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https://issues.apache.org/jira/browse/IGNITE-9160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nikolai Kulagin updated IGNITE-9160:
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Summary: FindBugs: NPE and CCE on equals() methods (was: NPE and CCE on
equals() methods)
> FindBugs: NPE and CCE on equals() methods
> -----------------------------------------
>
> Key: IGNITE-9160
> URL: https://issues.apache.org/jira/browse/IGNITE-9160
> Project: Ignite
> Issue Type: Bug
> Components: cache
> Affects Versions: 2.6
> Reporter: Nikolai Kulagin
> Assignee: Nikolai Kulagin
> Priority: Minor
> Labels: newbie
> Fix For: 2.7
>
>
> Some classes have Incorrect equals() method:
> {code:java}
> // GridDhtPartitionMap.java
> @Override public boolean equals(Object o) {
> if (this == o)
> return true;
> GridDhtPartitionMap other = (GridDhtPartitionMap)o;
> return other.nodeId.equals(nodeId) && other.updateSeq == updateSeq;
> }{code}
> In this case, we can get CCE
> {code:java}
> GridDhtPartitionMap gridDhtPartMap = new GridDhtPartitionMap();
> gridDhtPartMap.equals(new Object());
> --------------------------------------------------------------
> Exception in thread "main" java.lang.ClassCastException: java.lang.Object
> cannot be cast to
> org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionMap
> at
> org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionMap.equals(GridDhtPartitionMap.java:319)
> at ru.zzzadruga.Ignite.main(Ignite.java:9){code}
> Or NPE
> {code:java}
> GridDhtPartitionMap gridDhtPartMap = new GridDhtPartitionMap();
> gridDhtPartMap.equals(null);
> --------------------------------------------------------------
> Exception in thread "main" java.lang.NullPointerException
> at
> org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionMap.equals(GridDhtPartitionMap.java:321)
> at ru.zzzadruga.Ignite.main(Ignite.java:9){code}
> The following code will prevent this
> {code:java}
> if (o == null || getClass() != o.getClass())
> return false;{code}
> List of classes with similar problems:
>
> *GridDhtPartitionFullMap -* NPE and CCE
> *GridDhtPartitionMap* - NPE and CCE
> *GridNearOptimisticTxPrepareFuture* - NPE and CCE
> *GridCacheMvccCandidate* - CCE
> *GridDhtPartitionExchangeId* - CCE
> *GridTuple6* - CCE
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