[CASSANDRA-6893] Unintended update with conditional statement

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.0.7
• Component/s: Feature/Lightweight Transactions
• Labels: LWT qa-resolved

Environment

Ubuntu Precise 64bit / Cassandra 2.0.6

• Severity: Normal
• Since Version: 2.0.6
• Assignee: Sylvain Lebresne
• Reporter: Suguru Namura

Authors

Sylvain Lebresne

Reviewers

Aleksey Yeschenko

• Tester: Michael Shuler
• Created: 20/Mar/14 10:14
• Updated: 25/Oct/19 13:11
• Resolved: 02/Apr/14 18:15

Description

After updated to 2.0.6, I have encountered the strange behavior of conditional updates.

When I executed CQL like UPDATE test SET value = ? WHERE id = ? IF value = ? in concurrent, sometimes cassandra returns true even if value is not satisfied the condition.

I have attached the program which reproduce this issue. The program works fine in cassandra 2.0.5. But it seems that resets values while execution in 2.0.6.