節點重配置後IPC傳送超時問題

客戶RAC環境在一個節點重啟後，另一個節點出現IPC send timeout資訊。

詳細錯誤資訊為：

Wed May 2 22:07:00 2012
IPC Send timeout detected.Sender: ospid 20808
Receiver: inst 1 binc 1718095761 ospid 16263
Wed May 2 22:07:02 2012
IPC Send timeout detected.Sender: ospid 6677
Receiver: inst 1 binc 1718095761 ospid 16263
Wed May 2 22:07:09 2012
IPC Send timeout detected.Sender: ospid 16758
Receiver: inst 1 binc 1718096035 ospid 16261
Wed May 2 22:07:13 2012
IPC Send timeout detected.Sender: ospid 8947
Receiver: inst 1 binc 1718095761 ospid 16263
Wed May 2 22:07:13 2012
IPC Send timeout detected.Sender: ospid 6583
Receiver: inst 1 binc 1718095761 ospid 16263
Wed May 2 22:07:31 2012
IPC Send timeout to 0.0 inc 24 for msg type 12 from opid 132
Wed May 2 22:07:31 2012
IPC Send timeout detected.Sender: ospid 17068
Receiver: inst 1 binc 1718095761 ospid 16263
Wed May 2 22:07:34 2012
Communications reconfiguration: instance_number 1
Wed May 2 22:07:34 2012
IPC Send timeout to 0.0 inc 24 for msg type 12 from opid 154
Wed May 2 22:07:45 2012
IPC Send timeout to 0.0 inc 24 for msg type 12 from opid 64
Wed May 2 22:07:45 2012
IPC Send timeout to 0.0 inc 24 for msg type 12 from opid 95
Wed May 2 22:07:54 2012
IPC Send timeout detected.Sender: ospid 21078
Receiver: inst 1 binc 1718095761 ospid 16263
Wed May 2 22:07:59 2012
IPC Send timeout to 0.0 inc 24 for msg type 12 from opid 24
Wed May 2 22:08:04 2012
Trace dumping is performing id=[cdmp_20120502220729]
Wed May 2 22:08:24 2012
IPC Send timeout to 0.0 inc 24 for msg type 12 from opid 146
Wed May 2 22:08:36 2012
Trace dumping is performing id=[cdmp_20120502220805]
Wed May 2 22:08:38 2012
Trace dumping is performing id=[cdmp_20120502220805]
Wed May 2 22:10:55 2012
Evicting instance 1 from cluster
Wed May 2 22:11:32 2012
Waiting for instances to leave:
1

這個資訊並不正常，查詢MOS後發現，這是一個bug，問題描述可以參考：'IPC Send Timeout Detected' errors between QMON Processes after RAC reconfiguration [ID 458912.1]。

對於當前的10.2.0.4環境，需要針對Bug 6200820進行PATCH修正，而對於10.2.0.3版本則需要應用Patch 6326889。

在MOS中查到不少類似IPC Timeout的問題，多數都會影響10.2.0.4版本，且大部分都在10.2.0.5中被fixed，因此如果這個問題出現頻繁，升級到10.2.0.5也是一個不錯的選擇。