[jira] [Comment Edited] (IGNITE-15343) NullPointerException occurs when restarting ignite client application

["Pavel Vinokurov (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-15343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17402837#comment-17402837 ] 

Pavel Vinokurov edited comment on IGNITE-15343 at 8/22/21, 5:22 PM:
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[~francopo] It would be helpful if you attached the logs from server nodes. The log messages indicated connection issues. Thus the server logs could show the cause of this issues


was (Author: pvinokurov):
[~francopo] It would be helpful if you attached the logs from server nodes.

> NullPointerException occurs when restarting ignite client application
> ---------------------------------------------------------------------
>
>                 Key: IGNITE-15343
>                 URL: https://issues.apache.org/jira/browse/IGNITE-15343
>             Project: Ignite
>          Issue Type: Bug
>            Reporter: Franco Po
>            Priority: Critical
>         Attachments: failed_startup-ignite_info.1st.attempt.log, failed_startup-ignite_info.2nd.attempt.log, successful_startup-ignite_info.log
>
>
> I upgraded one of my API backend applications from Apache Ignite 2.6 to GridGain Community Edition 8.8.5 successfully in live environment a couple of months ago. The entire setup is 2 instances of this ignite client application plus a cluster of 2 ignite server instances. A planned maintenance needed to restart the ignite client application. However, it couldn't be started again due to a sequence of below exceptions (see [^failed_startup-ignite_info.1st.attempt.log] and [^failed_startup-ignite_info.2nd.attempt.log] for full log):
>  # java.io.IOException: Failed to get acknowledge for message: TcpDiscoveryClientMetricsUpdateMessage [super=TcpDiscoveryAbstractMessage [sndNodeId=null, id=fef7e5e5b71-b588bb65-6fe8-4aff-8f17-4a9e8733369b, verifierNodeId=null, topVer=0, pendingIdx=0, failedNodes=null, isClient=true]]
>  # java.net.SocketException: Socket is closed
>  # java.lang.NullPointerException: null
>  # org.apache.ignite.IgniteCheckedException: Node stopped
> I could restart same ignite client applications running in hot standby environment where the ignite server contains no active data (see [^successful_startup-ignite_info.log]).
> Is this problem related to GG-17439 and IGNITE-11406? Which is equivalent version of ignite 2.10 in GainGrid edition?
> If anyone can provide insight as to how I can resolve this, that would be greatly appreciated.



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