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https://issues.apache.org/jira/browse/KARAF-5348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jean-Baptiste Onofré updated KARAF-5348:
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Fix Version/s: cellar-4.1.2
> Log redirected to Console, hangs until Ctrl+C pressed
> -----------------------------------------------------
>
> Key: KARAF-5348
> URL: https://issues.apache.org/jira/browse/KARAF-5348
> Project: Karaf
> Issue Type: Bug
> Components: karaf-shell
> Affects Versions: cellar-4.1.0
> Environment: Windows 10 x64
> Reporter: Lukasz Lech
> Assignee: Jean-Baptiste Onofré
> Priority: Major
> Fix For: cellar-4.1.2
>
>
> The issue is random. It happens from time to time, after starting Karaf.
> Everything starts fine, until my code invokes JPA and an attempt to create
> database connection is made. Than everything hangs.
> My attempts to locate the problem are listed here:
> https://stackoverflow.com/questions/45283937/eclipselink-hangs-while-creating-session-in-logging-subsystem
> I've located the hanging threads and I've found out, that it's the
> FileOutputStream.writeBytes method that hangs. It is invoked by
> EntityManager's attempt to log info.
> The solution was to restart karaf, because the error seemed to happen
> randomly every X starts. However, recently I've accidentally pressed Ctrl+C
> in console and the call unlocked, with the log message apearing onto console.
> It looks like, then, that it was the console that was blocking the call. I'm
> not sure if it's not caused by accidentally pressing some key in the moment
> the cmd window appear on screan and steals focus, however, anything blocking
> logging subsystem is a potential bug in production system.
> I haven't noticed that behaviour on linux (I launch Karaf in docker container
> there) but I can't state either the problem is limited to Windows. It seems
> to be random, anyway, so I have no strategy to replicate it.
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