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https://issues.apache.org/jira/browse/COMPRESS-708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18018860#comment-18018860
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Gary D. Gregory commented on COMPRESS-708:
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Hello [~yuweiboy]
Feel free to provide a PR on GitHub.
> ZstdCompressorInputStream has a bug where the InputStream held by
> ZipArchiveInputStream gets closed during garbage collection (GC)
> ----------------------------------------------------------------------------------------------------------------------------------
>
> Key: COMPRESS-708
> URL: https://issues.apache.org/jira/browse/COMPRESS-708
> Project: Commons Compress
> Issue Type: Bug
> Reporter: 赵钰玮
> Priority: Major
> Attachments: image-2025-09-03-22-46-38-243.png
>
>
> {code:java}
> @Test
> void testZstdInputStreamErrorCloseWhenGc() throws Exception {
> final File archive = getFile("COMPRESS-692/compress-692.zip");
> for (int i =0; i< 50;i++) {
> try (FileInputStream fileInputStream = new FileInputStream(archive);
> ZipArchiveInputStream zipArchiveInputStream = new
> ZipArchiveInputStream(fileInputStream)){
> ArchiveEntry entry;
> while ((entry = zipArchiveInputStream.getNextEntry()) != null) {
> if (entry.isDirectory()) {
> continue;
> }
> System.gc();
> IOUtils.toByteArray(zipArchiveInputStream);
> }
> } catch (IOException e) {
> fail("testZstdInputStreamErrorCloseWhenGc error, test error at
> batch " + (i+1), e);
> }
> }
> } {code}
> Here is the test method. Without the line {{{}System.gc();{}}}, it may take
> multiple execution rounds to trigger the bug, but with this line added, the
> bug is almost immediately triggered. Below is the error stack log.
> !image-2025-09-03-22-46-38-243.png!
> I found that this is caused by the following: The bug occurred because the
> ZstdInputStream used in ZstdCompressorInputStream would close the underlying
> InputStream during GC, which in turn caused errors like "stream closed" for
> other wrapper streams (such as ZipArchiveInputStream) that depend on this
> underlying stream.
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