Version 1.12 of the Confluence PDF Export plugin contains a fix for this problem (the backported fix for issue #191 of the Flying Saucer library).

I attached the plugin jar to this issue.

In order to break long words in the PDF export a selector containing the word-wrap property with a value of break-word has to be added to the PDF stylesheet:

http://confluence.atlassian.com/display/DOC/Editing+the+PDF+Stylesheet

For example:

div {  
    word-wrap: break-word;  
}

Version 1.12 of the Confluence PDF export plugin: http://jira.atlassian.com/secure/attachment/41304/confluence-flyingpdf-plugin-1.12.jar

This version contains the backported fix for the issue reported in https://xhtmlrenderer.dev.java.net/issues/show_bug.cgi?id=191

I am glad to seeing that this bug will be fixed on v3.4.1, that's a good news to chinese Confluence customers.
Thanks for Atlassian's support.

Henry

I am seeing a problem with long URLs causing all of the content in the column it occupies (within a table) to be cut off as well. Basically, it seems to push the column's right edge off the edge of the screen so text naturally flows over into that large space and gets cut off. Is that the same problem being reported here, or should I open another issue?

This issue is serious for me, so I'd like to try to fix it.
First I just replaced xhtmlrenderer jar in confluence-flyingpdf-plugin-1.7.jar by Flying Saucer R8', and uploaded to Confluence.
And exporting pdf, I got this error:

javax.servlet.ServletException: Servlet execution threw an exception
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:313)

caused by: java.lang.NoSuchMethodError: org.xhtmlrenderer.pdf.ITextFontResolver.addFont(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;ZLjava/lang/String;)V
at com.atlassian.confluence.extra.flyingpdf.FlyingSaucerXmlToPdfConverter.useCustomFontIfConfigured(FlyingSaucerXmlToPdfConverter.java:163)

Which version of Flying Saucer is used in confluence-flyingpdf-plugin?

It seems this issue is also related to Flying Saucer's issue below.
https://xhtmlrenderer.dev.java.net/issues/show_bug.cgi?id=206

This occured in Not only Japanese, but also English. (as attachement)

This wiki markup source is following.

じゅげむじゅげむごこうのすりきれかいじゃりすいぎょのすいぎょうまつうんらいまつふうらいまつくうねるところにすむところやぶらこうじのやぶこうじぱいぽぱいぽぱいぽのしゅーりんがんしゅーりんがんのぐーりんだいぐーりんだいのぽんぽこぴーのぽんぽこなーのちょうきゅうめいのちょうすけ

http://ja.wikipedia.org/wiki/%E5%AF%BF%E9%99%90%E7%84%A1

Adolph Blaine Charles David Earl Frederick Gerald Hubert Irvin John Kenneth Lloyd Martin Nero Oliver Paul Quincy Randolph Sherman Thomas Uncas Victor William Xerxes Yancy Zeus Wolfe­schlegelstein­hausenberger­dorffvoraltern­waren­gewissenhaft­schaferswessen­schafewaren­wohlgepflege­und­sorgfaltigkeit­beschutzen­von­angreifen­durch­ihrraubgierigfeinde­welche­voraltern­zwolftausend­jahres­vorandieerscheinen­wander­ersteer­dem­enschderraumschiff­gebrauchlicht­als­sein­ursprung­von­kraftgestart­sein­lange­fahrt­hinzwischen­sternartigraum­auf­der­suchenach­diestern­welche­gehabt­bewohnbar­planeten­kreise­drehen­sich­und­wohin­der­neurasse­von­verstandigmen­schlichkeit­konnte­fortplanzen­und­sicher­freuen­anlebens­langlich­freude­und­ruhe­mit­nicht­ein­furcht­vor­angreifen­von­anderer­intelligent­geschopfs­von­hinzwischen­sternartigraum, Senior

http://en.wikipedia.org/wiki/Wolfe%2B585,_Senior

A fix for this issue is unavailable yet since we use Flying Saucer's xhtml renderer which doesn't support word-breaking.

See https://xhtmlrenderer.dev.java.net/issues/show_bug.cgi?id=191

From support case:

If confluence fail to wrap long text in PDF exporting, it would be no use for chinese users to use the wiki system for pubulishing documents to the others. Please help to resolve this issue soon.

In my imagine，the issue didn't present in some earlier version of confluence.

This issue is affecting several of our customer instances located in Asian Locale (e.g. Japan, China).

As most of instances are managed by our partners, this issue has less votes then it should.

We have the same issue with confluence 3.0.2. Please fix this ASAP.

I have a page with Chinese contents and when I do export to PDF, the page contents did not get wrapped and the contents were truncated. However this is not the case with contents in english language.
I have seen the issue "http://jira.atlassian.com/browse/CONF-6738" where it says the issue is fixed with confluence2.6.

I am using confluence 3.0.2 and the issue is still there for foreign characters.
Please advise how to get through this.