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https://issues.apache.org/jira/browse/IGNITE-3195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16912133#comment-16912133
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Ignite TC Bot commented on IGNITE-3195:
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{panel:title=Branch: [pull/6688/head] Base: [master] : No blockers
found!|borderStyle=dashed|borderColor=#ccc|titleBGColor=#D6F7C1}{panel}
[TeamCity *--> Run :: All*
Results|https://ci.ignite.apache.org/viewLog.html?buildId=4522863&buildTypeId=IgniteTests24Java8_RunAll]
> Rebalancing: IgniteConfiguration.rebalanceThreadPoolSize is wrongly treated
> ---------------------------------------------------------------------------
>
> Key: IGNITE-3195
> URL: https://issues.apache.org/jira/browse/IGNITE-3195
> Project: Ignite
> Issue Type: Bug
> Components: cache
> Reporter: Denis Magda
> Assignee: Anton Vinogradov
> Priority: Major
> Labels: iep-16
> Fix For: 2.8
>
> Time Spent: 3h 50m
> Remaining Estimate: 0h
>
> Presently it's considered that the maximum number of threads that has to
> process all demand and supply messages coming from all the nodes must not be
> bigger than {{IgniteConfiguration.rebalanceThreadPoolSize}}.
> Current implementation relies on ordered messages functionality creating a
> number of topics equal to {{IgniteConfiguration.rebalanceThreadPoolSize}}.
> However, the implementation doesn't take into account that ordered messages,
> that correspond to a particular topic, are processed in parallel for
> different nodes. Refer to the implementation of
> {{GridIoManager.processOrderedMessage}} to see that for every topic there
> will be a unique {{GridCommunicationMessageSet}} for every node.
> Also to prove that this is true you can refer to this execution stack
> {noformat}
> java.lang.RuntimeException: HAPPENED DEMAND
> at
> org.apache.ignite.internal.processors.cache.GridCachePartitionExchangeManager$5.apply(GridCachePartitionExchangeManager.java:378)
> at
> org.apache.ignite.internal.processors.cache.GridCachePartitionExchangeManager$5.apply(GridCachePartitionExchangeManager.java:364)
> at
> org.apache.ignite.internal.processors.cache.GridCacheIoManager.processMessage(GridCacheIoManager.java:622)
> at
> org.apache.ignite.internal.processors.cache.GridCacheIoManager.onMessage0(GridCacheIoManager.java:320)
> at
> org.apache.ignite.internal.processors.cache.GridCacheIoManager.access$300(GridCacheIoManager.java:81)
> at
> org.apache.ignite.internal.processors.cache.GridCacheIoManager$OrderedMessageListener.onMessage(GridCacheIoManager.java:1125)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager.invokeListener(GridIoManager.java:1219)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager.access$1600(GridIoManager.java:105)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager$GridCommunicationMessageSet.unwind(GridIoManager.java:2456)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager.unwindMessageSet(GridIoManager.java:1179)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager.access$1900(GridIoManager.java:105)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager$6.run(GridIoManager.java:1148)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> All this means that in fact the number of threads that will be busy with
> replication activity will be equal to
> {{IgniteConfiguration.rebalanceThreadPoolSize}} x
> number_of_nodes_participated_in_rebalancing
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