2 types of issues which might be same issue.
============ type 1 ============
C:\\jenkins\\workspace\\9-dev-tier2-windows-x64\\JTwork\\jdk_test\\scratch\\0 <== C:../0
C:\\jenkins\\workspace\\9-dev-tier2-windows-x64\\JTwork\\jdk_test\\scratch\\foo <== C:../foo
C:\\jenkins\\workspace\\9-dev-tier2-windows-x64\\JTwork\\jdk_test\\scratch <== C:../.
C:\\jenkins\\workspace\\9-dev-tier2-windows-x64\\JTwork\\jdk_test <== C:../..
C:\\jenkins\\workspace\\9-dev-tier2-windows-x64\\JTwork\\jdk_test\\scratch <== C:..//
C:\\jenkins\\workspace\\9-dev-tier2-windows-x64\\JTwork\\jdk_test\\scratch\\0\\x.ParameterCheck <-- C:..//0\\x.ParameterCheck ==> java.io.FileNotFoundException: C:..\\0\\x.ParameterCheck (The process cannot access the file because it is being used by another process)
java.io.FileNotFoundException: C:..\\0\\x.ParameterCheck (The process cannot access the file because it is being used by another process)
at java.io.RandomAccessFile.open0(java.base@9-ea/Native Method)
at java.io.RandomAccessFile.open(java.base@9-ea/RandomAccessFile.java:327)
at java.io.RandomAccessFile.<init>(java.base@9-ea/RandomAccessFile.java:243)
at java.io.RandomAccessFile.<init>(java.base@9-ea/RandomAccessFile.java:124)
at General.check(General.java:268)
at General.checkSlashes(General.java:319)
at General.checkNames(General.java:348)
at General.checkSlash(General.java:308)
at General.checkSlashes(General.java:323)
at General.checkNames(General.java:371)
at GeneralWin32.checkDrive(GeneralWin32.java:136)
at GeneralWin32.checkDrivePaths(GeneralWin32.java:140)
at GeneralWin32.main(GeneralWin32.java:174)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-ea/Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(java.base@9-ea/NativeMethodAccessorImpl.java:62)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-ea/DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(java.base@9-ea/Method.java:531)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:226)
at java.lang.Thread.run(java.base@9-ea/Thread.java:804)

JavaTest Message: Test threw exception: java.io.FileNotFoundException
JavaTest Message: shutting down test


========== type 2 ============
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch\\0 <== C:../0
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch\\foo <== C:../foo
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch <== C:../.
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test <== C:../..
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch <== C:..//
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch\\4\\testfile.txt <== C:..//4\\testfile.txt
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch\\0 <== C:..//0
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch\\foo <== C:..//foo
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch <== C:..//.
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test <== C:..//..
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch <== C:..///
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch\\4\\testfile.txt <== C:..///4\\testfile.txt
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch\\0 <== C:..///0
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch\\foo <== C:..///foo
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch <== C:..///.
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test <== C:..///..
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch <== C:..\\
C:\\jenkins\\workspace\\9-dev-tier2-windows-i586\\JTwork\\jdk_test\\scratch\\4\\testfile.txt <-- C:..\\4\\testfile.txt ==> java.io.FileNotFoundException: C:..\\4\\testfile.txt (The system cannot find the file specified)
java.io.FileNotFoundException: C:..\\4\\testfile.txt (The system cannot find the file specified)
at java.io.FileInputStream.open0(java.base@9-ea/Native Method)
at java.io.FileInputStream.open(java.base@9-ea/FileInputStream.java:195)
at java.io.FileInputStream.<init>(java.base@9-ea/FileInputStream.java:138)
at java.io.FileInputStream.<init>(java.base@9-ea/FileInputStream.java:93)
at General.check(General.java:266)
at General.checkSlashes(General.java:319)
at General.checkNames(General.java:348)
at General.checkSlash(General.java:308)
at General.checkSlashes(General.java:326)
at General.checkNames(General.java:371)
at GeneralWin32.checkDrive(GeneralWin32.java:136)
at GeneralWin32.checkDrivePaths(GeneralWin32.java:140)
at GeneralWin32.main(GeneralWin32.java:174)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-ea/Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(java.base@9-ea/NativeMethodAccessorImpl.java:62)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-ea/DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(java.base@9-ea/Method.java:531)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:226)
at java.lang.Thread.run(java.base@9-ea/Thread.java:804)

JavaTest Message: Test threw exception: java.io.FileNotFoundException
JavaTest Message: shutting down test