hi folks, I'm trying to run a Spark Scala job using Toree and I'm running into some issues as the code in our job calls into one of our libraries which tries to create threads in its own ThreadGroup: https://github.com/twitter/util/blob/develop/util-core/src/main/scala/com/twitter/concurrent/NamedPoolThreadFactory.scala#L28
This seems to cause this check in Toree's KernelSecurityManager to trip: https://github.com/apache/incubator-toree/blob/master/kernel-api/src/main/scala/org/apache/toree/security/KernelSecurityManager.scala#L121 Stack looks like: Name: java.lang.SecurityException Message: Not allowed to modify ThreadGroups! StackTrace: at org.apache.toree.security.KernelSecurityManager.checkAccess(KernelSecurityManager.scala:114) at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:315) at java.lang.Thread.init(Thread.java:394) at java.lang.Thread.init(Thread.java:349) at java.lang.Thread.<init>(Thread.java:599) at com.twitter.concurrent.NamedPoolThreadFactory.newThread(NamedPoolThreadFactory.scala:32) ... Here's a simple repro: println(Thread.currentThread().getThreadGroup) // default thread groupval group: ThreadGroup = new ThreadGroup(Thread.currentThread().getThreadGroup(), "name") val hello = new Thread(group, new Runnable { def run() { println("hello world") } }) println(hello.getThreadGroup) hello.start Any suggestions for working around this? (TOREE-421 <https://issues.apache.org/jira/browse/TOREE-421>) Thanks, -- - Piyush
