You can set the ulimit on Linux - Standard is 1024 open files.
BR
Maruan
> Am 14.03.2023 um 16:05 schrieb Gilad Denneboom <gilad.denneb...@gmail.com>:
>
> Hi all,
>
> I created an application that opens many files (I'm talking thousands),
> searching them for specific pages and then merges those pages into new PDF
> files. The way I do it is by using the importPage command from the original
> files into the split ones.
> However, I'm getting an IOException ("Too many open files") from
> ScratchFile after several thousands files were processed. I had a look at
> the source code for that class and I think it might have to do with a
> RandomAccessFile variable ("raf") not being properly closed.
> All of the documents are opened using MemoryUsageSetting set to
> setupTempFileOnly, by the way.
> Could someone confirm this is the issue, and maybe help solve it? I'm using
> PDFBox 2.0.26, by the way, and the app runs on a Mac.
>
> The stack-trace:
> Exception in thread "main" java.io.IOException: Too many open files
> at java.base/java.io.UnixFileSystem.createFileExclusively0(Native Method)
> at
> java.base/java.io.UnixFileSystem.createFileExclusively(UnixFileSystem.java:356)
> at java.base/java.io.File.createTempFile(File.java:2179)
> at org.apache.pdfbox.io.ScratchFile.enlarge(ScratchFile.java:217)
> at org.apache.pdfbox.io.ScratchFile.getNewPage(ScratchFile.java:167)
> at
> org.apache.pdfbox.io.ScratchFileBuffer.addPage(ScratchFileBuffer.java:126)
> at org.apache.pdfbox.io.ScratchFileBuffer. <init>(ScratchFileBuffer.java:84)
> at org.apache.pdfbox.io.ScratchFile.createBuffer(ScratchFile.java:424)
> at org.apache.pdfbox.cos.COSStream.createRaw0utputStream(COSStream.java:273)
> at org.apache.pdfbox.pdfparser.COSParser.parseCOSStream(COSParser.java:1140)
> at org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:929)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:888)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:800)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseDictObjects(COSParser.java:760)
> at org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:187)
> at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:226)
> at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1107)
> at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1090)
> at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1014)
> at MergeStudentRecords_2021.main(MergeStudentRecords_2021.java:324)
>
> Thanks in advance!
>
> Gilad
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