Debugging Barbara Unverferth 1 Techniques March 2002

2 Agenda  Debugging difficulties with today’s technology  How to break a problem apart  What tools are available to you?  Problem Isolation System  Demo of Problem Isolation System and Support Site search capabilities

3 Debugging Difficulties with Today’s Technology  The “olden days”: COBOL to VSAM on MVS  Today:  Multi-tiered  Multi-vendor  Multi-products  Communications  DBMS’s  Security  Different people supporting different aspects

4 How to Break a Problem Apart  -12 data receive error, Error in transferring data, ODIN_10, or ODIN_4….”Where do I start?”  Identify the components and pull them apart  What is on each platform?  If existing application, what changed?

5 What Tools are Available for You?  Rdaapp, API Query Tool  Edastart –t, Interactive Agent, TSCOM3 in batch on MVS  Tracing  Turning retrieval off

6 What Tools are Available for You?  Rdaapp, API Query Tool – NT:

7 What Tools are Available for You?  Rdaapp, API Query Tool – UNIX, MVS, VM: >> Default communications config file : /u2/css/ibi/srv51/ffs/etc/odin.cfg Override? (Press enter for default) : >> Enter User Name : Enter Password : Enter server name, number, SELF, URL or ? (Hit return for 'LOOPBACK') : >> Enter Command (? for command help):

8 What Tools are Available for You?  RDAAPP commands:  A Attach(Bind) paramters to prepared statement  B Browse...  C Commit  D Describe  E Execute  F Issue FOCUS REQUEST ;  I Set EDAINFO display  M Set fetch mode to A[lpha] or B[inary]  O Set fetch mode to one row at a time  P Prepare SQL ;  Q Disconnect  R Rollback  S Execute SQL or ? for help;  T Set trace display  U Unprepare  V Inspect/Set [ ]  X Execute RPC [ ] or ? for help

9 What Tools are Available for You?  Edastart –t, Interactive Agent, TSCOM3 in batch on MVS

10 What Tools are Available for You?  Edastart –t, Interactive Agent, TSCOM3 in batch on MVS  Allows you to test without using any communications or workload management  FOCUS-like environment  Dialogue manager commands must be in a FOCEXEC

11 What Tools are Available for You?  Edastart –t, Interactive Agent, TSCOM3 in batch on MVS  Any errors generated from profiles should be shown here  Not full screen mode so cannot use TED or CRTFORM  FIN to exit

12 What Tools are Available for You?  Tracing Tool on NT:

13 What Tools are Available for You?  Tracing Components  SET TRACEON=component  Can be placed in global or user profiles, Remote Procecure Call  More detail at:  To trace at a user level:  SET TRACEUSER=ON  How to get just the SQL  SET TRACEON=STMTRACE  Extract the SQL generated and running in native SQL tool  How to turn off other components:  SET TRACEOFF=ALL

14 What Tools are Available for You?  Tracing Hub and Sub  Trace commands can be put in profile at each server  If using –REMOTE BEGIN: -REMOTE BEGIN SET TRACEOFF=ALL SET TRACEON=STMTRACE SET TRACEUSER=ON TABLE FILE …..

15 What Tools are Available for You?  Turning retrieval off:  SET XRETRIEVAL = OFF  Good for testing problems that occur prior to or after (and not related to) data retrieval  Do not need to have DBMS table created

16 An Example  -12 from an application when running a Remote Procedure Call (RPC)  First, remove application (MS Acccess, etc)  Test with API Query Tool (rdaapp) from client and at server level  Does the problem still occur?  If yes, then test with Interactive Agent (edastart –t)  You will sometimes get a more descriptive error here

17 Another Example Here is our configuration: Windows NT  Microsoft Access  ODBC  Hub  TCP/IP  HP-UX  Sub  Oracle

18 Let’s remove these pieces one by one: Remove components one at a time

19 First we take out Microsoft Access, test using ODBC Query Tool: Remove Microsoft Access

20 ODBC Test Tool

21 If the problem still occurs, we can remove ODBC and test using the API client query tool to access the hub directly Remove ODBC

22 API Test Tool

23 If problem still exists, we can remove the hub and test directly on the sub, using the EDA client query tool Remove Hub, go directly to Sub

24 >> Default communications config file : /u2/css/ibi/srv51/ffs/etc/odin.cfg Override? (Press enter for default) : >> Enter User Name : Enter Password : Enter server name, number, SELF, URL or ? (Hit return for 'LOOPBACK') : >> Enter Command (? for command help): RDAAPP on HP-UX Sub

25 If problem still exits, we can remove the communications and test the agent directly using the Interactive Agent Remove Communications

26 RELEASE = R720510B GEN_NUM = SOURCE_DATE = 10/30/ :04:49 BUILD_DATE = 10/31/ :26:14 INSTALLATION_DATE= 10/31/ :54:29 >> Edastart –t on HP-UX

27 Using the Interactive Agent, we are able to see the underlying error: Problem found!

28 Problem Isolation System  Web-based application  Walks you through the components  Provides information on how to test at each level  Shows how to run test tools  Explains how to turn on tracing  Located on support site at:

29 Demonstration of Problem Isolation System and Support Site Search Capabilities  Live demo but in case that doesn’t work…

30 Demonstration of Problem Isolation System and Support Site Search Capabilities

31 Demonstration of Problem Isolation System and Support Site Search Capabilities

32 Demonstration of Problem Isolation System and Support Site Search Capabilities

33 Demonstration of Problem Isolation System and Support Site Search Capabilities

34 Demonstration of Problem Isolation System and Support Site Search Capabilities

35 Demonstration of Problem Isolation System and Support Site Search Capabilities

36 Demonstration of Problem Isolation System and Support Site Search Capabilities

37 Demonstration of Problem Isolation System and Support Site Search Capabilities

38 Demonstration of Problem Isolation System and Support Site Search Capabilities

39 Demonstration of Problem Isolation System and Support Site Search Capabilities

40 Demonstration of Problem Isolation System and Support Site Search Capabilities

41 Demonstration of Problem Isolation System and Support Site Search Capabilities

42 Demonstration of Problem Isolation System and Support Site Search Capabilities

43 Demonstration of Problem Isolation System and Support Site Search Capabilities

44 Demonstration of Problem Isolation System and Support Site Search Capabilities

45 Demonstration of Problem Isolation System and Support Site Search Capabilities

46 Demonstration of Problem Isolation System and Support Site Search Capabilities

47 Demonstration of Problem Isolation System and Support Site Search Capabilities Support site

48 Demonstration of Problem Isolation System and Support Site Search Capabilities Support site

49 Demonstration of Problem Isolation System and Support Site Search Capabilities

50 Demonstration of Problem Isolation System and Support Site Search Capabilities

51 Demonstration of Problem Isolation System and Support Site Search Capabilities

52 Demonstration of Problem Isolation System and Support Site Search Capabilities

53 Demonstration of Problem Isolation System and Support Site Search Capabilities

54 Demonstration of Problem Isolation System and Support Site Search Capabilities

55 Demonstration of Problem Isolation System and Support Site Search Capabilities

56 Demonstration of Problem Isolation System and Support Site Search Capabilities

57 Demonstration of Problem Isolation System and Support Site Search Capabilities

58 Demonstration of Problem Isolation System and Support Site Search Capabilities

59 Demonstration of Problem Isolation System and Support Site Search Capabilities

60 Demonstration of Problem Isolation System and Support Site Search Capabilities

61 Demonstration of Problem Isolation System and Support Site Search Capabilities

62 Demonstration of Problem Isolation System and Support Site Search Capabilities

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65 Demonstration of Problem Isolation System and Support Site Search Capabilities