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Plugin fails to deploy with error in app server log, "Cannot open JAR file for reading"


A plugin fails to deploy, and the application server log shows the following error:

[Appian Plugin Hot Deploy] ERROR com.appiancorp.plugins.LoggingPluginEventListener - Failed to load Plug-in '<Plugin Name>.jar' (<Plugin Name>.jar) version 0.0: 'Cannot open JAR file for reading: <Path to plugin>/<Plugin name>.jar'


Cause 1

Cause 2




Affected Versions

This article applies to all versions of Appian.