Problem Description : Shell based tests in JTREG doesn't complete in a clean way, When run in automated way they fail due to Create Process Exception & when run in a command line mode they throw writing: The pipe is being closed error message.

Tested_Java_Release : 1.6.0
Tested_Build : B92
Operating System : Windwos VISTA (Only)
Machine Name : vm-em64t-01.sfbay.sun.com
Tet Suites : JDI_REGRESSION / MM_REGRESSION
Results Location : http://vmsqe.sfbay/weekly/mustang/results/1.6.0-rc-b92/ClientVM/WINDOWSVISTA/mixed/VM8/index.html

Error Message when run in Automated Way : test result: Failed. Execution failed: Error invoking program `sh': java.io.IOException: CreateProcess: sh -c "TESTJAVAHOME=c:/temp/Work/JDK/WEEKLYmtg/VM7/windows-i586 SystemRoot=C:\\Windows PATH=C:/MKS/mksnt TESTVMOPTS=-server TESTSRC=X:\\gtee\\DTWS\\suites\\JDI_REGRESSION\\testbase\\test\\com\\sun\\jdi TESTCLASSES=C:\\temp\\Work\\exec\\JDI_REGRESSION-07-WEEKLYmtg-VM7-ServerVM-mixed-WINDOWSVISTA-2006-06-12-16-42-07-0732\\classes\\com\\sun\\jdi TESTJAVA=c:/temp/Work/JDK/WEEKLYmtg/VM7/windows-i586 sh X:\\gtee\\DTWS\\suites\\JDI_REGRESSION\\testbase\\test\\com\\sun\\jdi\\CatchAllTest.sh" error=87

Error Message when run in Automated Way :
echo: cmd 412: mydojdbCmds 631: startJdb 639: runitAfterSetup 845: runit 839: Y:/backup/testbase/JDI-REGRESSION/test/com/sun/jdi/ArrayLengthDumpTest.sh 87: writing: The pipe is being closed.

Note :
(1.) The similar tests are running fine on diff Windows platforms.
Down Graded to P4. Bug has been open for 2 years.