数据库增量备份运行一段时间后时，就会发生集群环境中的一个实例因ora-29740 报错被剔除的事故！惨啊！请大家帮忙看看是什么原因！！alert日志中只报了一个trace文件。如下：

1   1020304 1 2048 384 5 0

Oracle9i Enterprise Edition Release 9.2.0.4.0 - 64bit Production

With the Partitioning, Real Application Clusters, OLAP and Oracle Data Mining options

JServer Release 9.2.0.4.0 - Production

ORACLE_HOME = /oracle/OraHome

System name:        HP-UX

Node name:        yd_db2

Release:        B.11.11

Version:        U

Machine:        9000/800

Instance name: orcl2

Oracle process number: 4

Unix process pid: 4052, image: oracle@yd_db2 (LMON)

418BEF87:00000009     4     0 10280   1 0x0000000000000004

418BF0D1:0000000A     4     0 10401  29 KSXPUNMAP: client 1

418BF0D7:0000000B     4     0 10401  28 KSXPMAP: client 1 base 0xc000000040000000 size 0x8e000000

418BF61A:0000000C     4     3 10429   7 MB SO Al: Allocated MBSO c0000000957d6158

41CD6817:00000030     4     3 10401  40 KSXPICON: submited con request 80000001002db7e8 to tid(1,4,0x93c0080)

41CD681C:00000031     4     3 10401  42 KSXPCNHENT: linking new con 8000000100215090 to tid(1,4,0x93c0080) into cache

41CEF788:00000032     4     3 10401  24 KSXPOPEN: client 5 completed connection 80000001002db7e8 to inst 1 srqh 80000001002db888

41F181C3:00000033     4     3 10427  14 Dest Init: ctx c00000009ffdea60, incarn 13, inst 0, receiver 0, tickets 1000

41F181F2:00000034     4     3 10401  40 KSXPICON: submited con request 8000000100199460 to tid(1,1,0x93c0001)

41F181F4:00000035     4     3 10401  42 KSXPCNHENT: linking new con 80000001002f02d0 to tid(1,1,0x93c0001) into cache

41F181FB:00000036     4     3 10427  14 Dest Init: ctx c00000009ffde730, incarn 13, inst 0, receiver 1, tickets 1000

41F18206:00000037     4     3 10401  40 KSXPICON: submited con request 8000000100199098 to tid(1,2,0x93c000e)

41F18207:00000038     4     3 10401  42 KSXPCNHENT: linking new con 80000001002f3378 to tid(1,2,0x93c000e) into cache

41F1820D:00000039     4     3 10427  14 Dest Init: ctx c00000009ffde400, incarn 13, inst 0, receiver 2, tickets 1000

41F18216:0000003A     4     3 10401  40 KSXPICON: submited con request 800000010017a448 to tid(1,3,0x93c0019)

41F18217:0000003B     4     3 10401  42 KSXPCNHENT: linking new con 80000001002f30f8 to tid(1,3,0x93c0019) into cache

41F18246:0000003C     4     3 10427   7 Connect  : Connect to inst 0, receiver 0

41F18249:0000003D     4     3 10427   7 Connect  : Connect to inst 0, receiver 1

41F1824B:0000003E     4     3 10427   7 Connect  : Connect to inst 0, receiver 2

41F186F7:00000048     4     3 10401  24 KSXPOPEN: client 2 completed connection 8000000100199460 to inst 1 srqh 8000000100199500

41F18701:00000049     4     3 10401  24 KSXPOPEN: client 2 completed connection 8000000100199098 to inst 1 srqh 8000000100199138

41F18704:0000004A     4     3 10401  24 KSXPOPEN: client 2 completed connection 800000010017a448 to inst 1 srqh 800000010017a4e8