Comment 2 for bug 1619101

Actually, this error is also observed in the log, which makes bug 1589761 related

2016-08-31 07:51:46.247 9430 ERROR dragonflow.controller.ryu_base_app [-] OFPErrorMsg received: type=0x04 code=0x08 message=0x04 0x0e 0x00 0x68 0xc3 0xf7 0x46 0x21 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x4d 0x00 0x00 0x00 0x00 0x00 0xff 0xfe 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0x00 0x00 0x00 0x00 0x00 0x01 0x00 0x16 0x00 0x01 0xd3 0x08 0x00 0x00 0x00 0x25 0x00 0x00 0x00 0x35
2016-08-31 07:51:46.248 9430 DEBUG RyuDFAdapter [-] EventOFPErrorMsg received.
version=0x4, msg_type=0x1, msg_len=0x4c, xid=0xc3f74621
 `-- msg_type: OFPT_ERROR(1)
OFPErrorMsg(type=0x4, code=0x8, data=b'\x04\x0e\x00\x68\xc3\xf7\x46\x21\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x4d\x00\x00\x00\x00\x00\xff\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x01\x00\x16\x00\x01\xd3\x08\x00\x00\x00\x25\x00\x00\x00\x35')
 |-- type: OFPET_BAD_MATCH(4)
 |-- code: OFPBMC_BAD_MASK(8) error_msg_handler /usr/local/lib/python2.7/dist-packages/ryu/controller/ofp_handler.py:282