[jira] [Created] (IGNITE-8957) testFailGetLock() constantly fails. Last entry checkpoint history can be empty

["Maxim Muzafarov (JIRA)" <ji...@apache.org>]

Maxim Muzafarov created IGNITE-8957:
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             Summary: testFailGetLock() constantly fails. Last entry checkpoint history can be empty
                 Key: IGNITE-8957
                 URL: https://issues.apache.org/jira/browse/IGNITE-8957
             Project: Ignite
          Issue Type: Task
          Components: persistence
    Affects Versions: 2.7
            Reporter: Maxim Muzafarov


IgniteChangeGlobalStateTest#testFailGetLock constantly fails with exception:

{code}
java.lang.AssertionError
	at org.apache.ignite.internal.processors.cache.persistence.checkpoint.CheckpointHistory.onCheckpointFinished(CheckpointHistory.java:205)
	at org.apache.ignite.internal.processors.cache.persistence.GridCacheDatabaseSharedManager$Checkpointer.markCheckpointEnd(GridCacheDatabaseSharedManager.java:3654)
	at org.apache.ignite.internal.processors.cache.persistence.GridCacheDatabaseSharedManager$Checkpointer.doCheckpoint(GridCacheDatabaseSharedManager.java:3178)
	at org.apache.ignite.internal.processors.cache.persistence.GridCacheDatabaseSharedManager$Checkpointer.body(GridCacheDatabaseSharedManager.java:2953)
	at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
	at java.lang.Thread.run(Thread.java:748)
{code}

As Sergey Chugunov [mentioned|https://issues.apache.org/jira/browse/IGNITE-8737?focusedCommentId=16535062&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16535062], issue can be solved different ways:

{quote}
It seems we missed a case when lastEntry may be empty. We may choose here from two options:

* Check if histMap is empty inside onCheckpointFinished. If it is just don't log anything (it was the very first checkpoint).
* Check in caller that there is no history, calculate necessary index in caller and pass it to onCheckpointFinished to prepare correct log message.{quote}



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