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https://issues.apache.org/jira/browse/IGNITE-6895?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitriy Sorokin reassigned IGNITE-6895:
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Assignee: Dmitriy Sorokin
> TX deadlock monitoring
> ----------------------
>
> Key: IGNITE-6895
> URL: https://issues.apache.org/jira/browse/IGNITE-6895
> Project: Ignite
> Issue Type: Improvement
> Reporter: Anton Vinogradov
> Assignee: Dmitriy Sorokin
> Labels: iep-7
> Fix For: 2.4
>
>
> Deadlocks with Cache Transactions
> Description
> Deadlocks of this type are possible if user locks 2 or more keys within 2 or
> more transactions in different orders (this does not apply to OPTIMISTIC
> SERIALIZABLE transactions as they are capable to detect deadlock and choose
> winning tx). Currently, Ignite can detect deadlocked transactions but this
> procedure is started only for transactions that have timeout set explicitly
> or default timeout in configuration set to value greater than 0.
> Detection and Solution
> Each NEAR node should periodically (need new config property?) scan the list
> of local transactions and initiate the same procedure as we have now for
> timed out transactions. If deadlock found it should be reported to logs. Log
> record should contain: near nodes, transaction IDs, cache names, keys
> (limited to several tens of) involved in deadlock. User should have ability
> to configure default behavior - REPORT_ONLY, ROLLBACK (any more?) or manually
> rollback selected transaction through web console or Visor.
> Report
> If deadlock found it should be reported to logs. Log record should contain:
> near nodes, transaction IDs, cache names, keys (limited to several tens of)
> involved in deadlock.
> Also there should be a screen in Web Console that will list all ongoing
> transactions in the cluster including the following info:
> - Near node
> - Start time
> - DHT nodes
> - Pending Locks (by request)
> Web Console should provide ability to rollback any transaction via UI.
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