8276994: java/nio/channels/Channels/TransferTo.java leaves multi-GB files in /tmp

[LanceAndersen]

Hi,

This patch addresses the issue where the very large temp files are not cleaned up after the testMoreThanTwoGB completes.

Best
Lance

---

Progress

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Issue

• JDK-8276994: java/nio/channels/Channels/TransferTo.java leaves multi-GB files in /tmp

Reviewers

• Alan Bateman (@AlanBateman - Reviewer)

Reviewing

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[openjdk]

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[mlbridge]

Webrevs

• 03: Full - Incremental (236e1a27)
• 02: Full - Incremental (981d008e)
• 01: Full - Incremental (60ce3817)
• 00: Full (34859e00)

[AlanBateman]

Thanks for taking this one. I guess it should really be Files.delete as both files do exist, leaving it as deleteIfExists is okay. It's possible that creating targetFile will fail and leave sourceFile behind but it will be an empty file so won't fill up the file system. You should use a nested try-finally to avoid these issues. But what you have is okay for now.

[openjdk]

@LanceAndersen This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8276994: java/nio/channels/Channels/TransferTo.java leaves multi-GB files in /tmp

Reviewed-by: alanb

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 51 new commits pushed to the master branch:

• 6f35eed: 8079267: [TEST_BUG] Test java/awt/Frame/MiscUndecorated/RepaintTest.java fails
• 5e98f99: 8276800: Fix table headers in NumericShaper.html
• 2ca4ff8: 8244202: Implementation of JEP 418: Internet-Address Resolution SPI
• c29cab8: 8276112: Inconsistent scalar replacement debug info at safepoints
• aea0967: 8275854: C2: assert(stride_con != 0) failed: missed some peephole opt
• 9862cd0: 8275786: New javadoc option to add script files to generated documentation
• 7a140af: 8276546: [IR Framework] Whitelist and ignore CompileThreshold
• 91bb0d6: 8276796: gc/TestSystemGC.java large pages subtest fails with ZGC
• 08e0fd6: 8276835: G1: make G1EvacFailureObjectsSet::record inline
• ad3be04: 8276536: Update TimeZoneNames files to follow the changes made by JDK-8275766
• ... and 41 more: https://git.openjdk.java.net/jdk/compare/14d66bd438dfa1feeafaca39be8f79a91e2968e9...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[pavelrappo]

What about an exception thrown from Files.deleteIfExists(sourceFile) in that finally block?

[dfuch]

Right - maybe that should be done in a private method where the exception would be catch'ed and logged (printStackTrace) - otherwise an exception in the finally clause risks masking any exception that was thrown before the finally clause was reached.

[AlanBateman]

If this throws then Files.delete(sourceFile) will throw an NPE. I think it would be just a bit more robust to initialize sourceFile to Files.createTempFile(...) rather than null.

[AlanBateman]

Thanks for the update, looks much more robust now.

[LanceAndersen]

/integrate

[openjdk]

Going to push as commit b0d7a9d.
Since your change was applied there have been 52 commits pushed to the master branch:

• 8aae88b: 8276763: java/nio/channels/SocketChannel/AdaptorStreams.java fails with "SocketTimeoutException: Read timed out"
• 6f35eed: 8079267: [TEST_BUG] Test java/awt/Frame/MiscUndecorated/RepaintTest.java fails
• 5e98f99: 8276800: Fix table headers in NumericShaper.html
• 2ca4ff8: 8244202: Implementation of JEP 418: Internet-Address Resolution SPI
• c29cab8: 8276112: Inconsistent scalar replacement debug info at safepoints
• aea0967: 8275854: C2: assert(stride_con != 0) failed: missed some peephole opt
• 9862cd0: 8275786: New javadoc option to add script files to generated documentation
• 7a140af: 8276546: [IR Framework] Whitelist and ignore CompileThreshold
• 91bb0d6: 8276796: gc/TestSystemGC.java large pages subtest fails with ZGC
• 08e0fd6: 8276835: G1: make G1EvacFailureObjectsSet::record inline
• ... and 42 more: https://git.openjdk.java.net/jdk/compare/14d66bd438dfa1feeafaca39be8f79a91e2968e9...master

Your commit was automatically rebased without conflicts.

[openjdk]

@LanceAndersen Pushed as commit b0d7a9d.

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