[jira] [Resolved] (FELIX-6402) ConcurrentModificationException results in null value while converting to an array

["A. J. David Bosschaert (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FELIX-6402?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

A. J. David Bosschaert resolved FELIX-6402.
-------------------------------------------
    Resolution: Fixed

> ConcurrentModificationException results in null value while converting to an array
> ----------------------------------------------------------------------------------
>
>                 Key: FELIX-6402
>                 URL: https://issues.apache.org/jira/browse/FELIX-6402
>             Project: Felix
>          Issue Type: Bug
>          Components: Converter
>    Affects Versions: converter-1.0.14
>            Reporter: Carsten Ziegeler
>            Priority: Minor
>             Fix For: converter-1.0.18
>
>
> As reported in SLING-10273 it sometimes happens that a conversion to a String[] results in "null" to be returned by the converter. According to the spec, a converter will always return a String array (might be empty).
> This got traced down in the issue to a ConcurrentModificationException (see below) which is catched at [1] and then null is returned.
> It is probably better to raise a ConversionException in this case to make the problem known to the caller - and also avoiding the unexpected null return value
> [1] https://github.com/apache/felix-dev/blob/master/converter/converter/src/main/java/org/osgi/util/converter/ConvertingImpl.java#L312
> {noformat}
> java.util.ConcurrentModificationException
>         at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1493)
>         at java.base/java.util.HashMap$KeyIterator.next(HashMap.java:1516)
>         at org.osgi.util.converter.ConvertingImpl.convertToArray(ConvertingImpl.java:306)
>         at org.osgi.util.converter.ConvertingImpl.to(ConvertingImpl.java:207)
>         at org.osgi.util.converter.CustomConverterImpl$ConvertingWrapper.to(CustomConverterImpl.java:183)
>         at org.osgi.util.converter.CustomConverterImpl$ConvertingWrapper.to(CustomConverterImpl.java:151)
>         at org.osgi.util.converter.CustomConverterImpl$ConvertingWrapper.to(CustomConverterImpl.java:139)
>         at org.apache.sling.auth.core.impl.SlingAuthenticatorServiceListener.modifiedService(SlingAuthenticatorServiceListener.java:369)
>         at org.apache.sling.auth.core.impl.SlingAuthenticatorServiceListener.process(SlingAuthenticatorServiceListener.java:280)
>         at org.apache.sling.auth.core.impl.SlingAuthenticatorServiceListener.processQueue(SlingAuthenticatorServiceListener.java:257)
>         at org.apache.sling.auth.core.impl.SlingAuthenticatorServiceListener.lambda$schedule$0(SlingAuthenticatorServiceListener.java:166)
>         at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
>         at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
>         at java.base/java.lang.Thread.run(Thread.java:834)
> {noformat}



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