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https://issues.apache.org/jira/browse/IGNITE-11378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Vinokurov resolved IGNITE-11378.
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Resolution: Not A Problem
There is the long checkpoint process caused by the small data region size.
> Critical system errors on cluster with enabled peristance
> ---------------------------------------------------------
>
> Key: IGNITE-11378
> URL: https://issues.apache.org/jira/browse/IGNITE-11378
> Project: Ignite
> Issue Type: Bug
> Components: persistence
> Affects Versions: 2.7
> Reporter: Pavel Vinokurov
> Priority: Major
> Attachments: CheckpointLockReproducer.java
>
>
> The attached reproducer shows the following exception during streaming data
> to cache:
> {code:java}
> [2019-02-21 16:15:23,202][ERROR][tcp-disco-msg-worker-[100a6976
> 0:0:0:0:0:0:0:1%lo:47500]-#19%3%][root] Critical system error detected. Will
> be handled accordingly to configured handler
> [hnd=StopNodeOrHaltFailureHandler [tryStop=false, timeout=0,
> super=AbstractFailureHandler [ignoredFailureTypes=UnmodifiableSet []]],
> failureCtx=FailureContext [type=SYSTEM_WORKER_BLOCKED, err=class
> o.a.i.IgniteException: GridWorker [name=data-streamer-stripe-5,
> igniteInstanceName=3, finished=false, heartbeatTs=1550754912905]]]
> class org.apache.ignite.IgniteException: GridWorker
> [name=data-streamer-stripe-5, igniteInstanceName=3, finished=false,
> heartbeatTs=1550754912905]
> {code}
> If the blocked timeout is changed by
> cfg.setSystemWorkerBlockedTimeout(30_000), after streaming data and
> restarting several nodes the following critical error occurs:
> {code:java}
> [2019-02-21 16:24:07,164][ERROR][grid-timeout-worker-#214%client%][G] Blocked
> system-critical thread has been detected. This can lead to cluster-wide
> undefined behaviour [threadName=tcp-comm-worker, blockedFor=36s]
> [2019-02-21 16:24:07,166][WARN ][grid-timeout-worker-#214%client%][G] Thread
> [name="tcp-comm-worker-#25%client%", id=482, state=TIMED_WAITING, blockCnt=0,
> waitCnt=729]
> [2019-02-21 16:24:07,168][ERROR][grid-timeout-worker-#214%client%][root]
> Critical system error detected. Will be handled accordingly to configured
> handler [hnd=StopNodeOrHaltFailureHandler [tryStop=false, timeout=0,
> super=AbstractFailureHandler [ignoredFailureTypes=UnmodifiableSet []]],
> failureCtx=FailureContext [type=SYSTEM_WORKER_BLOCKED, err=class
> o.a.i.IgniteException: GridWorker [name=tcp-comm-worker,
> igniteInstanceName=client, finished=false, heartbeatTs=1550755410331]]]
> class org.apache.ignite.IgniteException: GridWorker [name=tcp-comm-worker,
> igniteInstanceName=client, finished=false, heartbeatTs=1550755410331]
> {code}
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