org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: javax/ mail/MessagingException | 8 months ago
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    samebug tip
    org.apache.http.config.Lookup class is in httpcore-4.3.jar not in httpclient-4.3.1.jar
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    samebug tip
    Upgrade play-plugins-redis to play-modules-redis. You may have to delete com.typesafe.plugin.RedisPlugin from play.plugins
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    samebug tip
    You might have to readd your libraries if you just upgraded intelliJ. Try readding the netty library to the SDK.
    via GitHub by EBatTiVo
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    Trying to send a mail | SpigotMC - High Performance Minecraft | 8 months ago
    org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: javax/ mail/MessagingException
  6. 0

    Monitor and get alerts for your workflows with the Oozie SLAs | Hue - Hadoop User Experience - The Apache Hadoop UI | 1 year ago
    java.lang.NoClassDefFoundError: javax/mail/MessagingException

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Root Cause Analysis

  1. java.lang.NoClassDefFoundError


    at java.lang.Class.forName0()
  2. Java RT
    1. java.lang.Class.forName0(Native Method)[?:1.8.0_66]
    2. java.lang.Class.forName(Unknown Source)[?:1.8.0_66]
    2 frames