# Java Error: Failed to validate certificate **URL:** \ **Category:** Ignition\ **Created:** [May 17, 2012, 11:34am UTC](https://forum.inductiveautomation.com/t/java-error-failed-to-validate-certificate/4487 "2012-05-17T11:34:06Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![mtedford](https://avatars.discourse-cdn.com/v4/letter/m/ea666f/32.png) [@mtedford](https://forum.inductiveautomation.com/u/mtedford)\ **Post date:** [May 17, 2012, 11:34am UTC](https://forum.inductiveautomation.com/t/java-error-failed-to-validate-certificate/4487/1 "2012-05-17T11:34:06Z")
Failed to validate certificate. The application will not be executed. java.security.cert.CertificateException: java.security.cert.CertPathValidatorException: java.security.InvalidKeyException: Wrong key usage I received this error on a few of my machines after upgrading to 7.4.2 yesterday. Some are running java 6.18 up through 7.04. The only fix seems to be uninstalling java and reinstalling. I tried deleting the cache and the stored certificates but it did not work. Has any one seen this before or know of a proper fix? ---
**Author:** ![Carl.Gould](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/carl.gould/32/7262_2.png) [@Carl.Gould](https://forum.inductiveautomation.com/u/Carl.Gould)\ **Post date:** [May 22, 2012, 8:46pm UTC](https://forum.inductiveautomation.com/t/java-error-failed-to-validate-certificate/4487/2 "2012-05-22T20:46:01Z")
Well, we updated the cert for java web start on 7.4, but only a very few customers are seeing this. Not sure what’s causing it. Which cache did you delete? ---
**Author:** ![Cas](https://avatars.discourse-cdn.com/v4/letter/c/77aa72/32.png) [@Cas](https://forum.inductiveautomation.com/u/Cas)\ **Post date:** [June 6, 2012, 2:17pm UTC](https://forum.inductiveautomation.com/t/java-error-failed-to-validate-certificate/4487/3 "2012-06-06T14:17:35Z")
I have seen the same thing at some of my client computers. Downloading and installing the most recent version of Java seems to fix the issue. I’m not certain, but I think it’s only happening on the machines where I set up a direct link shortcut, as described in this thread: [viewtopic.php?f=70&t=4919](http://www.inductiveautomation.com/forum/viewtopic.php?f=70&t=4919) Carl, do you think that direct link shortcut could be the issue? Cas ---
**Author:** ![Travis.Cox](https://avatars.discourse-cdn.com/v4/letter/t/b9bd4f/32.png) [@Travis.Cox](https://forum.inductiveautomation.com/u/Travis.Cox)\ **Post date:** [June 6, 2012, 2:45pm UTC](https://forum.inductiveautomation.com/t/java-error-failed-to-validate-certificate/4487/4 "2012-06-06T14:45:09Z")
I doubt it has anything to do with the direct link. It is something with Java’s cache. Did you try deleting Java’s cache? ---
**Author:** ![Cas](https://avatars.discourse-cdn.com/v4/letter/c/77aa72/32.png) [@Cas](https://forum.inductiveautomation.com/u/Cas)\ **Post date:** [June 6, 2012, 3:17pm UTC](https://forum.inductiveautomation.com/t/java-error-failed-to-validate-certificate/4487/5 "2012-06-06T15:17:54Z")
No, I’m not at the client’s location anymore, so the simpler thing to ask them to try was the update of Java. That worked, so I moved on to other things… ---
**Author:** ![roizundak](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/roizundak/32/4430_2.png) [@roizundak](https://forum.inductiveautomation.com/u/roizundak)\ **Post date:** [November 25, 2022, 8:04am UTC](https://forum.inductiveautomation.com/t/java-error-failed-to-validate-certificate/4487/6 "2022-11-25T08:04:18Z")
Open the Java Control Panel: 1. Go to Start menu Start Configure Java 2. Go to the Advanced tab \> **Security** \> **General**. 3. Uncheck the option: " **Enable online certificate validation**". 4. Check the option: " **Enable list of trusted publishers**".