logback / LOGBACK-1551 [Open] Logback throws ConcurrentModificationException at cancelScheduledTasks ============================== Here's what changed in this issue in the last few minutes. This issue has been created This issue is now assigned to you. View or comment on issue using this link https://jira.qos.ch/browse/LOGBACK-1551 ============================== Issue created ------------------------------ Dmytro Lisnichenko created this issue on 15/Feb/21 4:58 PM Summary: Logback throws ConcurrentModificationException at cancelScheduledTasks Issue Type: Bug Affects Versions: 1.2.3 Assignee: Logback dev list Components: logback-classic Created: 15/Feb/21 4:58 PM Priority: Major Reporter: Dmitrius Listo Description: Faced that once when the system was being terminated:  \{code} 17:48:37,185 |-INFO in ch.qos.logback.core.hook.DelayingShutdownHook@6aeb7f97 - Sleeping for 0 milliseconds17:48:37,185 |-INFO in ch.qos.logback.core.hook.DelayingShutdownHook@6aeb7f97 - Sleeping for 0 milliseconds17:48:37,185 |-INFO in ch.qos.logback.core.hook.DelayingShutdownHook@54c45654 - Sleeping for 0 milliseconds17:48:37,185 |-INFO in ch.qos.logback.core.hook.DelayingShutdownHook@54c45654 - Logback context being closed via shutdown hook17:48:37,185 |-INFO in ch.qos.logback.core.hook.DelayingShutdownHook@6aeb7f97 - Logback context being closed via shutdown hook17:48:37,185 |-INFO in ch.qos.logback.classic.jmx.JMXConfigurator(default) - onReset() method called JMXActivator [ch.qos.logback.classic:Name=default,Type=ch.qos.logback.classic.jmx.JMXConfigurator]Exception in thread "Logback shutdown hook [default]" java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:911) at java.util.ArrayList$Itr.next(ArrayList.java:861) at ch.qos.logback.classic.LoggerContext.cancelScheduledTasks(LoggerContext.java:232) at ch.qos.logback.classic.LoggerContext.reset(LoggerContext.java:225) at ch.qos.logback.classic.LoggerContext.stop(LoggerContext.java:348) at ch.qos.logback.core.hook.ShutdownHookBase.stop(ShutdownHookBase.java:39) at ch.qos.logback.core.hook.DelayingShutdownHook.run(DelayingShutdownHook.java:57) at java.lang.Thread.run(Thread.java:748) Process finished with exit code 1 {code} ============================== This message was sent by Atlassian Jira (v8.8.0#808000-sha1:e2c7e59)