Huge amount of +~JF****.tmp files created in the /tmp folder causing system to crash

[sureshkumar-ramalingam]

I got the same issue created Huge amount of +~JF****.tmp files created in the /tmp folder causing system to crash

when I look for the solution, I was navigated to the below link.

https://stackoverflow.com/questions/38783010/huge-amount-of-jf-tmp-files-in-var-cache-tomcat7-temp

Any help will be really appreciated.

[syjer]

hi @sureshkumar-ramalingam , are you using the java2d backend?

I'm not sure the pdfbox backend is calling Font.createFont.

Could you provide the java code and html example that cause this issue?

Thank you.

[sureshkumar-ramalingam]

Hi @syjer It is the pdfbox backend is calling Font.createFont. We are using a custom font file in the HTML.

Thanks,
Sureshkumar

[syjer]

Could you provide a little bit more information so we could try to reproduce the error?

For example: the html template, the code that you are using for calling openhtmltopdf.

[syjer]

hi @sureshkumar-ramalingam , are you using some svg with text in your html / or simply enabled the svg support?

openhtmltopdf/openhtmltopdf-svg-support/src/main/java/com/openhtmltopdf/svgsupport/OpenHtmlGvtFont.java

Line 49 in 9891184

font = Font.createFont(Font.TRUETYPE_FONT, new ByteArrayInputStream(fontBytes)).deriveFont(toFontWeight(fontWeight) | toStyle(fontStyle) , size);

seems to be the only code that is calling Font.createFont in the non java2d path (https://github.com/danfickle/openhtmltopdf/search?q=Font.createFont&type=code ).

If you could show us the java code that you are using for calling this library and a html it will be simpler for tracking this issue (if this library is the main cause).

[syjer]

Seems the issue is in the svg support (as reported by @olayinkasf in comment #405 (comment)).

I think I can provide a fix by handling manually a cache of temporary files with the "hash" as key, so at least for a given font, there is only one instance. On top of adding support for "File" so we can bypass this handling, I hope, in most cases.