logback / LOGBACK-1644 [Open] ch.qos.logback.core.sift.SiftingAppenderBase#stop method reports NullPointerException ============================== 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-1644 ============================== Issue created ------------------------------ Changjun Xiao created this issue on 14/Jun/22 11:35 AM Summary: ch.qos.logback.core.sift.SiftingAppenderBase#stop method reports NullPointerException Issue Type: Bug Affects Versions: 1.2.11, 1.3.0-alpha16 Assignee: Logback dev list Attachments: SiftingAppenderBase-NullPointerException.txt Components: logback-core Created: 14/Jun/22 11:35 AM Environment: jdk1.8.0_192 CentOS Linux release 7.3.1611 Labels: siftingAppender Priority: Major Reporter: Changjun Xiao Description: The `ch.qos.logback.core.sift.SiftingAppenderBase#stop` method lacks `isStarted()` judgment. If this method is called without `start()`, a `NullPointerException` will be reported because `appenderTracker` is not initialized. It can be solved by adding `isStarted()` judgment. ============================== This message was sent by Atlassian Jira (v8.8.0#808000-sha1:e2c7e59)