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Issue with CACERTS IntelliJ + Gradle

I currently am running some REST calls behind a proxy, so I need to follow some strict processes in order for the calls to go through.

Previously I was building in Eclipse for a POC, but now that I know it works, I am trying to transfer it over to IntelliJ (Personal favorite IDEA) along with Gradle for the build automation.

I got the project to compile, export all the dependencies, etc… but when I run it IN IntelliJ I get a “Cert not found error”. On a side note however, if I execute the compiled Jar file (from gradle) using “java-jar MyJar.jar”, it runs perfectly and doesn’t throw the cert error. The kicker here is, if I execute the Jar using JUST the gradle task outside of IntelliJ it works, but if I try to execute the task right after the build in IntelliJ it fails.


  • Executing the jar created from Gradle build task manually VIA CLI
  • Executing the gradle task below using “gradle runMain” VIA CLI

Doesn’t work: – Executing the build task within IntelliJ and calling “runMain” at the end of the build task

My current theory, is that running it via java -jar and gradle runMain, causes the JVM to use the default cacerts “/jre_xxx/libs/security/cacerts” (where I already added the certificate) but when I execute the Jar within IntelliJ with Gradle, it uses a different location. I’ve also added the cert to “C:Program FilesJetBrainsIntelliJ IDEA Community Edition 2018.1.5jre64libsecuritycacerts” as well but I still recieved this eror while running it in IntelliJ.

task(runMain, dependsOn: 'classes', type: JavaExec) {
     main = ''
     classpath = sourceSets.main.runtimeClasspath

Running this VIA CLI seems to work but never with the Gradle build task within IntelliJ.

Any help would be greatly appreciated.

EDIT: The error that I get ONLY while running it within IntelliJ (PKIX path building failed: unable to find valid certification path to requested target)



After contacting JetBrains support with my issue, I was made aware of the problem. Logically I was under the assumption that the JRE would execute the JAR file, this is ONLY the case when running java -jar my.jar or executing Gradle from CLI. The way IntelliJ works is that it solely uses the JDK, so I had to modify the small JRE that was within the JDK. Once I did that and added it to the CACERTS found within my, I was able to resolve this issue.

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