#2065 ✓resolved
Vadim Manikhin

False detect changes for application.conf

Reported by Vadim Manikhin | October 17th, 2016 @ 11:22 AM | in 1.4.4 (closed)

Framework version: 1.4.3
Platform you're using: Mac OSX 10.11.6

Reproduction steps:
* start play project in DEV mode Play logs error:
15:16:16,722 ERROR ~ Restart: Need to restart Play because /Users/user/Documents/workspace/webapp/conf/application.conf has been changed
java.lang.RuntimeException: Need to restart Play because /Users/user/Documents/workspace/webapp/conf/application.conf has been changed
at play.ConfigurationChangeWatcherPlugin.onConfigurationFileChanged(ConfigurationChangeWatcherPlugin.java:30) at play.ConfigurationChangeWatcherPlugin.detectChange(ConfigurationChangeWatcherPlugin.java:24) at play.plugins.PluginCollection.detectChange(PluginCollection.java:598) at play.Play.detectChanges(Play.java:641) at play.Invoker$Invocation.init(Invoker.java:199) at Invocation.HTTP Request(Play!)

I tried to debug this by adding breakpoints in ConfigurationChangeWatcherPlugin class in onConfigurationRead and detectChange methods. While being in debug error could not be reproduced. Error reproduces for me almost always when I run application using "run" command. Probably some kind of race conditions and detectChange called before configLastModified property initialized. In fact error does not prevent app from running. So I believe this is minor issue to fix.

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<h2>Play framework</h2>

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<h2>Creating a bug report</h2> Bug reports are incredibly helpful, so take time to report bugs and request features in our ticket tracker. We’re always grateful for patches to Play’s code. Indeed, bug reports with attached patches will get fixed far quickly than those without any.<br><br>

Please include as much relevant information as possible including the exact framework version you're using and a code snippet that reproduces the problem.<br><br>

Don't have too much expectations. Unless the bug is really a serious "everything is broken" thing, you're creating a ticket to start a discussion. Having a patch (or a branch on Github we can pull from) is better, but then again we'll only pull high quality branches that make sense to be in the core of Play.

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