# Disable jar hell **URL:** \ **Category:** Elasticsearch\ **Created:** [October 15, 2017, 5:05pm UTC](https://discuss.elastic.co/t/disable-jar-hell/104029 "2017-10-15T17:05:22Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![bendg25](https://avatars.discourse-cdn.com/v4/letter/b/57b2e6/32.png) [@bendg25](https://discuss.elastic.co/u/bendg25)\ **Post date:** [October 15, 2017, 5:05pm UTC](https://discuss.elastic.co/t/disable-jar-hell/104029/1 "2017-10-15T17:05:22Z")
Hi, Is there any way to disable jar hell? ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [October 15, 2017, 5:41pm UTC](https://discuss.elastic.co/t/disable-jar-hell/104029/2 "2017-10-15T17:41:11Z")
No. Why would you? You don't want to have JAR conflicts in your classpath, right? What is the problem you have? ---
**Author:** ![bendg25](https://avatars.discourse-cdn.com/v4/letter/b/57b2e6/32.png) [@bendg25](https://discuss.elastic.co/u/bendg25)\ **Post date:** [October 15, 2017, 7:03pm UTC](https://discuss.elastic.co/t/disable-jar-hell/104029/3 "2017-10-15T19:03:00Z")
I am running with Intellij 2017.2.5, build 172.4343.14: It appears to be an idea\_rt.jar conflict on the classpath (assuming I am reading the error right). Full stack trace at bottom. In terms of why I would want to disable it. Reason is _most_ jar conflicts don't result in major issues. When they do, they tend to throw exceptions anyway, and I am use to sorting these out myself. I can use mvn dependency:tree and exclude as neccesary. The trouble with having Jar Hell enabled in the ES project, in my opinion, is that it is a 'barrier to entry', it is something that causes people issues, when 90% of the time, the issues JarHell raises are not that important. In the same way, the official ES docker image has defaulted to having authentication switched on. I am not arguing that this is desirable for test/production, but for development, it makes devs deal with those concerns way before they actually need to. There could be a mode / profile for people to invoke jar hell if they faced any issues. Anyway, here is my stack trace: Caused by: java.lang.IllegalStateException: jar hell! duplicate jar [/Applications/IntelliJ IDEA.app/Contents/lib/idea\_rt.jar] on classpath: /Applications/IntelliJ IDEA.app/Contents/lib/idea\_rt.jar:/Applications/IntelliJ IDEA.app/Contents/plugins/junit/lib/junit-rt.jar:/Applications/IntelliJ IDEA.app/Contents/plugins/junit/lib/junit5-rt.jar:..../Users/bengill/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/8.5.15/tomcat-embed-websocket-8.5.15.jar:/Users/bengill/.m2/repository/org/springframework/spring-webmvc/4.3.9.RELEASE/spring-webmvc-4.3.9.RELEASE.jar:/Users/bengill/dev/flo/app-api/target/classes:/Users/bengill/dev/flo/shared/target/classes:/Users/bengill/dev/flo/search-api/target/classes:/Applications/IntelliJ IDEA.app/Contents/lib/idea\_rt.jar at org.elasticsearch.bootstrap.JarHell.parseClassPath(JarHell.java:142) at org.elasticsearch.bootstrap.JarHell.parseClassPath(JarHell.java:99) at org.elasticsearch.bootstrap.JarHell.checkJarHell(JarHell.java:90) at org.elasticsearch.bootstrap.BootstrapForTesting.(BootstrapForTesting.java:89) ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [October 15, 2017, 7:20pm UTC](https://discuss.elastic.co/t/disable-jar-hell/104029/4 "2017-10-15T19:20:35Z")
Read [https://github.com/elastic/elasticsearch/blob/master/CONTRIBUTING.md](https://github.com/elastic/elasticsearch/blob/master/CONTRIBUTING.md) There is a chapter regarding this. HTH ---
**Author:** ![bendg25](https://avatars.discourse-cdn.com/v4/letter/b/57b2e6/32.png) [@bendg25](https://discuss.elastic.co/u/bendg25)\ **Post date:** [October 16, 2017, 4:56am UTC](https://discuss.elastic.co/t/disable-jar-hell/104029/5 "2017-10-16T04:56:38Z")
Thanks David, That has solved that problem. Then I hit jarhell due to logging libraries (had to exlcude commons-logging), now I am onto another jarhell issue as I happen to have a duplicate Q generated class due to the way some of my persistent domain modules are structured, so even through this is completely harmless, I have to work out how to stop it generating Q classes on pom dependency modules. This is why I dislike jarhell so much. ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [October 16, 2017, 5:13am UTC](https://discuss.elastic.co/t/disable-jar-hell/104029/6 "2017-10-16T05:13:13Z")
Yeah. It’s annoying.... Until you discover that it’s going to protect yourself from doing bad things like: > 😉 ---
**Author:** ![bendg25](https://avatars.discourse-cdn.com/v4/letter/b/57b2e6/32.png) [@bendg25](https://discuss.elastic.co/u/bendg25)\ **Post date:** [October 16, 2017, 5:34am UTC](https://discuss.elastic.co/t/disable-jar-hell/104029/7 "2017-10-16T05:34:43Z")
I have progressed: 1. Exclude mysema 2. securemock collision 3. Downgrade junit to 4.11 4. exclude hamcrest-core But still have: ```auto ERROR StatusLogger Log4j2 could not find a logging implementation. Please add log4j-core to the classpath. Using SimpleLogger to log to the console... java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "accessDeclaredMembers") at java.security.AccessControlContext.checkPermission(AccessControlContext.java:472) at java.security.AccessController.checkPermission(AccessController.java:884) at java.lang.SecurityManager.checkPermission(SecurityManager.java:549) at java.lang.Class.checkMemberAccess(Class.java:2348) at java.lang.Class.getDeclaredMethods(Class.java:1974) at org.junit.internal.MethodSorter.getDeclaredMethods(MethodSorter.java:54) at org.junit.runners.model.TestClass.(TestClass.java:45) at com.carrotsearch.randomizedtesting.RandomizedRunner$12.run(RandomizedRunner.java:1053) at com.carrotsearch.randomizedtesting.RandomizedRunner$12.run(RandomizedRunner.java:1050) at java.security.AccessController.doPrivileged(Native Method) at com.carrotsearch.randomizedtesting.RandomizedRunner.getAnnotatedFieldValues(RandomizedRunner.java:1050) at com.carrotsearch.randomizedtesting.RandomizedRunner.withClassRules(RandomizedRunner.java:885) at com.carrotsearch.randomizedtesting.RandomizedRunner.runSuite(RandomizedRunner.java:674) at com.carrotsearch.randomizedtesting.RandomizedRunner.access$200(RandomizedRunner.java:140) at com.carrotsearch.randomizedtesting.RandomizedRunner$2.run(RandomizedRunner.java:598) Test ignored. Test ignored. Test ignored. Test ignored. REPRODUCE WITH: gradle null -Dtests.seed=E95D0993190E9325 -Dtests.class=com.sparksdev.flo.search.service.SearchIT -Dtests.locale=en-GB -Dtests.timezone=Europe/London NOTE: Mac OS X 10.12.6 x86_64/Oracle Corporation 1.8.0_144 (64-bit)/cpus=8,threads=1,free=287936064,total=324534272 NOTE: All tests run in this JVM: [SearchIT] Exception in thread "Thread-1" java.lang.ClassCastException: org.apache.logging.log4j.simple.SimpleLoggerContext cannot be cast to org.apache.logging.log4j.core.LoggerContext at org.elasticsearch.test.ESTestCase.lambda$static$0(ESTestCase.java:171) at java.lang.Thread.run(Thread.java:748) Suppressed: java.security.AccessControlException: access denied ("org.elasticsearch.ThreadPermission" "modifyArbitraryThreadGroup") at java.security.AccessControlContext.checkPermission(AccessControlContext.java:472) at java.security.AccessController.checkPermission(AccessController.java:884) at java.lang.SecurityManager.checkPermission(SecurityManager.java:549) at org.elasticsearch.SecureSM.checkThreadGroupAccess(SecureSM.java:194) at org.elasticsearch.SecureSM.checkAccess(SecureSM.java:141) at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:315) at java.lang.ThreadGroup.getParent(ThreadGroup.java:167) at com.carrotsearch.randomizedtesting.RandomizedContext.context(RandomizedContext.java:240) at com.carrotsearch.randomizedtesting.RandomizedContext.current(RandomizedContext.java:134) at com.carrotsearch.randomizedtesting.RandomizedRunner.augmentStackTrace(RandomizedRunner.java:1848) at com.carrotsearch.randomizedtesting.RunnerThreadGroup.uncaughtException(RunnerThreadGroup.java:20) at java.lang.Thread.dispatchUncaughtException(Thread.java:1959) Process finished with exit code 255 ``` ---
**Author:** ![bendg25](https://avatars.discourse-cdn.com/v4/letter/b/57b2e6/32.png) [@bendg25](https://discuss.elastic.co/u/bendg25)\ **Post date:** [October 16, 2017, 5:54am UTC](https://discuss.elastic.co/t/disable-jar-hell/104029/8 "2017-10-16T05:54:05Z")
I have it working now, reverting back to using this worked for me: ```auto @RunWith(com.carrotsearch.randomizedtesting.RandomizedRunner.class) @ContextConfiguration(classes = { SearchTestSpringConfig.class } ) @ThreadLeakScope(ThreadLeakScope.Scope.NONE) public class SearchIT extends ESTestCase { ``` (rather than using `ESIntegTestCase`). That was harder than it should have been! ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [October 16, 2017, 6:06am UTC](https://discuss.elastic.co/t/disable-jar-hell/104029/9 "2017-10-16T06:06:01Z")
Please format your code using `` icon as explained in [this guide](https://discuss.elastic.co/t/about-the-elasticsearch-category/21). It will make your post more readable. Or use markdown style like: ```` ``` CODE ``` ```` I edited your posts. > That was harder than it should have been! Hard to say. I don't really know what you are doing. Building a plugin may be? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 13, 2017, 6:06am UTC](https://discuss.elastic.co/t/disable-jar-hell/104029/10 "2017-11-13T06:06:09Z")
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