+ Post New Thread
Results 1 to 13 of 13
Internet Related/Filtering/Firewall Thread, Java Crashing "Randomly" in Technical; Hi folks, We seem to have a problem with Java, but unfortunately it's proving difficult to resolve. One of the ...
  1. #1
    Gongalong's Avatar
    Join Date
    Oct 2011
    Location
    United Kingdom
    Posts
    908
    Thank Post
    820
    Thanked 19 Times in 17 Posts
    Rep Power
    10

    Question Java Crashing "Randomly"

    Hi folks,

    We seem to have a problem with Java, but unfortunately it's proving difficult to resolve.

    One of the ICT lessons requires that the students go to the Little Man Computer site, which has a java applet: LMC Simulator

    This worked in the previous academic year, but for some unclear reason it's now crashing IE. Oddly it's not crashing for all students, and doesn't appear to be an issue when the local administrator.

    Things I've tried without success:

    1. Updating Java to the latest version.
    2. Removing Ranger.

    I deleted the profile for a student where it was working, and subsequent to the profile delete it's now crashing for them as well.

    Any ideas as this is rather desperate for an ICT lesson next week?

    Plan B is to install Chrome on the required PCs.

    TIA

  2. #2
    Duke5A's Avatar
    Join Date
    Jul 2010
    Posts
    807
    Thank Post
    83
    Thanked 132 Times in 115 Posts
    Blog Entries
    8
    Rep Power
    32
    Check settings in the Java control panel applet. I've seen issues where Java doesn't pick up system proxy settings correctly, and even had another issue where the temporary cache settings were set too low and causing an applet to crash all the time.

  3. Thanks to Duke5A from:

    Gongalong (16th November 2012)

  4. #3

    Join Date
    Mar 2010
    Location
    Leeds
    Posts
    421
    Thank Post
    80
    Thanked 47 Times in 42 Posts
    Rep Power
    18
    I think this seems to be the same problem we are having. websites that require java like DL Online - Login , Wordle - Beautiful Word Clouds , Screencast-O-Matic - Free online screen recorder for instant screen capture video sharing. , all seem to cause big problems here.

  5. #4
    themightymrp's Avatar
    Join Date
    Dec 2009
    Location
    Leeds, West Yorkshire
    Posts
    1,221
    Thank Post
    216
    Thanked 227 Times in 196 Posts
    Rep Power
    73
    You could also go under the Advanced tab in the Java control panel and enable debugging. You might find something in the output?

  6. 2 Thanks to themightymrp:

    Gongalong (13th February 2013), jonnykewell1 (1st February 2013)

  7. #5

    Join Date
    Mar 2010
    Location
    Leeds
    Posts
    421
    Thank Post
    80
    Thanked 47 Times in 42 Posts
    Rep Power
    18
    Cheers Phil will have a look =)

  8. #6
    Gongalong's Avatar
    Join Date
    Oct 2011
    Location
    United Kingdom
    Posts
    908
    Thank Post
    820
    Thanked 19 Times in 17 Posts
    Rep Power
    10
    Duke5A/themightymrp: unfortunately for students it's all disabled through GPO. I've tested with one of the management accounts and Java works without issue.

    It's becoming a major problem here because a part of the syllabus is written around Little Man Computer and YouSrc.

    One thought is that I'll try removing the sites from our authentication on Smoothwall, if a proxy could be the issue.

  9. #7
    Gongalong's Avatar
    Join Date
    Oct 2011
    Location
    United Kingdom
    Posts
    908
    Thank Post
    820
    Thanked 19 Times in 17 Posts
    Rep Power
    10
    Tried removing from authentication, and still crashes.

    - it doesn't appear to be Ranger
    - administrator accounts work with Java
    - both staff and student accounts crash IE when launching Java code e.g. Little Man Computer applet

    Aaaaaaaaaagh!

  10. #8
    themightymrp's Avatar
    Join Date
    Dec 2009
    Location
    Leeds, West Yorkshire
    Posts
    1,221
    Thank Post
    216
    Thanked 227 Times in 196 Posts
    Rep Power
    73
    Do you redirect Application Data via GPO? I've just checked in the Java control panel applet and it wants to save Temporary files to:

    %userprofile%\appdata\LocalLow\sun\java\deployment \cache

    Perhaps a redirected appdata may be the issue? Or maybe there is a way to centrally managed way to change this location to a folder on the machine which has modified permissions?

  11. Thanks to themightymrp from:

    Gongalong (13th February 2013)

  12. #9
    Gongalong's Avatar
    Join Date
    Oct 2011
    Location
    United Kingdom
    Posts
    908
    Thank Post
    820
    Thanked 19 Times in 17 Posts
    Rep Power
    10
    Yes, we do redirect to the file server. I've inherited the setup so not sure of the implications of changing it?...

  13. #10
    themightymrp's Avatar
    Join Date
    Dec 2009
    Location
    Leeds, West Yorkshire
    Posts
    1,221
    Thank Post
    216
    Thanked 227 Times in 196 Posts
    Rep Power
    73
    Does that above folder exist on the redirected appdata share on the server? If so you could try increasing domain user permissions on that cache folder to modify.

    When you log in as an admin, can you check in the java control panel where it want to save the temporary files? Does that point to a server share or a local folder?

  14. Thanks to themightymrp from:

    Gongalong (13th February 2013)

  15. #11
    Gongalong's Avatar
    Join Date
    Oct 2011
    Location
    United Kingdom
    Posts
    908
    Thank Post
    820
    Thanked 19 Times in 17 Posts
    Rep Power
    10
    Quote Originally Posted by themightymrp View Post
    Does that above folder exist on the redirected appdata share on the server? If so you could try increasing domain user permissions on that cache folder to modify.
    No, not on the server. I think because this is being stored as local appdata, rather than roaming appdata i.e. Java doesn't support roaming appdata.

    Quote Originally Posted by themightymrp View Post
    When you log in as an admin, can you check in the java control panel where it want to save the temporary files?
    It's pointing to C:\Users\username\AppData\LocalLow\Sun\Java\Deploy ment\cache

    You can turn off saving temporary files, but it seems to be a user specific setting, annoyingly.

    The US$64M question is how can I turn this off on mass? (assuming this is the issue)

  16. #12

    Join Date
    Feb 2013
    Posts
    8
    Thank Post
    2
    Thanked 1 Time in 1 Post
    Rep Power
    0
    Java and Internet Explorer crashing? Bit of a head scratcher, they're both normally rock solid.

  17. Thanks to BlueFlag from:

    Gongalong (22nd February 2013)

  18. #13
    Gongalong's Avatar
    Join Date
    Oct 2011
    Location
    United Kingdom
    Posts
    908
    Thank Post
    820
    Thanked 19 Times in 17 Posts
    Rep Power
    10
    Certainly hard to pin down.

    - it only happens to staff and student accounts
    - it doesn't seem to be related to Ranger (with Ranger uninstalled I still get the crash)
    - it doesn't happen on administrative accounts (which can see the C: drive in Windows Explorer)
    - it doesn't happen in Chrome or Mozilla

    Although I'm wondering if your comment is sarcastic now that I think about it :-)

SHARE:
+ Post New Thread

Similar Threads

  1. Random Quotes and facts list for MOTD
    By cjohnsonuk in forum Windows
    Replies: 1
    Last Post: 22nd January 2010, 02:37 PM
  2. Replies: 5
    Last Post: 13th August 2009, 12:56 PM
  3. Good quote...
    By tom_newton in forum General Chat
    Replies: 0
    Last Post: 16th October 2006, 11:38 AM
  4. IC Technology - sign an NDA for a quote?!
    By sahmeepee in forum Bad Experiences
    Replies: 7
    Last Post: 4th July 2006, 10:43 AM
  5. Quote of the day
    By NetworkGeezer in forum *nix
    Replies: 3
    Last Post: 5th May 2006, 09:49 AM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •