Andrea-Campanella edited a comment on pull request #53:
URL: https://github.com/apache/felix-dev/pull/53#issuecomment-704996029
I can confirm that the filter being null in the
`andreacampanella/voltha-onos:felix-fix` is the culprit of the NPE I was seeing
in my karaf 4.2.9 deployment
```
2020-10-07T15:13:23,789 | ERROR |
fileinstall-/root/onos/apache-karaf-4.2.9/deploy | fileinstall
| 10 - org.apache.felix.fileinstall - 3.6.6 | In main loop, we have serious
trouble
java.lang.NullPointerException: null
at
org.apache.felix.fileinstall.internal.Scanner.processFiles(Scanner.java:158)
~[!/:3.6.6]
at
org.apache.felix.fileinstall.internal.Scanner.scan(Scanner.java:131) ~[!/:3.6.6]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:311)
[!/:3.6.6]
```
adding the following line `felix.fileinstall.filter=*.jar` to the file
removes the NPE by ensuring the filter is never null.
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