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https://issues.apache.org/jira/browse/IGNITE-8788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16512585#comment-16512585
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Ilya Kasnacheev commented on IGNITE-8788:
-----------------------------------------
You don't even have to restart anything or wait. If Ignite client lacks
cacheConfigurations, it will get those from server, but Cassandra cache store
will be non-usable, producing the same NPE error. [~irudyak] can you please
take a look?
> Getting NullPointerException during commit into cassandra, after reconnecting
> to ignite server
> ----------------------------------------------------------------------------------------------
>
> Key: IGNITE-8788
> URL: https://issues.apache.org/jira/browse/IGNITE-8788
> Project: Ignite
> Issue Type: Bug
> Components: cassandra
> Reporter: Yashasvi Kotamraju
> Assignee: Igor Rudyak
> Priority: Major
>
> When ignite client reconnects to restarted ignite server, while commiting
> data into cassandra NullPointerException is observed for random runs.
> caused by: java.lang.NullPointerException
> at
> org.apache.ignite.cache.store.cassandra.persistence.PojoField.getValueFromObject(PojoField.java:167)
>
> at
> org.apache.ignite.cache.store.cassandra.persistence.PersistenceController.bindValues(PersistenceController.java:450)
>
> at
> org.apache.ignite.cache.store.cassandra.persistence.PersistenceController.bindKeyValue(PersistenceController.java:202)
>
> at
> org.apache.ignite.cache.store.cassandra.session.transaction.WriteMutation.bindStatement(WriteMutation.java:58)
>
> at
> org.apache.ignite.cache.store.cassandra.session.CassandraSessionImpl.execute(CassandraSessionImpl.java:499)
>
>
> After going through the source code
> there is a suspicion that its a java serialization issue in ignite cassandra
> module
> In org.apache.ignite.cache.store.cassandra.persistence.PojoField.java, there
> is a PojoFieldAccessor instance variable which is transient type, so it will
> not be part of serialization and if PojoField object is serialized and then
> deserialized it would have PojoFieldAccessor as null. And in the Exception
> we are seeing the same, NullPointerException when getValue(..) is called on
> null PojoFieldAccessor in PojoField.getValueFromObject() method . So when
> ever PojoField object is serialized and then deserialized we might be
> observing the issue.
> Reproducer can be found at:
> http://apache-ignite-users.70518.x6.nabble.com/Getting-NullPointerException-during-commit-into-cassandra-after-reconnecting-to-ignite-server-td22005.html
>
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