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https://issues.apache.org/jira/browse/IGNITE-11730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16816200#comment-16816200
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Ilya Kasnacheev commented on IGNITE-11730:
------------------------------------------

[~akalashnikov] seems like this fix is working, I can no longer cause clients 
to segment.

> Discovery Compression check fails when nodes reconnect to cluster
> -----------------------------------------------------------------
>
>                 Key: IGNITE-11730
>                 URL: https://issues.apache.org/jira/browse/IGNITE-11730
>             Project: Ignite
>          Issue Type: Bug
>          Components: general
>    Affects Versions: 2.7
>            Reporter: Ilya Kasnacheev
>            Assignee: Anton Kalashnikov
>            Priority: Major
>
> There is a check that Discovery Data Bag compression is supported by all 
> nodes.
> Apparently this check does not work when nodes reconnect after server 
> restart. When there is at least one client node that does not support this 
> feature, clients will still send zipped data that server would not 
> understand, leaving to following server error:
> {code}
> [15:46:47,101][SEVERE][tcp-disco-msg-worker-#2][TcpDiscoverySpi] Failed to 
> unmarshal discovery data for component: 0
> class org.apache.ignite.IgniteCheckedException: Failed to deserialize object 
> with given class loader: sun.misc.Launcher$AppClassLoader@18b4aac2
>         at 
> org.apache.ignite.marshaller.jdk.JdkMarshaller.unmarshal0(JdkMarshaller.java:147)
>         at 
> org.apache.ignite.marshaller.AbstractNodeNameAwareMarshaller.unmarshal(AbstractNodeNameAwareMarshaller.java:94)
>         at 
> org.apache.ignite.marshaller.jdk.JdkMarshaller.unmarshal0(JdkMarshaller.java:161)
>         at 
> org.apache.ignite.marshaller.AbstractNodeNameAwareMarshaller.unmarshal(AbstractNodeNameAwareMarshaller.java:82)
>         at 
> org.apache.ignite.internal.util.IgniteUtils.unmarshal(IgniteUtils.java:9922)
>         at 
> org.apache.ignite.spi.discovery.tcp.internal.DiscoveryDataPacket.unmarshalData(DiscoveryDataPacket.java:290)
>         at 
> org.apache.ignite.spi.discovery.tcp.internal.DiscoveryDataPacket.unmarshalJoiningNodeData(DiscoveryDataPacket.java:169)
>         at 
> org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi.onExchange(TcpDiscoverySpi.java:2076)
>         at 
> org.apache.ignite.spi.discovery.tcp.ServerImpl$RingMessageWorker.processNodeAddedMessage(ServerImpl.java:4620)
>         at 
> org.apache.ignite.spi.discovery.tcp.ServerImpl$RingMessageWorker.processJoinRequestMessage(ServerImpl.java:4307)
>         at 
> org.apache.ignite.spi.discovery.tcp.ServerImpl$RingMessageWorker.processMessage(ServerImpl.java:2962)
>         at 
> org.apache.ignite.spi.discovery.tcp.ServerImpl$RingMessageWorker.processMessage(ServerImpl.java:2729)
>         at 
> org.apache.ignite.spi.discovery.tcp.ServerImpl$MessageWorker.body(ServerImpl.java:7496)
>         at 
> org.apache.ignite.spi.discovery.tcp.ServerImpl$RingMessageWorker.body(ServerImpl.java:2833)
>         at 
> org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
>         at 
> org.apache.ignite.spi.discovery.tcp.ServerImpl$MessageWorkerThread.body(ServerImpl.java:7427)
>         at org.apache.ignite.spi.IgniteSpiThread.run(IgniteSpiThread.java:62)
> Caused by: java.io.EOFException
>         at 
> java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2638)
>         at 
> java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:3113)
>         at 
> java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:853)
>         at java.io.ObjectInputStream.<init>(ObjectInputStream.java:349)
>         at 
> org.apache.ignite.marshaller.jdk.JdkMarshallerObjectInputStream.<init>(JdkMarshallerObjectInputStream.java:43)
>         at 
> org.apache.ignite.marshaller.jdk.JdkMarshaller.unmarshal0(JdkMarshaller.java:137)
>         ... 16 more
> {code}
> and client nodes will fail with following error:
> {code}
> [15:46:47,175][SEVERE][tcp-client-disco-msg-worker-#4][] Critical system 
> error detected. Will be handled accordingly to configured handler [hnd=class 
> o.a.i.failure.StopNodeOrHaltFailureHandler, failureCtx=FailureContext 
> [type=CRITICAL_ERROR, err=class o.a.i.IgniteException: Node with 
> BaselineTopology cannot join mixed cluster running in compatibility mode]]
> class org.apache.ignite.IgniteException: Node with BaselineTopology cannot 
> join mixed cluster running in compatibility mode
>         at 
> org.apache.ignite.internal.processors.cluster.GridClusterStateProcessor.onGridDataReceived(GridClusterStateProcessor.java:727)
>         at 
> org.apache.ignite.internal.managers.discovery.GridDiscoveryManager$5.onExchange(GridDiscoveryManager.java:899)
>         at 
> org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi.onExchange(TcpDiscoverySpi.java:2083)
>         at 
> org.apache.ignite.spi.discovery.tcp.ClientImpl$MessageWorker.processNodeAddFinishedMessage(ClientImpl.java:2149)
>         at 
> org.apache.ignite.spi.discovery.tcp.ClientImpl$MessageWorker.processDiscoveryMessage(ClientImpl.java:2028)
>         at 
> org.apache.ignite.spi.discovery.tcp.ClientImpl$MessageWorker.body(ClientImpl.java:1884)
>         at 
> org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
>         at 
> org.apache.ignite.spi.discovery.tcp.ClientImpl$1.body(ClientImpl.java:302)
>         at org.apache.ignite.spi.IgniteSpiThread.run(IgniteSpiThread.java:62)
> {code}
> They also seem to make awful lot of Communication connections in process.



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