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https://issues.apache.org/jira/browse/SLING-10273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17315748#comment-17315748
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Jakub Gorgolewski commented on SLING-10273:
-------------------------------------------
Looks like this exception might be the root cause of null value:
{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}
See
[https://github.com/apache/felix-dev/blob/master/converter/converter/src/main/java/org/osgi/util/converter/ConvertingImpl.java#L312]
That would explain why this issue manifests most frequently when list of nodes
with authentication requirement changes rapidly.
> Add null check in modifiedService for authReqPaths
> --------------------------------------------------
>
> Key: SLING-10273
> URL: https://issues.apache.org/jira/browse/SLING-10273
> Project: Sling
> Issue Type: Improvement
> Components: Authentication
> Affects Versions: Auth Core 1.5.0
> Reporter: Abhishek Garg
> Priority: Major
>
> Getting null pointer in SlingAuthenticatorListener on replication pages. in
> org.apache.sling.auth.core-1.5.0
> Exception in thread "pool-15-thread-1" java.lang.NullPointerException
> 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)
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