Karaf 4.3.6
Setting a configuration parameter to null throws a NullPointerException. The
specification,
https://docs.osgi.org/specification/osgi.cmpn/7.0.0/service.configurator.html,
is silent on the use of null as a property value, but includes the following
"If a requested conversion cannot be performed, then the configuration is not
processed and the Configurator implementation should log an error."; in
addition the configuration parameter are stored in a Dictionary structure which
requires a non-null key and non-null value.
Although the json format supports 'null' as value and OSGi confutation appears
to required non-null values, should Karaf log something like "Null value for
<Property Name> not supported." instead of throwing a NPE?
***
* Thrown exception
***
java.lang.NullPointerException: null
at
org.apache.karaf.config.core.impl.JsonConfigInstaller.setConfig(JsonConfigInstaller.java:87)
~[?:?]
at
org.apache.karaf.config.core.impl.JsonConfigInstaller.update(JsonConfigInstaller.java:66)
~[?:?]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.update(DirectoryWatcher.java:1117)
[!/:3.7.4]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.update(DirectoryWatcher.java:919)
[!/:3.7.4]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.doProcess(DirectoryWatcher.java:488)
[!/:3.7.4]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:365)
[!/:3.7.4]
at
org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:316)
[!/:3.7.4]
***
* etc/foo.json
***
{
"myNullValue":null
}
Paul Spencer
