Benoit Tellier created JAMES-3828:
-------------------------------------
Summary: ava.lang.ClassCastException: class [B cannot be cast to
class org.apache.mailet.AttributeValue ([B is in module java.base of loader
'bootstrap'; org.apache.mailet.AttributeValue is in unnamed module of loader
'app')
Key: JAMES-3828
URL: https://issues.apache.org/jira/browse/JAMES-3828
Project: James Server
Issue Type: Bug
Components: Mailet Contributions
Affects Versions: master
Reporter: Benoit Tellier
Fix For: 3.8.0
Got the following error today
{code:java}
exception java.lang.ClassCastException: class [B cannot be cast to class
org.apache.mailet.AttributeValue ([B is in module java.base of loader
'bootstrap'; org.apache.mailet.AttributeValue is in unnamed module of loader
'app')
at
org.apache.mailet.Serializer$MapSerializer.lambda$serialize$0(Serializer.java:507)
at
com.google.common.collect.CollectCollectors.lambda$toImmutableMap$6(CollectCollectors.java:185)
at java.base/java.util.stream.ReduceOps$3ReducingSink.accept(Unknown Source)
at
java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Unknown
Source)
at java.base/java.util.stream.AbstractPipeline.copyInto(Unknown Source)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown
Source)
at
java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source)
at java.base/java.util.stream.AbstractPipeline.evaluate(Unknown Source)
at java.base/java.util.stream.ReferencePipeline.collect(Unknown Source)
at
org.apache.mailet.Serializer$MapSerializer.serialize(Serializer.java:507)
at
org.apache.mailet.Serializer$MapSerializer.serialize(Serializer.java:503)
at org.apache.mailet.AttributeValue.toJson(AttributeValue.java:256)
at
org.apache.mailet.AttributeValue.duplicate(AttributeValue.java:250)
at org.apache.mailet.Attribute.duplicate(Attribute.java:62)
at
java.base/java.util.stream.ReferencePipeline$3$1.accept(Unknown Source)
at
java.base/java.util.HashMap$ValueSpliterator.forEachRemaining(Unknown Source)
at
java.base/java.util.stream.AbstractPipeline.copyInto(Unknown Source)
at
java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
at
java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source)
at
java.base/java.util.stream.AbstractPipeline.evaluate(Unknown Source)
at
java.base/java.util.stream.ReferencePipeline.collect(Unknown Source)
at
org.apache.james.server.core.MailImpl.duplicateAttributes(MailImpl.java:117)
at
org.apache.james.server.core.MailImpl.duplicateWithoutMessage(MailImpl.java:111)
at
org.apache.james.server.core.MailImpl.duplicate(MailImpl.java:97)
at
org.apache.james.mailetcontainer.impl.MatcherSplitter.split(MatcherSplitter.java:149)
at
org.apache.james.mailetcontainer.impl.MailetProcessorImpl.lambda$executeProcessingStep$3(MailetProcessorImpl.java:158)
{code}
The postmortem is that for XYZ reason, we ingested a Map that do not have the
good actual types thus we fail serializing the associate attribute. This
prevent us from duplicating the attributes and causes the mail not to be split,
thus aborting mail processing.
We do not know where invalid data was first generated.
That's weaknesses of the Java parameter type systems.
We shall:
- Avoid serializing / deserializing attributes to duplicate them and instead
do something smarter
- Reject invalid collections/bad type parameters as early as possible.
This is potentially due to a custom extension.
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