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From "Semen Boikov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-2854) Need to implement deadlock detection
Date Mon, 18 Apr 2016 07:35:25 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-2854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15245244#comment-15245244

Semen Boikov commented on IGNITE-2854:


I have comments regarding TransactionDeadlockException:
- it should be placed in 'org.apache.ignite.transactions' package and extend IgniteException,
also please add some javadoc explaining when it can be thrown
- we need to add it in 'throws' clause and javadoc for all org.apache.ignite.transactions.Transaction's,
IgniteCache methods where it can be thrown. I also see that others transactions exceptions
(TransactionTimeoutException, TransactionRollbackException, TransactionOptimisticException,
TransactionHeuristicException) are not declared in 'throws' and javadoc, please fix it as
well as part of this ticket.

> Need to implement deadlock detection
> ------------------------------------
>                 Key: IGNITE-2854
>                 URL: https://issues.apache.org/jira/browse/IGNITE-2854
>             Project: Ignite
>          Issue Type: New Feature
>          Components: cache
>    Affects Versions: 1.5.0.final
>            Reporter: Valentin Kulichenko
>            Assignee: Andrey Gura
>             Fix For: 1.6
> Currently, if transactional deadlock occurred, there is no easy way to find out which
locks were reordered.
> We need to add a mechanism that will collect information about awating candidates, analyze
it and show guilty keys. Most likely this should be implemented with the help of custom discovery
> In addition we should automatically execute this mechanism if transaction times out and
add information to timeout exception.

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