags 0xc001
May 2 13:28:59 NB1_SRX_Node0 rpd[1312]: krt_inherit_ifd_aps_flags ge-15/0/4 index 181: <> from self
May 2 13:28:59 NB1_SRX_Node0 rpd[1312]: EVENT ge-15/0/4.0 index 2684275464 address #0 0.10.db.ff.10.5
May 2 13:28:59 NB1_SRX_Node0 rpd[1312]: EVENT ge-15/0/4 index 181 address #0 0.10.db.ff.10.5
May 2 13:28:59 NB1_SRX_Node0 mib2d[1340]: SNMP_TRAP_LINK_DOWN: ifIndex 552, ifAdminStatus up(1), ifOperStatus down(2), ifName
ge-15/0/4
May 2 13:29:20 NB1_SRX_Node0 rpd[1312]: Decode ifd ge-15/0/4 index 181: ifdm_flags 0xc000
May 2 13:29:20 NB1_SRX_Node0 rpd[1312]: krt_inherit_ifd_aps_flags ge-15/0/4 index 181: <> from self
May 2 13:29:20 NB1_SRX_Node0 rpd[1312]: EVENT ge-15/0/4.0 index 2684275464 address #0 0.10.db.ff.10.5
May 2 13:29:20 NB1_SRX_Node0 rpd[1312]: EVENT ge-15/0/4 index 181 address #0 0.10.db.ff.10.5
May 2 13:29:20 NB1_SRX_Node0 mib2d[1340]: SNMP_TRAP_LINK_UP: ifIndex 552, ifAdminStatus up(1), ifOperStatus up(1), ifName ge-15/0/4
May 2 13:29:20 NB1_SRX_Node0 mib2d[1340]: SNMP_TRAP_LINK_UP: ifIndex 638, ifAdminStatus up(1), ifOperStatus up(1), ifName

Can you suggest the reason why the interface was down looking on the below logs