Hi Benoit,

This is in the openjpa log. Does that help?

26-Apr-2023 16:22:58.827 ERROR [elastic-3] 
reactor.util.Loggers$Slf4JLogger.error:314 - Scheduler worker in group main 
failed with an uncaught exception
java.lang.ExceptionInInitializerError: null
        at org.apache.mailet.Serializer$Registry.<clinit>(Serializer.java:78) 
~[apache-mailet-api-3.6.0.jar:3.6.0]
        at 
org.apache.mailet.AttributeValue.findSerializerAndDeserialize(AttributeValue.java:206)
 ~[apache-mailet-api-3.6.0.jar:3.6.0]
        at 
org.apache.mailet.AttributeValue.lambda$deserialize$1(AttributeValue.java:202) 
~[apache-mailet-api-3.6.0.jar:3.6.0]
        at java.util.Optional.flatMap(Optional.java:289) ~[?:?]
        at 
org.apache.mailet.AttributeValue.lambda$deserialize$2(AttributeValue.java:202) 
~[apache-mailet-api-3.6.0.jar:3.6.0]
        at java.util.Optional.flatMap(Optional.java:289) ~[?:?]
        at 
org.apache.mailet.AttributeValue.deserialize(AttributeValue.java:201) 
~[apache-mailet-api-3.6.0.jar:3.6.0]
        at java.util.Optional.flatMap(Optional.java:289) ~[?:?]
        at org.apache.mailet.AttributeValue.fromJson(AttributeValue.java:191) 
~[apache-mailet-api-3.6.0.jar:3.6.0]
        at 
org.apache.mailet.AttributeValue.fromJsonString(AttributeValue.java:175) 
~[apache-mailet-api-3.6.0.jar:3.6.0]
        at 
org.apache.james.queue.jms.JMSCacheableMailQueue.mailAttribute(JMSCacheableMailQueue.java:477)
 ~[james-server-queue-jms-3.6.0.jar:3.6.0]
        at 
org.apache.james.queue.jms.JMSCacheableMailQueue.lambda$populateMail$7(JMSCacheableMailQueue.java:462)
 ~[james-server-queue-jms-3.6.0.jar:3.6.0]
        at 
java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:273) ~[?:?]
        at 
java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) 
~[?:?]
        at 
java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
        at 
java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) 
~[?:?]
        at 
java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) 
~[?:?]
        at 
java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
        at 
java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[?:?]
        at 
org.apache.james.queue.jms.JMSCacheableMailQueue.populateMail(JMSCacheableMailQueue.java:463)
 ~[james-server-queue-jms-3.6.0.jar:3.6.0]
        at 
org.apache.james.queue.activemq.ActiveMQCacheableMailQueue.populateMail(ActiveMQCacheableMailQueue.java:122)
 ~[james-server-queue-activemq-3.6.0.jar:3.6.0]
        at 
org.apache.james.queue.jms.JMSCacheableMailQueue.createMail(JMSCacheableMailQueue.java:385)
 ~[james-server-queue-jms-3.6.0.jar:3.6.0]
        at 
org.apache.james.queue.activemq.ActiveMQCacheableMailQueue.createMailQueueItem(ActiveMQCacheableMailQueue.java:230)
 ~[james-server-queue-activemq-3.6.0.jar:3.6.0]
        at 
org.apache.james.queue.jms.JMSCacheableMailQueue.deQueueOneItem(JMSCacheableMailQueue.java:248)
 ~[james-server-queue-jms-3.6.0.jar:3.6.0]
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:44) 
~[reactor-core-3.4.2.jar:3.4.2]
        at 
reactor.core.publisher.FluxRepeatPredicate$RepeatPredicateSubscriber.resubscribe(FluxRepeatPredicate.java:119)
 ~[reactor-core-3.4.2.jar:3.4.2]
        at 
reactor.core.publisher.MonoRepeatPredicate.subscribeOrReturn(MonoRepeatPredicate.java:47)
 ~[reactor-core-3.4.2.jar:3.4.2]
        at 
reactor.core.publisher.InternalFluxOperator.subscribe(InternalFluxOperator.java:55)
 ~[reactor-core-3.4.2.jar:3.4.2]
        at 
reactor.core.publisher.FluxSubscribeOn$SubscribeOnSubscriber.run(FluxSubscribeOn.java:193)
 ~[reactor-core-3.4.2.jar:3.4.2]
        at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:84) 
[reactor-core-3.4.2.jar:3.4.2]
        at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:37) 
[reactor-core-3.4.2.jar:3.4.2]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
 [?:?]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) 
[?:?]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) 
[?:?]
        at java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field 
private final byte[] java.lang.String.value accessible: module java.base does 
not "opens java.lang" to unnamed module @3d5c822d
        at 
java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
 ~[?:?]
        at 
java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
 ~[?:?]
        at java.lang.reflect.Field.checkCanSetAccessible(Field.java:178) ~[?:?]
        at java.lang.reflect.Field.setAccessible(Field.java:172) ~[?:?]
        at 
org.nustaq.serialization.FSTClazzInfo.createFieldInfo(FSTClazzInfo.java:512) 
~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTClazzInfo.createFields(FSTClazzInfo.java:368) 
~[fst-2.57.jar:?]
        at org.nustaq.serialization.FSTClazzInfo.<init>(FSTClazzInfo.java:129) 
~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTClazzInfoRegistry.getCLInfo(FSTClazzInfoRegistry.java:129)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTClazzNameRegistry.addClassMapping(FSTClazzNameRegistry.java:98)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTClazzNameRegistry.registerClassNoLookup(FSTClazzNameRegistry.java:85)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTClazzNameRegistry.registerClass(FSTClazzNameRegistry.java:81)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTConfiguration.addDefaultClazzes(FSTConfiguration.java:807)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTConfiguration.initDefaultFstConfigurationInternal(FSTConfiguration.java:477)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTConfiguration.createDefaultConfiguration(FSTConfiguration.java:472)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTConfiguration.createMinBinConfiguration(FSTConfiguration.java:229)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTConfiguration.constructJsonConf(FSTConfiguration.java:319)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTConfiguration.createJsonConfiguration(FSTConfiguration.java:301)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTConfiguration.createJsonConfiguration(FSTConfiguration.java:290)
 ~[fst-2.57.jar:?]
        at 
org.nustaq.serialization.FSTConfiguration.createJsonConfiguration(FSTConfiguration.java:294)
 ~[fst-2.57.jar:?]
        at 
org.apache.mailet.Serializer$FSTSerializer.<clinit>(Serializer.java:512) 
~[apache-mailet-api-3.6.0.jar:3.6.0]
        ... 36 more

-----Original Message-----
From: Benoit TELLIER <btell...@apache.org>
Sent: 26 April 2023 00:59
To: server-user@james.apache.org
Subject: [EXT] Re: - Error while processing imap request

Hello Sean,

Which James server flavour are you using? (distributed, spring, guice-jpa, 
etc... )

Which version of James are you running>

ClosedChannelException in IMAP are unrelated to email delivery and fully 
harmless...

Best regards,

Benoit

On 25/04/2023 20:57, Sean McElroy wrote:
> Hello,
>
> I have a system that uses Apache James, and it has been functioning well 
> until a few days ago.
> It would appear that messages are being sent, but not delivered. I get no 
> exceptions in my code, but I see this in the James logs.
>
> 25-Apr-2023 14:29:39.880 WARN [imapserver-executor-12]
> org.apache.james.imapserver.netty.ImapChannelUpstreamHandler.exception
> Caught:143 - Error while processing imap request
> java.nio.channels.ClosedChannelException: null
>
> Any ideas, why this might be?
>
> Many thanks.
> Confidential Communication: The contents of this e-mail including any 
> attachment are confidential and intended solely for the person(s) to whom 
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> error, please notify the sender immediately and delete all copies from your 
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