当CDC总是找一个非常老的SCN号而无法启动预定时，如何重置日志点

源端是ORACLE目标端是DB2：
目标端：获取预定名EBA3GRP的当前的bookmark
[cdcuser@p0-pbd-pbd-db2 bin]$ ./dmshowbookmark -I IYLINST -s EBA3GRP -v
Bookmark for instance "IYLINST" and Source ID "EBA3GRP":

Hex encoded: 00030800F48B64F47B0116C3907D470200010002609001F0010116C3907D470200010002609001F00100000000
Unable to decode the bookmark.
Use dmdecodebookmark with the hex encoded value on the source to interpret the bookmark contents.
源端：转换bookmark到SCN号
$ ./dmdecodebookmark  -I S_EBADB2 -b 00030800F48B64F47B0116C3907D470200010002609001F0010116C3907D470200010002609001F00100000000
Bookmark value:   00030800F48B64F47B0116C3907D470200010002609001F0010116C3907D470200010002609001F00100000000
Header:           000308
Restart position: 1050310669435
Commit position:  1197281934663.2.1.155792.496.1
Current position: 1197281934663.2.1.155792.496.1.0
源端：重置该预定的日志点SCN号
$ ./dmsetbookmark -I S_EBADB2 -a -s EBA3GRP -l '1197281934663;1197281934663.0.0.0.0.0;1197281934663.0.0.0.0.0.0'