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https://issues.apache.org/jira/browse/IGNITE-11471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16800030#comment-16800030
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Ivan Pavlukhin commented on IGNITE-11471:
-----------------------------------------
[~ibelyakov], [~vozerov], please pay attention that line (from patch) in method
{{JdbcThinTcpIo#nextServerIndex}}
{code}
return (int)(abs(nextIdx) % len);
{code}
can still return negative number because {{Math.abs}} returns
{{Long.MIN_VALUE}} if {{Long.MIN_VALUE}} is passed as argument and {{%}}
operators preserves a sign of a _dividend_ ({{-1 % 2 == -1}}).
> JDBC: Thin driver should start with a random server to connect
> --------------------------------------------------------------
>
> Key: IGNITE-11471
> URL: https://issues.apache.org/jira/browse/IGNITE-11471
> Project: Ignite
> Issue Type: Improvement
> Components: jdbc
> Reporter: Stanislav Lukyanov
> Assignee: Igor Belyakov
> Priority: Major
> Labels: newbie
> Fix For: 2.8
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Thin JDBC driver uses a list of server addresses to connect to. Connections
> created in a single JVM will use round-robin to choose the server to connect,
> yielding a uniform distribution. However, the round-robin always starts from
> the first server in the list. It means that multiple JVMs with the same JDBC
> connection URL and one connection each will all connect to the same server.
> Need to choose the first server randomly to have a better distribution.
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