我的同事正在尝试通过DB2/MVS适配器将BizTalk 2006 R2连接到z/OS大型机上托管的数据库。当测试连接设置时,他们得到以下错误
Could not connect to data source 'New Data Source':
The network connection was terminated because the host failed to send any data.
SQLSTATE: 08S01, SQLCODE: -605
当将设置放在常规连接字符串中并使用.NET代码打开时,这很好。我不熟悉BizTalk和DB2。当这个错误出现时,有人能建议应该注意什么吗?
2008年8月24日:
如果使用带有常规DB2连接字符串的普通.NET代码,则可以建立连接并提交查询。这个DB2适配器报告的是,它甚至不能进行正确的连接握手,更不用说提交查询了。我不确定实现DB2连接所涉及的实际机制是什么。
2008年8月25日:
根据
this MSDN forums posting
我看到了这一点,但这里的情况并非如此。如果我们将用户名作为包集合,它仍然会遇到相同的问题。
由于Microsoft产品中缺少有关连接大型机DB2数据库的信息,我承担了检查原始网络数据包的任务,以了解.NET DB2提供程序的连接(正常工作)和BizTalk 2006 DB2适配器(正常工作)之间的情况。我观察到DB2通信是使用DRDA协议完成的。并最终得出结论,BizTalk适配器方法由于服务器的reply SECCHKRM数据包中记录的内容而失败
DRDA (Security Check)
DDM (SECCHKRM)
Length: 55
Magic: 0xd0
Format: 0x02
0... = Reserved: Not set
.0.. = Chained: Not set
..0. = Continue: Not set
...0 = Same correlation: Not set
DSS type: RPYDSS (2)
CorrelId: 0
Length2: 49
Code point: SECCHKRM (0x1219)
Parameter (Severity Code)
Length: 6
Code point: SVRCOD (0x1149)
Data (ASCII):
Data (EBCDIC):
Parameter (Security Check Code)
Length: 5
Code point: SECCHKCD (0x11a4)
Data (ASCII):
Data (EBCDIC):
Parameter (Server Diagnostic Information)
Length: 34
Code point: SRVDGN (0x1153)
Data (ASCII): \304\331\304\301@\301\331z@\301\344\343\310\305\325\343\311\303\301\343\311\326\325@\206\201\211\223\205\204
Data (EBCDIC): DRDA AR: AUTHENTICATION failed
我无法理解为什么在.NET提供程序中成功使用相同的凭据时会失败。现在,我能观察到的是,当涉及到传输的数据包序列时,每种方法之间都有显著的差异。
No. Time Source Destination Protocol Info
1 0.000000 [client IP] [DB2 server IP] TCP kpop > 50000 [SYN] Seq=0 Win=65535 Len=0 MSS=1460 WS=1
2 0.000399 [DB2 server IP] [client IP] TCP 50000 > kpop [SYN, ACK] Seq=0 Ack=1 Win=16384 Len=0 MSS=1460 WS=0
3 0.000414 [client IP] [DB2 server IP] TCP kpop > 50000 [ACK] Seq=1 Ack=1 Win=65536 [TCP CHECKSUM INCORRECT] Len=0
4 0.000532 [client IP] [DB2 server IP] DRDA EXCSAT | ACCSEC
5 0.038162 [DB2 server IP] [client IP] DRDA EXCSATRD | ACCSECRD
6 0.041829 [client IP] [DB2 server IP] DRDA ACCSEC | SECCHK | ACCRDB
7 0.083626 [DB2 server IP] [client IP] TCP 50000 > kpop [ACK] Seq=108 Ack=542 Win=65535 Len=0
8 0.190534 [DB2 server IP] [client IP] DRDA ACCSECRD | SECCHKRM | ACCRDBRM | SQLCARD
9 0.199776 [client IP] [DB2 server IP] DRDA PRPSQLSTT | SQLATTR | SQLSTT | OPNQRY
10 0.293307 [DB2 server IP] [client IP] TCP [TCP segment of a reassembled PDU]
11 0.293359 [DB2 server IP] [client IP] TCP [TCP segment of a reassembled PDU]
12 0.293377 [client IP] [DB2 server IP] TCP kpop > 50000 [ACK] Seq=870 Ack=1444 Win=64092 [TCP CHECKSUM INCORRECT] Len=0
13 0.293404 [DB2 server IP] [client IP] TCP [TCP segment of a reassembled PDU]
14 0.293452 [DB2 server IP] [client IP] TCP [TCP segment of a reassembled PDU]
15 0.293461 [client IP] [DB2 server IP] TCP kpop > 50000 [ACK] Seq=870 Ack=2516 Win=65536 [TCP CHECKSUM INCORRECT] Len=0
16 0.293855 [DB2 server IP] [client IP] TCP [TCP segment of a reassembled PDU]
17 0.293908 [DB2 server IP] [client IP] DRDA SQLDARD
18 0.293918 [client IP] [DB2 server IP] TCP kpop > 50000 [ACK] Seq=870 Ack=3588 Win=64464 [TCP CHECKSUM INCORRECT] Len=0
19 0.293957 [DB2 server IP] [client IP] DRDA QRYDSC
20 0.294008 [DB2 server IP] [client IP] DRDA QRYDTA
21 0.294017 [client IP] [DB2 server IP] TCP kpop > 50000 [ACK] Seq=870 Ack=4660 Win=65536 [TCP CHECKSUM INCORRECT] Len=0
22 0.294023 [DB2 server IP] [client IP] DRDA SQLCARD
23 0.295346 [client IP] [DB2 server IP] DRDA RDBCMM
24 0.297868 [DB2 server IP] [client IP] DRDA ENDUOWRM | SQLCARD
25 0.421392 [client IP] [DB2 server IP] DRDA PRPSQLSTT | SQLATTR | SQLSTT | OPNQRY
26 0.456504 [DB2 server IP] [client IP] DRDA SQLDARD | OPNQRYRM | TYPDEFNAM | QRYDSC | QRYDTA | ENDQRYRM | TYPDEFNAM | SQLCARD
27 0.456756 [client IP] [DB2 server IP] DRDA RDBCMM
28 0.488311 [DB2 server IP] [client IP] DRDA ENDUOWRM | SQLCARD
29 0.498806 [client IP] [DB2 server IP] DRDA PRPSQLSTT | SQLATTR | SQLSTT | OPNQRY
30 0.630477 [DB2 server IP] [client IP] TCP 50000 > kpop [ACK] Seq=5157 Ack=1579 Win=65171 Len=0
31 0.788165 [DB2 server IP] [client IP] DRDA SQLDARD | OPNQRYRM | TYPDEFNAM | QRYDSC | QRYDTA
32 0.788203 [DB2 server IP] [client IP] DRDA ENDQRYRM
33 0.788225 [client IP] [DB2 server IP] TCP kpop > 50000 [ACK] Seq=1579 Ack=5815 Win=64380 [TCP CHECKSUM INCORRECT] Len=0
34 0.788648 [client IP] [DB2 server IP] DRDA RDBCMM
35 0.795951 [DB2 server IP] [client IP] DRDA ENDUOWRM | SQLCARD
36 0.807365 [client IP] [DB2 server IP] DRDA PRPSQLSTT | SQLATTR | SQLSTT | OPNQRY
37 0.838046 [DB2 server IP] [client IP] DRDA SQLDARD | OPNQRYRM | TYPDEFNAM | QRYDSC | QRYDTA | ENDQRYRM | TYPDEFNAM | SQLCARD
38 0.838328 [client IP] [DB2 server IP] DRDA RDBCMM
39 0.841866 [DB2 server IP] [client IP] DRDA ENDUOWRM | SQLCARD
40 0.973506 [client IP] [DB2 server IP] TCP kpop > 50000 [ACK] Seq=1906 Ack=6304 Win=65482 [TCP CHECKSUM INCORRECT] Len=0
BizTalk DB2适配器
No. Time Source Destination Protocol Info
1 0.000000 [client IP] [DB2 server IP] TCP 28165 > 50000 [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=8
2 0.002587 [DB2 server IP] [client IP] TCP 50000 > 28165 [SYN, ACK] Seq=0 Ack=1 Win=16384 Len=0 MSS=1460 WS=0
3 0.010146 [client IP] [DB2 server IP] TCP 28165 > 50000 [ACK] Seq=1 Ack=1 Win=65536 Len=0
4 0.019698 [client IP] [DB2 server IP] DRDA EXCSAT
5 0.020849 [DB2 server IP] [client IP] DRDA EXCSATRD
6 0.034699 [client IP] [DB2 server IP] DRDA ACCSEC
7 0.036584 [DB2 server IP] [client IP] DRDA ACCSECRD
8 0.042031 [client IP] [DB2 server IP] DRDA SECCHK
9 0.046350 [DB2 server IP] [client IP] DRDA SECCHKRM
10 0.046642 [DB2 server IP] [client IP] TCP 50000 > 28165 [FIN, ACK] Seq=160 Ack=200 Win=65336 Len=0
11 0.053787 [client IP] [DB2 server IP] TCP 28165 > 50000 [ACK] Seq=200 Ack=161 Win=65536 Len=0
12 0.056891 [client IP] [DB2 server IP] DRDA ACCRDB
13 0.058084 [DB2 server IP] [client IP] TCP 50000 > 28165 [RST, ACK] Seq=161 Ack=295 Win=0 Len=0
有趣的是,可以看到.NET提供程序在单个TCP段中发出各种DRDA协议包。另一方面,BizTalk适配器在每个TCP段中只放置一个协议数据包。我不知道为什么会这样。然而,我目前认为这是一个转移视线的问题,导致身份验证失败的真正区别在于DRDA数据交换。我不知道DRDA协议,所以我必须先研究它,然后才能理解它。
在这个阶段,问题仍然没有得到解决,因为从DB2DBA团队获得合作和从Microsoft获得帮助遇到了许多障碍。
我想报告的是,我观察到所有成功连接案例与失败尝试之间的一个关键区别:
BizTalk DB2适配器正在底层使用
用于DB2的Microsoft ODBC驱动程序
. 其他成功的软件测试利用
IBM DB2 ODBC驱动程序IBMCL1
. IBM驱动程序的参数配置不同于Microsoft的驱动程序。但我们没有看到任何明显的关键差异,这可能导致Microsoft驱动程序的身份验证失败。
