[KARAF-7435] Setting a configuration parameter to null throws an NPE.

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 4.3.6
• Component/s: karaf
• Assignee: Unassigned
• Reporter: Paul Spencer
• Created: 16/May/22 18:57
• Updated: 16/May/22 18:59

Description

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 }