Hi,
without looking at your code, is there a specific reason why you use
1.4.2?
Just the actual version (currently 2.1.3) is supported here. Maybe the
behaviour you described has been fixed in the 20+ versions which have
been appeared since then. If you can't upgrade easily try at least
version 1.4.8 which is the last bugfix version of 1.4.
Regards,
ToM
> Hi,
>
> Versions used:
> iText: 1.4.2
> java: 1.5.0_14
>
> To sign files, I'm basically using this snippet:
>
> reader = new PdfReader(new
> RandomAccessFileOrArray(file.getInputFile().getPath()), null);
> PdfStamper stp = PdfStamper.createSignature(reader, new
> FileOutputStream(file.getOutputFile()), '\0', this.tempFile, true);
> PdfSignatureAppearance sap = stp.getSignatureAppearance();
> sap.setCrypto(null, this.getToken().getCertificateChain(), null,
> PdfSignatureAppearance.WINCER_SIGNED);
> sap.setExternalDigest(new byte[128], new byte[20], "RSA");
> if (file.getSettings().needsCertification()) {
> sap.setCertified(true);
> }
>
> but am experiencing problems with it every now and then. The signing
> is done in a batch process, processing thousands of documents a day,
> but every now and then I get one of the folowing 2 exceptions:
>
>
> "Append mode requires a document without errors even if recovery was
> possible.":
>
> Oct 6 13:39:14 app02 2008-10-06 13:39:14,640 Finalizer-1 ERROR
> (PDFFileSigner:102) - 7810588_WEBPOST_93931544_36512821_(zzz document
> owner) Problem while signing QueuedFile [in:
> '/var/um/archive/236/200810/xyz.pdf', out:
> '/usr/local/um/server/temp/archive/236/200810/xyz.pdf', settings:
> (timestamp: true, certify: false,
> alias: default, reason: 'Approved', token: JDBCTOKEN)]: Append mode
> requires a document without errors even if recovery was possible.
> Oct 6 13:39:14 app02 com.lowagie.text.DocumentException: Append mode
> requires a document without errors even if recovery was possible.
> Oct 6 13:39:14 app02 at
> com.lowagie.text.pdf.PdfStamperImp.<init>(Unknown Source)
> Oct 6 13:39:14 app02 at
> com.lowagie.text.pdf.PdfStamper.<init>(Unknown Source)
> Oct 6 13:39:14 app02 at
> com.lowagie.text.pdf.PdfStamper.createSignature(Unknown Source)
>
> or
>
> "Invalid object number. at file pointer 2931"
>
> Oct 6 13:43:32 app02 2008-10-06 13:43:32,193 Finalizer-2 ERROR
> (PDFFileSigner:102) - 7812133_WEBPOST_93934810_36515796_(zzz document
> owner)
> Problem while signing QueuedFile [in:
> '/var/um/archive/236/200810/abc.pdf', out:
> '/usr/local/um/server/temp/archive/236/200810/abc.pdf', settings:
> (timestamp: true, certify: false,
> alias: default, reason: 'Approved', token: JDBCTOKEN)]: Invalid object
> number. at file pointer 2931 Oct 6 13:43:32 app02 Oct 6 13:43:32
> app02 2008-10-06 13:43:32,194 Finalizer-2 ERROR (FinalizerAction:77) -
> 7812133_WEBPOST_93934810_36515796_(Lampiris document owner)
> signItem()
> Oct 6 13:43:32 app02 java.lang.StringIndexOutOfBoundsException:
> String index out of range: -1
> Oct 6 13:43:32 app02 at java.lang.String.substring(String.java:1768)
> Oct 6 13:43:32 app02 at java.lang.String.substring(String.java:1735)
> Oct 6 13:43:32 app02 at
> org.apache.log4j.net.SyslogAppender.append(SyslogAppender.java:254)
> Oct 6 13:43:32 app02 at
> org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:221)
> Oct 6 13:43:32 app02 at
>
> org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:57)
> Oct 6 13:43:32 app02 at
> org.apache.log4j.Category.callAppenders(Category.java:187)
> Oct 6 13:43:32 app02 at
> org.apache.log4j.Category.forcedLog(Category.java:372)
> Oct 6 13:43:32 app02 at
> org.apache.log4j.Category.log(Category.java:864)
>
>
> I copied the PDF files from the system and tried signing them again,
> and I get no errors anymore. Have any of you seen these errors before
> and know where I should be looking at? Is there a tool i can use to
> inspect the well-formedness of the PDF files?
>
>
> Sincerely,
>
> Gerrit
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