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https://issues.apache.org/jira/browse/IGNITE-7575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Kuznetsov updated IGNITE-7575:
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Description:
In case of concurrent updates that affects some common keys we get silent wrong
update count
There's single table with two columns: key and val.
I'm performing the same query that updates the same 1000 rows using 4 threads.
Query doesn't update keys, it only increments val.
In some cases I get expected exception "Failed to update some keys because they
had been modified concurrently" or have 1000 updated rows
In the other case, API tells me that more than 1000 rows updated. Expected
result are exception or successfull update of 1000 rows
see reproducer attached. It should be run against
{{ignite/examples/src/main/java/org/apache/ignite/examples/ExampleNodeStartup.java}}
was:
In case of concurrent updates that affects some common keys we get silent wrong
update count
There's single table with two columns: key and val.
I'm performing the same query that updates the same 1000 rows. Query doesn't
update keys, it only increments val.
In some cases I get expected exception "Failed to update some keys because they
had been modified concurrently" or have 1000 updated rows
In the other case, API tells me that more than 1000 rows updated. Expected
result are exception or successfull update of 1000 rows
see reproducer attached. It should be run against
{{ignite/examples/src/main/java/org/apache/ignite/examples/ExampleNodeStartup.java}}
> Concurrent updates of common keys cause silent wrong update count
> (intermittent issue)
> --------------------------------------------------------------------------------------
>
> Key: IGNITE-7575
> URL: https://issues.apache.org/jira/browse/IGNITE-7575
> Project: Ignite
> Issue Type: Bug
> Components: sql
> Reporter: Pavel Kuznetsov
> Assignee: Alexander Paschenko
> Priority: Major
> Attachments: UpdateTestDrive.java
>
>
> In case of concurrent updates that affects some common keys we get silent
> wrong update count
> There's single table with two columns: key and val.
> I'm performing the same query that updates the same 1000 rows using 4
> threads. Query doesn't update keys, it only increments val.
> In some cases I get expected exception "Failed to update some keys because
> they had been modified concurrently" or have 1000 updated rows
> In the other case, API tells me that more than 1000 rows updated. Expected
> result are exception or successfull update of 1000 rows
> see reproducer attached. It should be run against
> {{ignite/examples/src/main/java/org/apache/ignite/examples/ExampleNodeStartup.java}}
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