XWiki Platform

Formula macro invokes infinite loop

Details

  • Type: Bug Bug
  • Status: Open Open
  • Priority: Critical Critical
  • Resolution: Unresolved
  • Affects Version/s: 3.2
  • Fix Version/s: None
  • Component/s: Formula
  • Labels:
    None
  • Environment:
    Win 7 Professional, 64 bit
  • Difficulty:
    Unknown
  • Similar issues:
    XWIKI-4803Infinite loop when trying to execute transformations for xwiki/1.0 syntax containing html
    XWIKI-6702Formula macro fails displaying too large formulas
    XWIKI-4115Include macro should protect from recursive inclusion
    XWIKI-6761Turn implementation of formula macro to MathJAX
    XWIKI-4139New {{formula}} macro for displaying mathematical expressions
    XWIKI-7239Infinite loop in XWikiAttachment.getVersionList() consumes all available memory when called.
    XWIKI-4240Formula & Chart macros are missing a default category
    XWIKI-3330Redirect loop in xwiki when running with apache httpd
    XWIKI-9143LaTeX formulas were not exported
    XWIKI-2080Server hangs while rendering certain pages

Description

I installed a fresh XWiki setup. I go to the Sandbox, edit the page and insert a formula macro. When I now try to preview or save the file, XWiki invokes the dvips.exe, but runs it in an infinite loop. I have to kill the dvips process in the Windows task manager, otherwise the whole Wiki is frozen. Afterwards, XWiki displays the page correctly, including the formula (a perfectly rendered fraction).
I'm using the latest MiKTeX 2.9 and its binaries are in the PATH. I use MiKTeX daily for my documents, so I can say that dvips works fine from within LaTeX - it must be a bug in XWiki 3.2.

(On another system I run XWiki 2.4 and there the formula macro works without problems with MiKTeX 2.9.)

  1. Text File
    bug-1045.txt
    16/Nov/11 13:13
    14 kB
    Uwe Stöhr
  2. Text File
    bug-1045-2.txt
    16/Nov/11 13:29
    19 kB
    Uwe Stöhr

Activity

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Sergiu Dumitriu added a comment -

Can you post the stacktrace from the JVM when this happens? You can get that by pressing Ctrl+Break in the console where the JVM is running.

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Sergiu Dumitriu added a comment - Can you post the stacktrace from the JVM when this happens? You can get that by pressing Ctrl+Break in the console where the JVM is running.
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Uwe Stöhr added a comment -

Stacktrace

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Uwe Stöhr added a comment - Stacktrace
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Uwe Stöhr added a comment -

Another stacktrace when i try to stop the XWiki server. Stopping is impossible because of this bug. I first need to stop dvips.exe via the task manager

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Uwe Stöhr added a comment - Another stacktrace when i try to stop the XWiki server. Stopping is impossible because of this bug. I first need to stop dvips.exe via the task manager
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Uwe Stöhr added a comment -

I found the problem: XWiki generates LaTeX code which tries to use the LaTeX package "pst-plot.sty". MiKTeX automatically installs this package, but then dvips goes to an infinite loop. When I uninstall this package and tell MiKTeX not to install it when XWiki asks for it, formulas are displayed without problems. So the bug is in the LaTeX code XWiki generat4es in the background.
I'm relatively fit in LaTeX, so when you could give me the LaTeX code XWiki generates, I could have a look what goes wrong and why is pst-plot called although it is not necessary. (pst-plot is part of the package "PSTricks" and can only handle PostScript. So when pdflatex comes into play, pst-plot will fail.)

Show
Uwe Stöhr added a comment - I found the problem: XWiki generates LaTeX code which tries to use the LaTeX package "pst-plot.sty". MiKTeX automatically installs this package, but then dvips goes to an infinite loop. When I uninstall this package and tell MiKTeX not to install it when XWiki asks for it, formulas are displayed without problems. So the bug is in the LaTeX code XWiki generat4es in the background. I'm relatively fit in LaTeX, so when you could give me the LaTeX code XWiki generates, I could have a look what goes wrong and why is pst-plot called although it is not necessary. (pst-plot is part of the package "PSTricks" and can only handle PostScript. So when pdflatex comes into play, pst-plot will fail.)

People

  • Assignee:
    Unassigned
    Reporter:
    Uwe Stöhr
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