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Thread: Access control exception - access denied

  1. #1
    Junior Member
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    Jun 2019
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    Default Access control exception - access denied

    Hi Everyone,

    I have a server and I need to remote control through Java based application.
    In the Java console I see this info:

    Java Plug-in x86
    Using JRE version 1.8.0_181-b13 Java HotSpot(TM) Client VM
    User home directory = C:\Users\ETVKX

    Unfortunately due to errors this is impossible:

    1. At first there is Java Application blocked error (ApplicationBlocked.jpg)
    - adding the presented URL to the Java exception list solves (probably) the problem as I see new errors as described in next point.

    2. Next I receive two different errors:
    a) AccessControlException for FilePermission (accessdenied.png)
    b) AccessControlException for PropertyPermission (mcs.debug.error)

    I added the three below lines in the java.policy file to avoid the errors:
    permission java.net.SocketPermission ", "connect";
    permission java.util.PropertyPermission "mcs.debug", "read";
    permission java.io.FilePermission "C:\Users\ETVKX\IBM\", "read";

    But I still receive the same two errors presented in point 2.

    - What is "mcs.debug" ? Is this Java related?
    - Is the syntax correct that I am using inside java policy file?
    - What additional policies I can use to avoid the errors?

    Any help would be useful for me as I am struggling for more than month now. Thx.

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  3. #2
    Super Moderator Norm's Avatar
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    Default Re: Access control exception - access denied

    I haven't worked with Security settings for a while. It would take me a while to setup a test, but I don't have a remote site.

    I remember having to add lines to an Exception List:
    Java icon in Control Panel
    Web Settings tab
    Exception Site List
    add a line like the following to the list:
    A sample .policy file entry:
    grant codeBase "" {
      permission java.io.FilePermission "<<ALL FILES>>", "write";
    grant codeBase "file:/D:/JavaDevelopment/Testing/WriteFile/-" {
      permission java.io.FilePermission "C:\\Temp\\writetest.txtXXXX", "read, write";
      permission java.io.FilePermission "D:\\Testing\\writetest.txt", "read, write";
    If you don't understand my answer, don't ignore it, ask a question.

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