客戶在上個月做災備演練完，重啟CICS WLM後，發現其中一個region不斷報如下錯誤：產生大量日誌文 件，最終撐爆文件系統，需要客戶手工不斷刷除日誌文 件：
018-09-09-21:26:45.224+08:00I—– PID#21758128 WARNING rpc cn_pkt cnrcvr.c 2654 0x00001a1b msgID=0x16C9A14F
(receive_packet) assoc->3013e128 BOGUS PACKET TYPE: Protocol version mismatch – major->30 minor->30
2018-09-09-21:26:45.224+08:00I—– PID#21758128 WARNING rpc cn_pkt cnrcvr.c 2675 0x00001a1b msgID=0x16C9A150
(receive_packet) assoc->3013e128 frag_length 13364 in header > fragbuf data size 4352
2018-09-09-21:26:45.232+08:00I—– PID#21758128 WARNING rpc cn_pkt cnrcvr.c 2654 0x00001d1e msgID=0x16C9A14F
(receive_packet) assoc->30139668 BOGUS PACKET TYPE: Protocol version mismatch – major->30 minor->30
2018-09-09-21:26:45.232+08:00I—– PID#21758128 WARNING rpc cn_pkt cnrcvr.c 2675 0x00001d1e msgID=0x16C9A150
(receive_packet) assoc->30139668 frag_length 13364 in header > fragbuf data size 4352
2018-09-09-21:26:45.240+08:00I—– PID#21758128 WARNING rpc cn_pkt cnrcvr.c 2654 0x00000809 msgID=0x16C9A14F
(receive_packet) assoc->30142928 BOGUS PACKET TYPE: Protocol version mismatch – major->30 minor->30
2018-09-09-21:26:45.240+08:00I—– PID#21758128 WARNING rpc cn_pkt cnrcvr.c 2675 0x00000809 msgID=0x16C9A150
(receive_packet) assoc->30142928 frag_length 13364 in header > fragbuf data size 4352
2018-09-09-21:26:45.249+08:00I—– PID#21758128 WARNING rpc cn_pkt cnrcvr.c 2654 0x00001415 msgID=0x16C9A14F
(receive_packet) assoc->30143fe8 BOGUS PACKET TYPE: Protocol version mismatch – major->30 minor->30
2018-09-09-21:26:45.250+08:00I—– PID#21758128 WARNING rpc cn_pkt cnrcvr.c 2675 0x00001415 msgID=0x16C9A150
(receive_packet) assoc->30143fe8 frag_length 13364 in header > fragbuf data size 4352
2018-09-09-21:26:45.259+08:00I—– PID#21758128 WARNING rpc cn_pkt cnrcvr.c 2654 0x00001b1c msgID=0x16C9A14F
(receive_packet) assoc->3013de68 BOGUS PACKET TYPE: Protocol version mismatch – major->30 minor->30
2018-09-09-21:26:45.259+08:00I—– PID#21758128 WARNING rpc cn_pkt cnrcvr.c 2675 0x00001b1c msgID=0x16C9A150
(receive_packet) assoc->3013de68 frag_length 13364 in header > fragbuf data size 4352
最後，終於經過分析，通過手工殺掉進程 ID PID#21758128後，報錯日誌沒有再發生。最終經IBM實驗室，確認為網路錯誤，如下為IBM實驗室回復：
Analyse:
1.Firstly,those error messages were result result of TXSeries receiving
an rpc
packet that was not properly formatted.usually,this is network
configuration issue.
If this is intermittent occurring issue, physical network check up will
be necessary.
This particular warning message does not have any impact on
the functionality of the product and customer can safely ignore the
message.
Advise:
1.Advise cu to check if they have multi net card or multi IP address.
so you also can collect “sarpccp show mapping” and send me for check.
2.If cu have multi IP address, I strongly advise to set RPC_UNSUPPORTED_NETADDRS or
RPC_UNSUPPORTED_NETIFS to restrict RPC to use only one IP address.
3.You also can consider using RPC_RESTRICTED_PORTS to restrict the port
range used by RPC.
4.You also have need to confirm if customer had some network/security
scans that time.
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