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https://issues.apache.org/jira/browse/FELIX-6393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17321930#comment-17321930
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Jean-Baptiste Onofré commented on FELIX-6393:
---------------------------------------------
Just got the same report on Karaf:
{code:java}
On Karaf 4.3.0 I see the following error logged every few milliseconds:
2021-04-14T08:09:13,749 | ERROR | fileinstall-/[KARAF_HOME]/deploy |
fileinstall | 15 - org.apache.felix.fileinstall - 3.6.8 |
In main loop, we have serious troublejava.lang.NullPointerException: null
at
org.apache.felix.fileinstall.internal.Scanner.processFiles(Scanner.java:158)
~[!/:3.6.8] at
org.apache.felix.fileinstall.internal.Scanner.scan(Scanner.java:131)
~[!/:3.6.8] at
org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:311)
[!/:3.6.8]
It looks like this can happen on a system that has too few file handles
configured. The Felix DirectoryWatcher then use a Scanner instead of a
WatcherScanner implementation.Scanner doesn’t have a null check for the file
filter object, and the deploy fileinstall configuration
(org.apache.felix.fileinstall-deploy.cfg) does not define a filter, giving the
NPEs.It looks like it should also be possible to reproduce this error by
configuring the watcher property felix.fileinstall.disableNio2. I will look
into addressing this by increasing the account’s available file handles, but I
was wondering if there should be additional protection in Karaf (by setting a
filter) or Felix (guarding against the NPE)? {code}
I will improve this.
> FileInstall | In main loop, we have serious trouble |
> java.lang.NullPointerException: null
> ------------------------------------------------------------------------------------------
>
> Key: FELIX-6393
> URL: https://issues.apache.org/jira/browse/FELIX-6393
> Project: Felix
> Issue Type: Bug
> Components: File Install
> Affects Versions: fileinstall-3.6.8
> Reporter: Rakesh Kumar
> Assignee: Jean-Baptiste Onofré
> Priority: Critical
>
> I was trying to configure the Felix file install and after the configuration
> in Felix WebConsole is done I placed a bundle in configured load directory
> and it went into an endless exceptions.
> I had to kill the server to get over it.
> Here is the exception trace.
> {code:java}
> 2021-03-07 06:36:09.942 [FelixLogListener] ERROR
> com.adeptj.modules.commons.logging.osgi.Logger - In main loop, we have
> serious trouble
> java.lang.NullPointerException: null
> at
> org.apache.felix.fileinstall.internal.Scanner.processFiles(Scanner.java:158)
> at org.apache.felix.fileinstall.internal.Scanner.scan(Scanner.java:131)
> at
> org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:311)
> {code}
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