[logback-dev] [JIRA] Updates for LOGBACK-1644: ch.qos.logback.core.sift.SiftingAppenderBase#stop method reports NullPointerException

[QOS.CH (JIRA)]

logback / LOGBACK-1644 [Open]
ch.qos.logback.core.sift.SiftingAppenderBase#stop method reports NullPointerException

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https://jira.qos.ch/browse/LOGBACK-1644

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 Issue created
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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.


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