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https://issues.apache.org/jira/browse/PDFBOX-3570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15665290#comment-15665290
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Caleb Cushing commented on PDFBOX-3570:
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depending on how many months, he left the company back in June. I didn't see a
follow up on that list (but that web navigator...). There is probably not any
reason to not remove it, I'm guessing he was just copying it from the openjdk
bug. Basically I'm not sure on what the right fix is for COSOutputStream is,
only what openjdk's fix is (that they never backported).
> JDK-8054565 Java 8 close contract issue
> ---------------------------------------
>
> Key: PDFBOX-3570
> URL: https://issues.apache.org/jira/browse/PDFBOX-3570
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.8.10, 1.8.11, 1.8.12
> Reporter: Caleb Cushing
>
> Java 8 bug uncovered, and wondering if the PDFBox team would be willing to
> work around it? You should probably reply with an emphatic "no", butI
> figure it is worth a shot.
> Here is the openjdk bug: https://bugs.openjdk.java.net/browse/JDK-8054565
> PDDocument.saveIncremental(OutputStream) calls close() twice - once in
> try{} and once in finally{}, relying on the Closable contract which says it
> will do nothing if the stream is already close.
> But, we see this:
> {code}
> Caused by: java.io.IOException: Closed LOB
> at
> oracle.jdbc.driver.DatabaseError.SQLToIOException(DatabaseError.java:519)
> at
> oracle.jdbc.driver.OracleBlobOutputStream.ensureOpen(OracleBlobOutputStream.java:231)
> at
> oracle.jdbc.driver.OracleBlobOutputStream.flush(OracleBlobOutputStream.java:167)
> at java.io.FilterOutputStream.flush(FilterOutputStream.java:140)
> at java.io.FilterOutputStream.close(FilterOutputStream.java:158)
> at org.apache.pdfbox.pdfwriter.COSWriter.close(COSWriter.java:300)
> at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1366)
> at ourpackage.util.pdf.PdfDRM.applyDRM(PdfDRM.java:225)
> at
> ourpackage.db.liquibase.customchanges.IQMDxContentLoader.applyDrmToCesPdfDocumentInDatabase(IQMDxContentLoader.java:383)
> at
> ourpackage.db.liquibase.customchanges.IQMDxContentLoader.applyZippedCesDocumentChangesToDatabase(IQMDxContentLoader.java:265)
> at
> ourpackage.db.liquibase.customchanges.IQMDxContentLoader.generateStatements(IQMDxContentLoader.java:153)
> ... 33 more
> {code}
> Because Java 8's FilterOutputStream.close() is calling flush() on the
> second close and Oracle's driver code doesn't like that.
> The bug can be worked around it by implementing close() in
> COSStandardOutputStream as below:
> {code}
> private boolean closed;
> @Override
> public void close() throws IOException
> {
> try (OutputStream ostream = out)
> {
> if (!closed)
> flush();
> }
> closed = true;
> }
> {code}
> I've done this in our project code base, by cloning and owning
> COSStandardOutputStream and adding it to our classpath first. Not ideal.
> Also, mailing list thread on openjdk that recognizes the bug
> http://marc.info/?t=141767408700004&r=1&w=2. Although, it is fixed in Java
> 9 with no plan of backporting. Not sure how to request a backport, but
> that would be the ideal solution.
> original mailing list report
> http://asfmail.lucidworks.io/mail_files/pdfbox-users/201509.mbox/%3ccalrfkrtvyzc1y7cfxg8x17kkmd+7byyxgxsr0umqxz_mvd0...@mail.gmail.com%3E
> (note: listed versions I know this affects)
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