Andrew Grande created MINIFI-128:
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Summary: NPE if nifi.minifi.notifier.file.config.path wasn't
configured
Key: MINIFI-128
URL: https://issues.apache.org/jira/browse/MINIFI-128
Project: Apache NiFi MiNiFi
Issue Type: Bug
Environment: current master branch build
Reporter: Andrew Grande
Priority: Minor
When enabling a FileChangeNotifier, it's easy to forget uncommenting the
*nifi.minifi.notifier.file.config.path* property (required). Minifi restart
will throw an unfriendly error:
{noformat}
Exception in thread "main" java.lang.IllegalArgumentException: Property,
nifi.minifi.notifier.file.config.path, for the path of the config file must be
specified.
at
org.apache.nifi.minifi.bootstrap.configuration.notifiers.FileChangeNotifier.initialize(FileChangeNotifier.java:154)
at
org.apache.nifi.minifi.bootstrap.RunMiNiFi.initializeNotifiers(RunMiNiFi.java:1452)
at org.apache.nifi.minifi.bootstrap.RunMiNiFi.start(RunMiNiFi.java:1116)
at org.apache.nifi.minifi.bootstrap.RunMiNiFi.main(RunMiNiFi.java:224)
Initiating shutdown of bootstrap change notifiers...
Exception in thread "Thread-2" java.lang.NullPointerException
at
java.util.Collections$UnmodifiableCollection.<init>(Collections.java:1026)
at java.util.Collections$UnmodifiableSet.<init>(Collections.java:1128)
at java.util.Collections.unmodifiableSet(Collections.java:1118)
at
org.apache.nifi.minifi.bootstrap.RunMiNiFi.getChangeNotifiers(RunMiNiFi.java:1438)
at
org.apache.nifi.minifi.bootstrap.ShutdownHook.run(ShutdownHook.java:57)
{noformat}
Expected: improve the error message to be meaningful and suggest the user
configure the property. No stacktrace, as we know what's going on exactly.
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