[jdk8u-dev] RFR: 8295982: Failure in sun/security/tools/keytool/WeakAlg.java - ks: The process cannot access the file because it is being used by another process

[Roman Marchenko]

Test sun/security/tools/keytool/WeakAlg.java occasionally fails on Windows 64 bit (win2016, win11) with the following message "java.nio.file.FileSystemException: ks: The process cannot access the file because it is being used by another process".

The root cause of the problem is "ks" file is still open by FileInputStream instance used by KeyStore in the test code. Perhaps, forcing GC to run may avoid this issue, but I guess explicit closing of the input stream is more suitable here.

No regression, only the test code is changed.
The test passes on Windows and Linux now.

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Commit messages:
 - Forcing closing of input streams

Changes: https://git.openjdk.org/jdk8u-dev/pull/150/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=150&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295982
  Stats: 9 lines in 1 file changed: 6 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/150.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/150/head:pull/150

PR: https://git.openjdk.org/jdk8u-dev/pull/150