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https://issues.apache.org/jira/browse/IGNITE-4111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16716555#comment-16716555
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Alexei Scherbakov commented on IGNITE-4111:
-------------------------------------------

[~NSAmelchev],

Always fails for me. Try running it several times. Looks like a race on client 
reconnect and node startup (discovery is not initialized yet). 
{noformat}
java.lang.NullPointerException
at 
org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi.getRemoteNodes(TcpDiscoverySpi.java:454)
at 
org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi.isHandshakeWaitSupported(TcpCommunicationSpi.java:4094)
at 
org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi.access$400(TcpCommunicationSpi.java:274)
at 
org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi$2.onConnected(TcpCommunicationSpi.java:418)
at 
org.apache.ignite.internal.util.nio.GridNioFilterChain$TailFilter.onSessionOpened(GridNioFilterChain.java:251)
at 
org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedSessionOpened(GridNioFilterAdapter.java:88)
at 
org.apache.ignite.internal.util.nio.GridNioCodecFilter.onSessionOpened(GridNioCodecFilter.java:67)
at 
org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedSessionOpened(GridNioFilterAdapter.java:88)
at 
org.apache.ignite.internal.util.nio.GridConnectionBytesVerifyFilter.onSessionOpened(GridConnectionBytesVerifyFilter.java:58)
at 
org.apache.ignite.internal.util.nio.GridNioFilterAdapter.proceedSessionOpened(GridNioFilterAdapter.java:88)
at 
org.apache.ignite.internal.util.nio.GridNioServer$HeadFilter.onSessionOpened(GridNioServer.java:3503)
at 
org.apache.ignite.internal.util.nio.GridNioFilterChain.onSessionOpened(GridNioFilterChain.java:139)
at 
org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.register(GridNioServer.java:2616)
at 
org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.bodyInternal(GridNioServer.java:1974)
at 
org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.body(GridNioServer.java:1795)
at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:120)
at java.lang.Thread.run(Thread.java:745){noformat}
 

 

 

 

> Communication fails to send message if target node did not finish join process
> ------------------------------------------------------------------------------
>
>                 Key: IGNITE-4111
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4111
>             Project: Ignite
>          Issue Type: Bug
>          Components: general
>            Reporter: Semen Boikov
>            Assignee: Amelchev Nikita
>            Priority: Minor
>             Fix For: 2.8
>
>         Attachments: test onFirstMessage hang.log
>
>
> Currently this scenario is possible:
> - joining node sent join request and waits for 
> TcpDiscoveryNodeAddFinishedMessage inside ServerImpl.joinTopology
> - others nodes already see this node and can send messages to it (for example 
> try to run compute job on this node)
> - joining node can not receive message: TcpCommunicationSpi will hang inside 
> 'onFirstMessage' on 'getSpiContext' call, so sending node will get error 
> trying to establish connection
> Possible fix: if in onFirstMessage() spi context is not available, then 
> TcpCommunicationSpi  should send special response which indicates that this 
> node is not ready yet, and sender should retry after some time.
> Also need check internal code for places where message can be unnecessarily 
> sent to node: one such place is 
> GridCachePartitionExchangeManager.refreshPartitions - message is sent to all 
> known nodes, but here we can filter by node order / finished exchage version.



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