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https://issues.apache.org/jira/browse/IGNITE-18302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17750556#comment-17750556
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Andrey Novikov commented on IGNITE-18302:
-----------------------------------------
Let's move IgniteSession class to upper level as it will be used as value
object in SQL.
https://github.com/apache/ignite-extensions/pull/222#discussion_r1281232708
> ignite-spring-sessions: IgniteSession serialization drags its parent class
> --------------------------------------------------------------------------
>
> Key: IGNITE-18302
> URL: https://issues.apache.org/jira/browse/IGNITE-18302
> Project: Ignite
> Issue Type: Bug
> Components: extensions
> Reporter: Alexandr Shapkin
> Assignee: Alexandr Shapkin
> Priority: Major
>
> In short, there is a bug in ignite-spring-session-ext implementation.
> We store IgniteIndexedSessionRepository${{{}IgniteSession{}}} in the cache,
> but it’s an internal non-static class, having a reference to the parent
> [\{{{}IgniteIndexedSessionRepository{}}}] indirectly.
> Hence, during the serialization Ignite also writes {{{}name=this$0,
> type=Object, fieldId=0xCBDD23AA (-874699862){}}}, which is the reference to
> {{{}IgniteIndexedSessionRepository{}}}. That leads to the following issues:
> * we are serializing and saving internal utility data, like{{{{}} Ignite
> ignite{}}}, {{private IndexResolver<Session> indexResolver}} etc
> * one of the IgniteIndexedSessionRepository’s fields is IgniteCache itself -
> {{IgniteCache<String, IgniteSession> sessions}} that basically keeps every
> session so far leading to a StackOverflow error after some time.
>
> {code:java}
> [2022-11-25T17:27:29,268][ERROR][sys-stripe-0-#1%USERS_IGNITE%][GridCacheIoManager]
> Failed processing message [senderId=0f0ca915-d6cd-4580-92a3-1fbc3d2a5722,
> msg=GridNearSingleGetResponse [futId=1669397231378, res=-547701325,
> topVer=null, err=null, flags=0]] 2java.lang.StackOverflowError: null 3 at
> org.apache.ignite.internal.marshaller.optimized.OptimizedMarshallerUtils.descriptorFromCache(OptimizedMarshallerUtils.java:328)
> ~[ignite-core-8.8.22.jar:8.8.22] 4 at
> org.apache.ignite.internal.marshaller.optimized.OptimizedMarshallerUtils.classDescriptor(OptimizedMarshallerUtils.java:273)
> ~[ignite-core-8.8.22.jar:8.8.22] 5 at
> org.apache.ignite.internal.marshaller.optimized.OptimizedObjectInputStream.readObject0(OptimizedObjectInputStream.java:354)
> ~[ignite-core-8.8.22.jar:8.8.22] 6 at
> org.apache.ignite.internal.marshaller.optimized.OptimizedObjectInputStream.readObjectOverride(OptimizedObjectInputStream.java:211)
> ~[ignite-core-8.8.22.jar:8.8.22] 7 at
> java.io.ObjectInputStream.readObject(ObjectInputStream.java:480) ~[?:?] 8 at
> java.io.ObjectInputStream.readObject(ObjectInputStream.java:447) ~[?:?] 9 at
> org.apache.ignite.internal.processors.cache.GridCacheProxyImpl.readExternal(GridCacheProxyImpl.java:1662)
> ~[ignite-core-8.8.22.jar:8.8.22] 10 at
> org.apache.ignite.internal.marshaller.optimized.OptimizedObjectInputStream.readExternalizable(OptimizedObjectInputStream.java:569)
> ~[ignite-core-8.8.22.jar:8.8.22] 11 at
> org.apache.ignite.internal.marshaller.optimized.OptimizedClassDescriptor.read(OptimizedClassDescriptor.java:979)
> ~[ignite-core-8.8.22.jar:8.8.22] 12 at
> org.apache.ignite.internal.marshaller.optimized.OptimizedObjectInputStream.readObject0(OptimizedObjectInputStream.java:359)
> ~[ignite-core-8.8.22.jar:8.8.22] 13 at
> org.apache.ignite.internal.marshaller.optimized.OptimizedObjectInputStream.readObjectOverride(OptimizedObjectInputStream.java:211)
> ~[ignite-core-8.8.22.jar:8.8.22] 14 at
> java.io.ObjectInputStream.readObject(ObjectInputStream.java:480) ~[?:?] 15 at
> java.io.ObjectInputStream.readObject(ObjectInputStream.java:447) ~[?:?] 16...
> 17[2022-11-25T17:27:29,276][ERROR][sys-stripe-0-#1%USERS_IGNITE%][] Critical
> system error detected. Will be handled accordingly to configured handler
> [hnd=StopNodeOrHaltFailureHandler [tryStop=false, timeout=0,
> super=AbstractFailureHandler [ignoredFailureTypes=UnmodifiableSet
> [SYSTEM_WORKER_BLOCKED, SYSTEM_CRITICAL_OPERATION_TIMEOUT]]],
> failureCtx=FailureContext [type=CRITICAL_ERROR,
> err=java.lang.StackOverflowError]]{code}
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