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https://issues.apache.org/jira/browse/TRAFODION-2651?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gonzalo E Correa resolved TRAFODION-2651.
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Resolution: Fixed
> The monitor to monitor process communication cannot handle a network reset
> ---------------------------------------------------------------------------
>
> Key: TRAFODION-2651
> URL: https://issues.apache.org/jira/browse/TRAFODION-2651
> Project: Apache Trafodion
> Issue Type: Bug
> Components: foundation
> Affects Versions: 2.2-incubating
> Reporter: Gonzalo E Correa
> Assignee: Gonzalo E Correa
> Fix For: 2.3
>
>
> The monitor to monitor socket communication does not have reconnect logic to
> handle a network reset or transient network errors.
> Analysis:
> • During a ~20 second network reset window, no errors are detected by
> open sockets
> o Open sockets are dead, but there is no indication from the TCP/IP stack
> that socket is in an error condition
> • Once the network is restored, a CONNECTIONLOSS is reported by the
> Zookeeper Client Library.
> o However, reconnect logic reestablishes connection with quorum.
> • At EPOLL expiration time, EPOLL logic report “Not heard from peer=n”
> and treats peer as Node Down.
> o The node down logic deletes corresponding znode,
> CZClient::WatchNodeDelete()
> o All monitor processes continually check for expired znodes for each
> node in the cluster, including their own znode
> An expired znode is handled as a down node
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