JDK Detection failed at installation

Question

At the time of installation sapinst try to compile .java files under Z:\usr\sap\<SID>\DVEBMGS21\work
And its unable to compile files and this is what error showing in dev_jcontrol
[Thr 5880] Thu Nov 12 11:02:25 2009
[Thr 5880] *** ERROR => JStartupIGetJDKInfo: Cannot find Java class file [./JdkDetection_8936.class]. [jstartxxi.c  1017]
[Thr 5880] *** ERROR => can't get JDK information (rc = -1) [jstartxxi.c  1256]
[Thr 5880] **********************************************************************
ERROR => JDK Detection failed.
Please see SAP Note 943602 , section 'JDK detection issues'
for additional information and trouble shooting.
[Thr 5880] *** ERROR => can't read bootstrap node properites (rc=-1) [jcntrxx.c    1282]
[Thr 5880] JControlCloseProgram: started (exitcode = -1)
[Thr 5880] JControlCloseProgram: good bye... (exitcode = -1)
Any Idea What is wrong?
We already talk to SAP Support they are also looking on this error might someone already solve this error can help me.
Please and thanks
Regards,
Yogesh

Answer 1

Sapinst stopped at step 35 (or 36) - "Start Java engine"
jcontrol would not start and dev_jcontrol shows this error message - "JdkDetection_nnnn.class not found"
Our environment:
  Windows 2003
  Oracle 10.2.0.4
  Solution Manager 7.01 EhP1 SR3
  JDK - 1.4.2_24 rev-b06
JAVA_HOME=D:\java\j2sdk1.4.2_24
ORACLE_HOME=D:\oracle\SID\102
SAPEXE=D:\usr\sap\SID\SYS\exe\uc\NTAMD64
checked SAP notes:
943602   Analysis of errors within the startup of J2EE Engine 7.0
940893   Analysis of errors within the startup of J2EE Engine 6.40
718901   How to change the JDK of the J2EE Engine
817991   Startup Framework fails when starting a JLaunch process
741289   Profile parameters of the J2EE Engine are lost
943498   J2EE Engine does not start 6.40 and 7.0
There were some solutions that suggested giving "ALL" permissions to the SIDADM and SAPServiceSID users to the disk drives that we are installing the software on - we did that as well, but it did not help us. Java engine won't just start. jcontrol would just die with the same error.
After spending enormous number of hours sifting through very few documents found on this error - I got fed up and here is what I did when I got the "JdkDetection_nnnn.class not found" error:
1. Logged in to the server as SIDADM
2. Opened a windows command prompt
3. ran this command  --   jcontrol pf=D:\usr\sap\SID\SYS\profile\SID_DVEBMGS00_hostname
4. waited for 15mins
5. Restarted sapinst
6. Continued successfully
I am thinking that jcontrol was having a difficult time to start for the first time at Step 35 (or 36) during sapinst. When I started it on the command line with just the profile as the parameter - it pulled in all the required configuration from the database and started the dispatcher and server successfully. After that - installation went on smoothly.
Hope this helps.
Sri