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https://issues.apache.org/jira/browse/IGNITE-8166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16428765#comment-16428765
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Aleksey Plekhanov commented on IGNITE-8166:
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[~Jokser], Hello!
I found this bug on yesterdays master branch. In the PR 3633 I see 
{{cpFinishFut}} completion, not {{cpBeginFut}}

> stopGrid() hangs in some cases when node is invalidated and PDS is enabled
> --------------------------------------------------------------------------
>
>                 Key: IGNITE-8166
>                 URL: https://issues.apache.org/jira/browse/IGNITE-8166
>             Project: Ignite
>          Issue Type: Bug
>    Affects Versions: 2.5
>            Reporter: Aleksey Plekhanov
>            Priority: Major
>              Labels: iep-14
>
> Node invalidation via FailureProcessor can hang {{exchange-worker}} and 
> {{stopGrid()}} when PDS is enabled.
> Reproducer (reproducer is racy, sometimes finished without hang):
> {code:java}
> public class StopNodeHangsTest extends GridCommonAbstractTest {
>     /** Offheap size for memory policy. */
>     private static final int SIZE = 10 * 1024 * 1024;
>     /** Page size. */
>     static final int PAGE_SIZE = 2048;
>     /** Number of entries. */
>     static final int ENTRIES = 2_000;
>     /** {@inheritDoc} */
>     @Override protected IgniteConfiguration getConfiguration(String 
> igniteInstanceName) throws Exception {
>         IgniteConfiguration cfg = super.getConfiguration(igniteInstanceName);
>         DataStorageConfiguration dsCfg = new DataStorageConfiguration();
>         DataRegionConfiguration dfltPlcCfg = new DataRegionConfiguration();
>         dfltPlcCfg.setName("dfltPlc");
>         dfltPlcCfg.setInitialSize(SIZE);
>         dfltPlcCfg.setMaxSize(SIZE);
>         dfltPlcCfg.setPersistenceEnabled(true);
>         dsCfg.setDefaultDataRegionConfiguration(dfltPlcCfg);
>         dsCfg.setPageSize(PAGE_SIZE);
>         cfg.setDataStorageConfiguration(dsCfg);
>         cfg.setFailureHandler(new FailureHandler() {
>             @Override public boolean onFailure(Ignite ignite, FailureContext 
> failureCtx) {
>                 return true;
>             }
>         });
>         return cfg;
>     }
>     public void testStopNodeHangs() throws Exception {
>         cleanPersistenceDir();
>         IgniteEx ignite0 = startGrid(0);
>         IgniteEx ignite1 = startGrid(1);
>         ignite1.cluster().active(true);
>         awaitPartitionMapExchange();
>         IgniteCache cache = ignite1.getOrCreateCache("TEST");
>         Map<Integer, Object> entries = new HashMap<>();
>         for (int i = 0; i < ENTRIES; i++)
>             entries.put(i, new byte[PAGE_SIZE * 2 / 3]);
>         cache.putAll(entries);
>         ignite1.context().failure().process(new 
> FailureContext(FailureType.CRITICAL_ERROR, null));
>         stopGrid(0);
>         stopGrid(1);
>     }
> }
> {code}
> {{stopGrid(1)}} waiting until exchange finished, {{exchange-worker}} waits on 
> method {{GridCacheDatabaseSharedManager#checkpointReadLock}} for 
> {{CheckpointProgressSnapshot#cpBeginFut}}, but this future is never done 
> because {{db-checkpoint-thread}} got exception at 
> {{GridCacheDatabaseSharedManager.Checkpointer#markCheckpointBegin}} thrown by 
> {{FileWriteAheadLogManager#checkNode}} and leave method 
> {{markCheckpointBegin}} before future is done ({{curr.cpBeginFut.onDone();}})



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