Read Only transaction optimization doesn't work properly for RepeatableRead --------------------------------------------------------------------------- Key: ISPN-3542 URL: https://issues.jboss.org/browse/ISPN-3542 Project: Infinispan Issue Type: Bug Components: Transactions Affects Versions: 6.0.0.Beta1 Reporter: William Burns Assignee: William Burns Attachments: ISPN-3542-patch There is a readOnly optimization that Infinispan does to make sure we don't do a 2PC when there is no data to update. However the code for this does {code} public boolean isReadOnly() { return (modifications == null || modifications.isEmpty()) && (lookedUpEntries == null || lookedUpEntries.isEmpty()); } {code} For repeatable read we always add a value to lookedUpEntries so this optimization never works that isolation level. Looking closer it seems we do a 1PC when it is readOnly to clean up values, so there shouldn't be a need to care about lookedUpEntries (my guess is this was done as a way to test for locks).